* Removed all Id tags.
[cacao.git] / src / vm / jit / mips / codegen.c
index 4d148930f8bb680ef114e30dee46bedf50256d16..01f0c30027544525d76041631cfc21ed9fd6826f 100644 (file)
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    02110-1301, USA.
 
-   Contact: cacao@cacaojvm.org
-
-   Authors: Andreas Krall
-            Reinhard Grafl
-            Christian Thalinger
-            Christian Ullrich
-            Edwin Steiner
-
-   Contains the codegenerator for an MIPS (R4000 or higher) processor.
-   This module generates MIPS machine code for a sequence of
-   intermediate code commands (ICMDs).
-
-   $Id: codegen.c 7206 2007-01-11 22:39:52Z twisti $
-
 */
 
 
 #include "vm/jit/mips/arch.h"
 #include "vm/jit/mips/codegen.h"
 
+#include "mm/memory.h"
+
+#include "native/localref.h"
 #include "native/native.h"
 
-#if defined(ENABLE_THREADS)
-# include "threads/native/lock.h"
-#endif
+#include "threads/lock-common.h"
 
 #include "vm/builtin.h"
-#include "vm/class.h"
 #include "vm/exceptions.h"
-#include "vm/options.h"
-#include "vm/stringlocal.h"
 #include "vm/vm.h"
+
+#include "vm/jit/abi.h"
 #include "vm/jit/asmpart.h"
 #include "vm/jit/codegen-common.h"
 #include "vm/jit/dseg.h"
 #include "vm/jit/emit-common.h"
 #include "vm/jit/jit.h"
-#include "vm/jit/patcher.h"
+#include "vm/jit/md.h"
+#include "vm/jit/patcher-common.h"
 #include "vm/jit/reg.h"
 #include "vm/jit/replace.h"
 
 # include "vm/jit/allocator/lsra.h"
 #endif
 
+#include "vmcore/class.h"
+#include "vmcore/options.h"
+
 
-/* codegen *********************************************************************
+/* codegen_emit ****************************************************************
 
    Generates machine code.
 
 *******************************************************************************/
 
-bool codegen(jitdata *jd)
+bool codegen_emit(jitdata *jd)
 {
        methodinfo         *m;
        codeinfo           *code;
@@ -115,12 +105,14 @@ bool codegen(jitdata *jd)
 
        /* prevent compiler warnings */
 
+       s1          = 0;
        d           = 0;
        fieldtype   = 0;
        lm          = NULL;
        um          = NULL;
        bte         = NULL;
        currentline = 0;
+       uf          = NULL;
 
        {
        s4 i, p, t, l;
@@ -221,116 +213,72 @@ bool codegen(jitdata *jd)
                        continue;
 
                var = VAR(varindex);
+               s1  = md->params[p].regoff;
 
-               s1 = md->params[p].regoff;
                if (IS_INT_LNG_TYPE(t)) {                    /* integer args          */
                        if (!md->params[p].inmemory) {           /* register arguments    */
 #if SIZEOF_VOID_P == 8
-                               s2 = rd->argintregs[s1];
-                               if (!(var->flags & INMEMORY)) {      /* reg arg -> register   */
-                                       M_INTMOVE(s2, var->vv.regoff);
-                               } else {                             /* reg arg -> spilled    */
-                                       M_LST(s2, REG_SP, var->vv.regoff * 8);
-                               }
+                               if (!(var->flags & INMEMORY))
+                                       M_INTMOVE(s1, var->vv.regoff);
+                               else
+                                       M_LST(s1, REG_SP, var->vv.regoff);
 #else
-                               if (IS_2_WORD_TYPE(t)) {
-                                       s2 = PACK_REGS(rd->argintregs[GET_LOW_REG(s1)],
-                                                                  rd->argintregs[GET_HIGH_REG(s1)]);
-                                       if (!(var->flags & INMEMORY))    /* reg arg -> register   */
-                                               M_LNGMOVE(s2, var->vv.regoff);
-                                       else                             /* reg arg -> spilled    */
-                                               M_LST(s2, REG_SP, var->vv.regoff * 8);
+                               if (!(var->flags & INMEMORY)) {
+                                       if (IS_2_WORD_TYPE(t))
+                                               M_LNGMOVE(s1, var->vv.regoff);
+                                       else
+                                               M_INTMOVE(s1, var->vv.regoff);
                                }
                                else {
-                                       s2 = rd->argintregs[s1];
-                                       if (!(var->flags & INMEMORY))    /* reg arg -> register   */
-                                               M_INTMOVE(s2, var->vv.regoff);
-                                       else                             /* reg arg -> spilled    */
-                                               M_IST(s2, REG_SP, var->vv.regoff * 8);
+                                       if (IS_2_WORD_TYPE(t))
+                                               M_LST(s1, REG_SP, var->vv.regoff);
+                                       else
+                                               M_IST(s1, REG_SP, var->vv.regoff);
                                }
 #endif
-                       } else {                                 /* stack arguments       */
-                               if (!(var->flags & INMEMORY)) {      /* stack arg -> register */
+                       }
+                       else {                                   /* stack arguments       */
+                               if (!(var->flags & INMEMORY)) {
 #if SIZEOF_VOID_P == 8
-                                       M_LLD(var->vv.regoff, REG_SP, (cd->stackframesize + s1) * 8);
+                                       M_LLD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1);
 #else
                                        if (IS_2_WORD_TYPE(t))
-                                               M_LLD(var->vv.regoff, REG_SP, (cd->stackframesize + s1) * 8);
+                                               M_LLD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1);
                                        else
-                                               M_ILD(var->vv.regoff, REG_SP, (cd->stackframesize + s1) * 8);
+                                               M_ILD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1);
 #endif
-                               } else {                             /* stack arg -> spilled  */
-                                       var->vv.regoff = cd->stackframesize + s1;
-                               }
+                               }
+                               else
+                                       var->vv.regoff = cd->stackframesize * 8 + s1;
                        }
-
-               } else {                                     /* floating args         */
-                       if (!md->params[p].inmemory) {           /* register arguments    */
-#if SIZEOF_VOID_P == 8
-                               s2 = rd->argfltregs[s1];
-                               if (!(var->flags & INMEMORY)) {      /* reg arg -> register   */
+               }
+               else {                                       /* floating args         */
+                       if (!md->params[p].inmemory) {
+                               if (!(var->flags & INMEMORY)) {
                                        if (IS_2_WORD_TYPE(t))
-                                               M_DMOV(s2, var->vv.regoff);
+                                               M_DBLMOVE(s1, var->vv.regoff);
                                        else
-                                               M_FMOV(s2, var->vv.regoff);
-                               } else {                                         /* reg arg -> spilled    */
+                                               M_FLTMOVE(s1, var->vv.regoff);
+                               }
+                               else {
                                        if (IS_2_WORD_TYPE(t))
-                                               M_DST(s2, REG_SP, var->vv.regoff * 8);
+                                               M_DST(s1, REG_SP, var->vv.regoff);
                                        else
-                                               M_FST(s2, REG_SP, var->vv.regoff * 8);
+                                               M_FST(s1, REG_SP, var->vv.regoff);
                                }
-#else
-                               if ((p == 0) ||
-                                       ((p == 1) && IS_FLT_DBL_TYPE(md->paramtypes[0].type))) {
-                                       s2 = rd->argfltregs[s1];
-                                       if (!(var->flags & INMEMORY)) {  /* reg arg -> register   */
-                                               if (IS_2_WORD_TYPE(t))
-                                                       M_DBLMOVE(s2, var->vv.regoff);
-                                               else
-                                                       M_FLTMOVE(s2, var->vv.regoff);
-                                       }
-                                       else {                                   /* reg arg -> spilled    */
-                                               if (IS_2_WORD_TYPE(t))
-                                                       M_DST(s2, REG_SP, var->vv.regoff * 8);
-                                               else
-                                                       M_FST(s2, REG_SP, var->vv.regoff * 8);
-                                       }
-                               }
-                               else {
-                                       if (IS_2_WORD_TYPE(t)) {
-                                               s2 = PACK_REGS(rd->argintregs[GET_LOW_REG(s1)],
-                                                                          rd->argintregs[GET_HIGH_REG(s1)]);
-                                               if (!(var->flags & INMEMORY)) {
-                                                       M_MTC1(GET_LOW_REG(s2), var->vv.regoff);
-                                                       M_MTC1(GET_HIGH_REG(s2), var->vv.regoff + 1);
-                                                       M_NOP;
-                                               }
-                                               else
-                                                       M_LST(s2, REG_SP, var->vv.regoff * 8);
-                                       }
-                                       else {
-                                               s2 = rd->argintregs[s1];
-                                               if (!(var->flags & INMEMORY)) {
-                                                       M_MTC1(s2, var->vv.regoff);
-                                                       M_NOP;
-                                               }
-                                               else
-                                                       M_IST(s2, REG_SP, var->vv.regoff * 8);
-                                       }
-                               }
-#endif
-
-                       } else {                                 /* stack arguments       */
-                               if (!(var->flags & INMEMORY)) {      /* stack-arg -> register */
+                       }
+                       else {
+                               if (!(var->flags & INMEMORY)) {
                                        if (IS_2_WORD_TYPE(t))
-                                               M_DLD(var->vv.regoff, REG_SP, (cd->stackframesize + s1) * 8);
+                                               M_DLD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1);
                                        else
-                                               M_FLD(var->vv.regoff, REG_SP, (cd->stackframesize + s1) * 8);
-                               } else                               /* stack-arg -> spilled  */
-                                       var->vv.regoff = cd->stackframesize + s1;
+                                               M_FLD(var->vv.regoff, REG_SP, cd->stackframesize * 8 + s1);
+                               }
+                               else
+                                       var->vv.regoff = cd->stackframesize * 8 + s1;
                        }
                }
-       } /* end for */
+       }
 
        /* call monitorenter function */
 
@@ -345,10 +293,10 @@ bool codegen(jitdata *jd)
                        M_LDA(REG_SP, REG_SP, -(INT_ARG_CNT + FLT_ARG_CNT) * 8);
 
                        for (p = 0; p < INT_ARG_CNT; p++)
-                               M_AST(rd->argintregs[p], REG_SP, p * 8);
+                               M_AST(abi_registers_integer_argument[p], REG_SP, p * 8);
 
                        for (p = 0; p < FLT_ARG_CNT; p++)
-                               M_DST(rd->argfltregs[p], REG_SP, (INT_ARG_CNT + p) * 8);
+                               M_DST(abi_registers_float_argument[p], REG_SP, (INT_ARG_CNT + p) * 8);
 
                        s1 += INT_ARG_CNT + FLT_ARG_CNT;
                }
@@ -359,32 +307,27 @@ bool codegen(jitdata *jd)
                if (m->flags & ACC_STATIC) {
                        disp = dseg_add_address(cd, &m->class->object.header);
                        M_ALD(REG_A0, REG_PV, disp);
+                       disp = dseg_add_functionptr(cd, LOCK_monitor_enter);
+                       M_ALD(REG_ITMP3, REG_PV, disp);
                }
                else {
 /*                     emit_nullpointer_check(cd, iptr, REG_A0); */
-                       M_BNEZ(REG_A0, 6);
-                       M_NOP;
-
-                       M_LUI(REG_ITMP3, 0);
-                       M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
-                       codegen_add_nullpointerexception_ref(cd);
-                       M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
-                       M_JMP(REG_ITMP3);
-                       M_NOP;
+                       M_BNEZ(REG_A0, 2);
+                       disp = dseg_add_functionptr(cd, LOCK_monitor_enter);
+                       M_ALD(REG_ITMP3, REG_PV, disp);                   /* branch delay */
+                       M_ALD_INTERN(REG_ZERO, REG_ZERO, EXCEPTION_HARDWARE_NULLPOINTER);
                }
 
-               disp = dseg_add_functionptr(cd, LOCK_monitor_enter);
-               M_ALD(REG_ITMP3, REG_PV, disp);
                M_JSR(REG_RA, REG_ITMP3);
-               M_AST(REG_A0, REG_SP, s1 * 8);         /* branch delay */
+               M_AST(REG_A0, REG_SP, s1 * 8);                        /* branch delay */
 
 # if !defined(NDEBUG)
                if (opt_verbosecall) {
                        for (p = 0; p < INT_ARG_CNT; p++)
-                               M_ALD(rd->argintregs[p], REG_SP, p * 8);
+                               M_ALD(abi_registers_integer_argument[p], REG_SP, p * 8);
 
                        for (p = 0; p < FLT_ARG_CNT; p++)
-                               M_DLD(rd->argfltregs[p], REG_SP, (INT_ARG_CNT + p) * 8);
+                               M_DLD(abi_registers_float_argument[p], REG_SP, (INT_ARG_CNT + p) * 8);
 
 
                        M_LDA(REG_SP, REG_SP, (INT_ARG_CNT + FLT_ARG_CNT) * 8);
@@ -546,7 +489,8 @@ bool codegen(jitdata *jd)
                                cr   = iptr->sx.val.c.ref;
                                disp = dseg_add_unique_address(cd, cr);
 
-                               codegen_add_patch_ref(cd, PATCHER_aconst, cr, disp);
+                               patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_classinfo,
+                                                                         cr, disp);
 
                                M_ALD(d, REG_PV, disp);
                        }
@@ -565,23 +509,23 @@ bool codegen(jitdata *jd)
                /* load/store/copy/move operations ************************************/
 
                case ICMD_ILOAD:      /* ...  ==> ..., content of local variable      */
-               case ICMD_LLOAD:      /* ...  ==> ..., content of local variable      */
-               case ICMD_ALOAD:      /* ...  ==> ..., content of local variable      */
-               case ICMD_FLOAD:      /* ...  ==> ..., content of local variable      */
-               case ICMD_DLOAD:      /* ...  ==> ..., content of local variable      */
+               case ICMD_LLOAD:
+               case ICMD_ALOAD:
+               case ICMD_FLOAD:
+               case ICMD_DLOAD:
                case ICMD_ISTORE:     /* ..., value  ==> ...                          */
-               case ICMD_LSTORE:     /* ..., value  ==> ...                          */
-               case ICMD_FSTORE:     /* ..., value  ==> ...                          */
-               case ICMD_DSTORE:     /* ..., value  ==> ...                          */
+               case ICMD_LSTORE:
+               case ICMD_FSTORE:
+               case ICMD_DSTORE:
                case ICMD_COPY:
                case ICMD_MOVE:
 
-                       emit_copy(jd, iptr, VAROP(iptr->s1), VAROP(iptr->dst));
+                       emit_copy(jd, iptr);
                        break;
 
                case ICMD_ASTORE:
                        if (!(iptr->flags.bits & INS_FLAG_RETADDR))
-                               emit_copy(jd, iptr, VAROP(iptr->s1), VAROP(iptr->dst));
+                               emit_copy(jd, iptr);
                        break;
 
 
@@ -991,22 +935,17 @@ bool codegen(jitdata *jd)
                case ICMD_LDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */
                case ICMD_LREM:       /* ..., val1, val2  ==> ..., val1 % val2        */
 
-                       bte = iptr->sx.s23.s3.bte;
-                       md  = bte->md;
+                       s1 = emit_load_s1(jd, iptr, REG_A0_A1_PACKED);
+                       s2 = emit_load_s2(jd, iptr, REG_A2_A3_PACKED);
 
-                       s2 = emit_load_s2(jd, iptr, REG_ITMP12_PACKED);
+                       /* XXX TODO: only do this if arithmetic check is really done! */
                        M_OR(GET_HIGH_REG(s2), GET_LOW_REG(s2), REG_ITMP3);
                        emit_arithmetic_check(cd, iptr, REG_ITMP3);
 
-                       s3 = PACK_REGS(rd->argintregs[GET_LOW_REG(md->params[1].regoff)],
-                                                  rd->argintregs[GET_HIGH_REG(md->params[1].regoff)]);
-                       M_LNGMOVE(s2, s3);
-
-                       s1 = emit_load_s1(jd, iptr, REG_ITMP12_PACKED);
-                       s3 = PACK_REGS(rd->argintregs[GET_LOW_REG(md->params[0].regoff)],
-                                                  rd->argintregs[GET_HIGH_REG(md->params[0].regoff)]);
-                       M_LNGMOVE(s1, s3);
+                       M_LNGMOVE(s1, REG_A0_A1_PACKED);
+                       M_LNGMOVE(s2, REG_A2_A3_PACKED);
 
+                       bte = iptr->sx.s23.s3.bte;
                        disp = dseg_add_functionptr(cd, bte->fp);
                        M_ALD(REG_ITMP3, REG_PV, disp);
                        M_JSR(REG_RA, REG_ITMP3);
@@ -1690,7 +1629,8 @@ bool codegen(jitdata *jd)
                        M_CVTDF(s1, d);
                        emit_store_dst(jd, iptr, d);
                        break;
-               
+
+#if SUPPORT_FLOAT_CMP
                case ICMD_FCMPL:      /* ..., val1, val2  ==> ..., val1 fcmpl val2    */
 
                        s1 = emit_load_s1(jd, iptr, REG_FTMP1);
@@ -1707,38 +1647,40 @@ bool codegen(jitdata *jd)
                        emit_store_dst(jd, iptr, d);
                        break;
 
-               case ICMD_DCMPL:      /* ..., val1, val2  ==> ..., val1 fcmpl val2    */
+               case ICMD_FCMPG:      /* ..., val1, val2  ==> ..., val1 fcmpg val2    */
 
                        s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                        s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
-                       M_FCMPULED(s1, s2);
-                       M_FBT(3);
-                       M_AADD_IMM(REG_ZERO, 1, d);
+                       M_FCMPOLTF(s1, s2);
+                       M_FBF(3);
+                       M_ASUB_IMM(REG_ZERO, 1, d);
                        M_BR(4);
                        M_NOP;
-                       M_FCMPEQD(s1, s2);
-                       M_ASUB_IMM(REG_ZERO, 1, d);
+                       M_FCMPEQF(s1, s2);
+                       M_AADD_IMM(REG_ZERO, 1, d);
                        M_CMOVT(REG_ZERO, d);
                        emit_store_dst(jd, iptr, d);
                        break;
-                       
-               case ICMD_FCMPG:      /* ..., val1, val2  ==> ..., val1 fcmpg val2    */
+#endif
+
+#if SUPPORT_DOUBLE_CMP
+               case ICMD_DCMPL:      /* ..., val1, val2  ==> ..., val1 fcmpl val2    */
 
                        s1 = emit_load_s1(jd, iptr, REG_FTMP1);
                        s2 = emit_load_s2(jd, iptr, REG_FTMP2);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP1);
-                       M_FCMPOLTF(s1, s2);
-                       M_FBF(3);
-                       M_ASUB_IMM(REG_ZERO, 1, d);
+                       M_FCMPULED(s1, s2);
+                       M_FBT(3);
+                       M_AADD_IMM(REG_ZERO, 1, d);
                        M_BR(4);
                        M_NOP;
-                       M_FCMPEQF(s1, s2);
-                       M_AADD_IMM(REG_ZERO, 1, d);
+                       M_FCMPEQD(s1, s2);
+                       M_ASUB_IMM(REG_ZERO, 1, d);
                        M_CMOVT(REG_ZERO, d);
                        emit_store_dst(jd, iptr, d);
                        break;
-
+                       
                case ICMD_DCMPG:      /* ..., val1, val2  ==> ..., val1 fcmpg val2    */
 
                        s1 = emit_load_s1(jd, iptr, REG_FTMP1);
@@ -1754,6 +1696,7 @@ bool codegen(jitdata *jd)
                        M_CMOVT(REG_ZERO, d);
                        emit_store_dst(jd, iptr, d);
                        break;
+#endif
 
 
                /* memory operations **************************************************/
@@ -1762,8 +1705,8 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
-                       emit_nullpointer_check(cd, iptr, s1);
-                       M_ILD(d, s1, OFFSET(java_arrayheader, size));
+                       /* implicit null-pointer check */
+                       M_ILD(d, s1, OFFSET(java_array_t, size));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1772,9 +1715,10 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_AADD(s2, s1, REG_ITMP3);
-                       M_BLDS(d, REG_ITMP3, OFFSET(java_bytearray, data[0]));
+                       /* implicit null-pointer check */
+                       M_BLDS(d, REG_ITMP3, OFFSET(java_bytearray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1783,10 +1727,11 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_AADD(s2, s1, REG_ITMP3);
                        M_AADD(s2, REG_ITMP3, REG_ITMP3);
-                       M_SLDU(d, REG_ITMP3, OFFSET(java_chararray, data[0]));
+                       /* implicit null-pointer check */
+                       M_SLDU(d, REG_ITMP3, OFFSET(java_chararray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;                  
 
@@ -1795,10 +1740,11 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_AADD(s2, s1, REG_ITMP3);
                        M_AADD(s2, REG_ITMP3, REG_ITMP3);
-                       M_SLDS(d, REG_ITMP3, OFFSET(java_shortarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_SLDS(d, REG_ITMP3, OFFSET(java_shortarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1807,10 +1753,11 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 2, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
-                       M_ILD(d, REG_ITMP3, OFFSET(java_intarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_ILD_INTERN(d, REG_ITMP3, OFFSET(java_intarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1823,10 +1770,11 @@ bool codegen(jitdata *jd)
 #else
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP12_PACKED);
 #endif
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 3, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
-                       M_LLD(d, REG_ITMP3, OFFSET(java_longarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_LLD_INTERN(d, REG_ITMP3, OFFSET(java_longarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1835,10 +1783,11 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 2, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
-                       M_FLD(d, REG_ITMP3, OFFSET(java_floatarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_FLD_INTERN(d, REG_ITMP3, OFFSET(java_floatarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1847,10 +1796,11 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        d = codegen_reg_of_dst(jd, iptr, REG_FTMP1);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 3, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
-                       M_DLD(d, REG_ITMP3, OFFSET(java_doublearray, data[0]));
+                       /* implicit null-pointer check */
+                       M_DLD_INTERN(d, REG_ITMP3, OFFSET(java_doublearray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1859,10 +1809,11 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, POINTERSHIFT, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
-                       M_ALD(d, REG_ITMP3, OFFSET(java_objectarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_ALD_INTERN(d, REG_ITMP3, OFFSET(java_objectarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1871,10 +1822,11 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_AADD(s2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_ITMP3);
-                       M_BST(s3, REG_ITMP1, OFFSET(java_bytearray, data[0]));
+                       /* implicit null-pointer check */
+                       M_BST(s3, REG_ITMP1, OFFSET(java_bytearray_t, data[0]));
                        break;
 
                case ICMD_CASTORE:    /* ..., arrayref, index, value  ==> ...         */
@@ -1882,29 +1834,31 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_AADD(s2, s1, REG_ITMP1);
                        M_AADD(s2, REG_ITMP1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_ITMP3);
-                       M_SST(s3, REG_ITMP1, OFFSET(java_chararray, data[0]));
+                       /* implicit null-pointer check */
+                       M_SST(s3, REG_ITMP1, OFFSET(java_chararray_t, data[0]));
                        break;
 
                case ICMD_IASTORE:    /* ..., arrayref, index, value  ==> ...         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 2, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_ITMP3);
-                       M_IST_INTERN(s3, REG_ITMP1, OFFSET(java_intarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_IST_INTERN(s3, REG_ITMP1, OFFSET(java_intarray_t, data[0]));
                        break;
 
                case ICMD_LASTORE:    /* ..., arrayref, index, value  ==> ...         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 3, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
 #if SIZEOF_VOID_P == 8
@@ -1912,29 +1866,32 @@ bool codegen(jitdata *jd)
 #else
                        s3 = emit_load_s3(jd, iptr, REG_ITMP23_PACKED);
 #endif
-                       M_LST_INTERN(s3, REG_ITMP1, OFFSET(java_longarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_LST_INTERN(s3, REG_ITMP1, OFFSET(java_longarray_t, data[0]));
                        break;
 
                case ICMD_FASTORE:    /* ..., arrayref, index, value  ==> ...         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 2, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_FTMP1);
-                       M_FST_INTERN(s3, REG_ITMP1, OFFSET(java_floatarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_FST_INTERN(s3, REG_ITMP1, OFFSET(java_floatarray_t, data[0]));
                        break;
 
                case ICMD_DASTORE:    /* ..., arrayref, index, value  ==> ...         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 3, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_FTMP1);
-                       M_DST_INTERN(s3, REG_ITMP1, OFFSET(java_doublearray, data[0]));
+                       /* implicit null-pointer check */
+                       M_DST_INTERN(s3, REG_ITMP1, OFFSET(java_doublearray_t, data[0]));
                        break;
 
 
@@ -1942,27 +1899,24 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        s3 = emit_load_s3(jd, iptr, REG_ITMP3);
 
-                       M_MOV(s1, REG_A0);
-                       M_MOV(s3, REG_A1);
+                       M_INTMOVE(s1, REG_A0);
+                       M_INTMOVE(s3, REG_A1);
                        disp = dseg_add_functionptr(cd, BUILTIN_canstore);
                        M_ALD(REG_ITMP3, REG_PV, disp);
                        M_JSR(REG_RA, REG_ITMP3);
                        M_NOP;
-
-/*                     M_BEQZ(REG_RESULT, 0); */
-/*                     codegen_add_arraystoreexception_ref(cd); */
-/*                     M_NOP; */
-                       emit_arraystore_check(cd, iptr, REG_RESULT);
+                       emit_exception_check(cd, iptr);
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        M_ASLL_IMM(s2, POINTERSHIFT, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_ITMP3);
-                       M_AST_INTERN(s3, REG_ITMP1, OFFSET(java_objectarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_AST_INTERN(s3, REG_ITMP1, OFFSET(java_objectarray_t, data[0]));
                        break;
 
 
@@ -1970,9 +1924,10 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_AADD(s2, s1, REG_ITMP1);
-                       M_BST(REG_ZERO, REG_ITMP1, OFFSET(java_bytearray, data[0]));
+                       /* implicit null-pointer check */
+                       M_BST(REG_ZERO, REG_ITMP1, OFFSET(java_bytearray_t, data[0]));
                        break;
 
                case ICMD_CASTORECONST:   /* ..., arrayref, index  ==> ...            */
@@ -1980,33 +1935,36 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_AADD(s2, s1, REG_ITMP1);
                        M_AADD(s2, REG_ITMP1, REG_ITMP1);
-                       M_SST(REG_ZERO, REG_ITMP1, OFFSET(java_chararray, data[0]));
+                       /* implicit null-pointer check */
+                       M_SST(REG_ZERO, REG_ITMP1, OFFSET(java_chararray_t, data[0]));
                        break;
 
                case ICMD_IASTORECONST:   /* ..., arrayref, index  ==> ...            */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 2, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
-                       M_IST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_intarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_IST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_intarray_t, data[0]));
                        break;
 
                case ICMD_LASTORECONST:   /* ..., arrayref, index  ==> ...            */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, 3, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
+                       /* implicit null-pointer check */
 #if SIZEOF_VOID_P == 8
-                       M_LST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_longarray, data[0]));
+                       M_LST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_longarray_t, data[0]));
 #else
-                       M_LST_INTERN(PACK_REGS(REG_ZERO, REG_ZERO), REG_ITMP1, OFFSET(java_longarray, data[0]));
+                       M_LST_INTERN(PACK_REGS(REG_ZERO, REG_ZERO), REG_ITMP1, OFFSET(java_longarray_t, data[0]));
 #endif
                        break;
 
@@ -2014,10 +1972,11 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       emit_array_checks(cd, iptr, s1, s2);
+                       emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_ASLL_IMM(s2, POINTERSHIFT, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
-                       M_AST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_objectarray, data[0]));
+                       /* implicit null-pointer check */
+                       M_AST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_objectarray_t, data[0]));
                        break;
 
 
@@ -2028,15 +1987,16 @@ bool codegen(jitdata *jd)
                                fieldtype = uf->fieldref->parseddesc.fd->type;
                                disp      = dseg_add_unique_address(cd, uf);
 
-                               codegen_add_patch_ref(cd, PATCHER_get_putstatic, uf, disp);
+                               patcher_add_patch_ref(jd, PATCHER_get_putstatic, uf, disp);
                        }
                        else {
                                fi        = iptr->sx.s23.s3.fmiref->p.field;
                                fieldtype = fi->type;
-                               disp      = dseg_add_address(cd, &(fi->value));
+                               disp      = dseg_add_address(cd, fi->value);
 
                                if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
-                                       codegen_add_patch_ref(cd, PATCHER_clinit, fi->class, disp);
+                                       patcher_add_patch_ref(jd, PATCHER_initialize_class,
+                                                                                 fi->class, disp);
                        }
 
                        M_ALD(REG_ITMP1, REG_PV, disp);
@@ -2077,15 +2037,16 @@ bool codegen(jitdata *jd)
                                fieldtype = uf->fieldref->parseddesc.fd->type;
                                disp      = dseg_add_unique_address(cd, uf);
 
-                               codegen_add_patch_ref(cd, PATCHER_get_putstatic, uf, disp);
+                               patcher_add_patch_ref(jd, PATCHER_get_putstatic, uf, disp);
                        }
                        else {
                                fi        = iptr->sx.s23.s3.fmiref->p.field;
                                fieldtype = fi->type;
-                               disp      = dseg_add_address(cd, &(fi->value));
+                               disp      = dseg_add_address(cd, fi->value);
 
                                if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
-                                       codegen_add_patch_ref(cd, PATCHER_clinit, fi->class, disp);
+                                       patcher_add_patch_ref(jd, PATCHER_initialize_class,
+                                                                                 fi->class, disp);
                        }
 
                        M_ALD(REG_ITMP1, REG_PV, disp);
@@ -2119,23 +2080,22 @@ bool codegen(jitdata *jd)
                        break;
 
                case ICMD_PUTSTATICCONST: /* ...  ==> ...                             */
-                                         /* val = value (in current instruction)     */
-                                         /* following NOP)                           */
 
                        if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                                uf        = iptr->sx.s23.s3.uf;
                                fieldtype = uf->fieldref->parseddesc.fd->type;
                                disp      = dseg_add_unique_address(cd, uf);
 
-                               codegen_add_patch_ref(cd, PATCHER_get_putstatic, uf, disp);
+                               patcher_add_patch_ref(jd, PATCHER_get_putstatic, uf, disp);
                        }
                        else {
                                fi        = iptr->sx.s23.s3.fmiref->p.field;
                                fieldtype = fi->type;
-                               disp      = dseg_add_address(cd, &(fi->value));
+                               disp      = dseg_add_address(cd, fi->value);
 
                                if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
-                                       codegen_add_patch_ref(cd, PATCHER_clinit, fi->class, disp);
+                                       patcher_add_patch_ref(jd, PATCHER_initialize_class,
+                                                                                 fi->class, disp);
                        }
 
                        M_ALD(REG_ITMP1, REG_PV, disp);
@@ -2170,7 +2130,7 @@ bool codegen(jitdata *jd)
                                fieldtype = uf->fieldref->parseddesc.fd->type;
                                disp      = 0;
 
-                               codegen_add_patch_ref(cd, PATCHER_get_putfield, uf, 0);
+                               patcher_add_patch_ref(jd, PATCHER_get_putfield, uf, 0);
                        }
                        else {
                                fi        = iptr->sx.s23.s3.fmiref->p.field;
@@ -2241,7 +2201,7 @@ bool codegen(jitdata *jd)
 #endif
 
                        if (INSTRUCTION_IS_UNRESOLVED(iptr))
-                               codegen_add_patch_ref(cd, PATCHER_get_putfield, uf, 0);
+                               patcher_add_patch_ref(jd, PATCHER_get_putfield, uf, 0);
 
                        switch (fieldtype) {
                        case TYPE_INT:
@@ -2268,15 +2228,14 @@ bool codegen(jitdata *jd)
                        emit_nullpointer_check(cd, iptr, s1);
 
                        if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
-                               unresolved_field *uf = iptr->sx.s23.s3.uf;
-
+                               uf        = iptr->sx.s23.s3.uf;
                                fieldtype = uf->fieldref->parseddesc.fd->type;
                                disp      = 0;
 
-                               codegen_add_patch_ref(cd, PATCHER_get_putfield, uf, 0);
+                               patcher_add_patch_ref(jd, PATCHER_get_putfield, uf, 0);
                        }
                        else {
-                               fieldinfo *fi = iptr->sx.s23.s3.fmiref->p.field;
+                               fi        = iptr->sx.s23.s3.fmiref->p.field;
                                fieldtype = fi->type;
                                disp      = fi->offset;
                        }
@@ -2312,7 +2271,7 @@ bool codegen(jitdata *jd)
                        if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                                uc = iptr->sx.s23.s2.uc;
 
-                               codegen_add_patch_ref(cd, PATCHER_athrow_areturn, uc, 0);
+                               patcher_add_patch_ref(jd, PATCHER_resolve_class, uc, 0);
                        }
 #endif /* ENABLE_VERIFIER */
 
@@ -2328,151 +2287,128 @@ bool codegen(jitdata *jd)
                case ICMD_GOTO:         /* ... ==> ...                                */
                case ICMD_RET:          /* ... ==> ...                                */
 
-                       M_BR(0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_br(cd, iptr->dst.block);
                        ALIGNCODENOP;
                        break;
 
                case ICMD_JSR:          /* ... ==> ...                                */
 
-                       M_BR(0);
-                       codegen_add_branch_ref(cd, iptr->sx.s23.s3.jsrtarget.block);
-                       M_NOP;
+                       emit_br(cd, iptr->sx.s23.s3.jsrtarget.block);
                        ALIGNCODENOP;
                        break;
                        
                case ICMD_IFNULL:       /* ..., value ==> ...                         */
+               case ICMD_IFNONNULL:
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       M_BEQZ(s1, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
-                       break;
-
-               case ICMD_IFNONNULL:    /* ..., value ==> ...                         */
-
-                       s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       M_BNEZ(s1, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bccz(cd, iptr->dst.block, iptr->opc - ICMD_IFNULL, s1, BRANCH_OPT_NONE);
                        break;
 
                case ICMD_IFEQ:         /* ..., value ==> ...                         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.i == 0) {
-                               M_BEQZ(s1, 0);
-                       else {
+                       if (iptr->sx.val.i == 0)
+                               emit_beqz(cd, iptr->dst.block, s1);
+                       else {
                                ICONST(REG_ITMP2, iptr->sx.val.i);
-                               M_BEQ(s1, REG_ITMP2, 0);
+                               emit_beq(cd, iptr->dst.block, s1, REG_ITMP2);
                        }
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IFLT:         /* ..., value ==> ...                         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.i == 0) {
-                               M_BLTZ(s1, 0);
-                       else {
-                               if ((iptr->sx.val.i >= -32768) && (iptr->sx.val.i <= 32767)) {
+                       if (iptr->sx.val.i == 0)
+                               emit_bltz(cd, iptr->dst.block, s1);
+                       else {
+                               if ((iptr->sx.val.i >= -32768) && (iptr->sx.val.i <= 32767))
                                        M_CMPLT_IMM(s1, iptr->sx.val.i, REG_ITMP1);
-                               else {
+                               else {
                                        ICONST(REG_ITMP2, iptr->sx.val.i);
                                        M_CMPLT(s1, REG_ITMP2, REG_ITMP1);
                                }
-                               M_BNEZ(REG_ITMP1, 0);
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP1);
                        }
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IFLE:         /* ..., value ==> ...                         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.i == 0) {
-                               M_BLEZ(s1, 0);
-                       else {
+                       if (iptr->sx.val.i == 0)
+                               emit_blez(cd, iptr->dst.block, s1);
+                       else {
                                if ((iptr->sx.val.i >= -32769) && (iptr->sx.val.i <= 32766)) {
                                        M_CMPLT_IMM(s1, iptr->sx.val.i + 1, REG_ITMP1);
-                                       M_BNEZ(REG_ITMP1, 0);
-                               } else {
+                                       emit_bnez(cd, iptr->dst.block, REG_ITMP1);
+                               }
+                               else {
                                        ICONST(REG_ITMP2, iptr->sx.val.i);
                                        M_CMPGT(s1, REG_ITMP2, REG_ITMP1);
-                                       M_BEQZ(REG_ITMP1, 0);
+                                       emit_beqz(cd, iptr->dst.block, REG_ITMP1);
                                }
                        }
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IFNE:         /* ..., value ==> ...                         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.i == 0) {
-                               M_BNEZ(s1, 0);
-                       else {
+                       if (iptr->sx.val.i == 0)
+                               emit_bnez(cd, iptr->dst.block, s1);
+                       else {
                                ICONST(REG_ITMP2, iptr->sx.val.i);
-                               M_BNE(s1, REG_ITMP2, 0);
+                               emit_bne(cd, iptr->dst.block, s1, REG_ITMP2);
                        }
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IFGT:         /* ..., value ==> ...                         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.i == 0) {
-                               M_BGTZ(s1, 0);
-                       else {
+                       if (iptr->sx.val.i == 0)
+                               emit_bgtz(cd, iptr->dst.block, s1);
+                       else {
                                if ((iptr->sx.val.i >= -32769) && (iptr->sx.val.i <= 32766)) {
                                        M_CMPLT_IMM(s1, iptr->sx.val.i + 1, REG_ITMP1);
-                                       M_BEQZ(REG_ITMP1, 0);
-                               } else {
+                                       emit_beqz(cd, iptr->dst.block, REG_ITMP1);
+                               }
+                               else {
                                        ICONST(REG_ITMP2, iptr->sx.val.i);
                                        M_CMPGT(s1, REG_ITMP2, REG_ITMP1);
-                                       M_BNEZ(REG_ITMP1, 0);
+                                       emit_bnez(cd, iptr->dst.block, REG_ITMP1);
                                }
                        }
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IFGE:         /* ..., value ==> ...                         */
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.i == 0) {
-                               M_BGEZ(s1, 0);
-                       else {
-                               if ((iptr->sx.val.i >= -32768) && (iptr->sx.val.i <= 32767)) {
+                       if (iptr->sx.val.i == 0)
+                               emit_bgez(cd, iptr->dst.block, s1);
+                       else {
+                               if ((iptr->sx.val.i >= -32768) && (iptr->sx.val.i <= 32767))
                                        M_CMPLT_IMM(s1, iptr->sx.val.i, REG_ITMP1);
-                               else {
+                               else {
                                        ICONST(REG_ITMP2, iptr->sx.val.i);
                                        M_CMPLT(s1, REG_ITMP2, REG_ITMP1);
                                }
-                               M_BEQZ(REG_ITMP1, 0);
+                               emit_beqz(cd, iptr->dst.block, REG_ITMP1);
                        }
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IF_LEQ:       /* ..., value ==> ...                         */
 
 #if SIZEOF_VOID_P == 8
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.l == 0) {
-                               M_BEQZ(s1, 0);
-                       else {
+                       if (iptr->sx.val.l == 0)
+                               emit_beqz(cd, iptr->dst.block, s1);
+                       else {
                                LCONST(REG_ITMP2, iptr->sx.val.l);
-                               M_BEQ(s1, REG_ITMP2, 0);
+                               emit_beq(cd, iptr->dst.block, s1, REG_ITMP2);
                        }
 #else
                        if (iptr->sx.val.l == 0) {
                                s1 = emit_load_s1(jd, iptr, REG_ITMP12_PACKED);
                                M_OR(GET_LOW_REG(s1), GET_HIGH_REG(s1), REG_ITMP3);
-                               M_BEQZ(REG_ITMP3, 0);
+                               emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                        }
                        else {
                                s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
@@ -2482,113 +2418,102 @@ bool codegen(jitdata *jd)
                                ICONST(REG_ITMP3, iptr->sx.val.l & 0xffffffff);
                                M_XOR(s1, REG_ITMP3, REG_ITMP3);
                                M_OR(REG_ITMP2, REG_ITMP3, REG_ITMP3);
-                               M_BEQZ(REG_ITMP3, 0);
+                               emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                        }
 #endif
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IF_LLT:       /* ..., value ==> ...                         */
 
 #if SIZEOF_VOID_P == 8
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.l == 0) {
-                               M_BLTZ(s1, 0);
-                       else {
-                               if ((iptr->sx.val.l >= -32768) && (iptr->sx.val.l <= 32767)) {
-                                       M_CMPLT_IMM(s1, iptr->sx.val.l, REG_ITMP1);
-                               else {
+                       if (iptr->sx.val.l == 0)
+                               emit_bltz(cd, iptr->dst.block, s1);
+                       else {
+                               if ((iptr->sx.val.l >= -32768) && (iptr->sx.val.l <= 32767))
+                                       M_CMPLT_IMM(s1, iptr->sx.val.l, REG_ITMP3);
+                               else {
                                        LCONST(REG_ITMP2, iptr->sx.val.l);
-                                       M_CMPLT(s1, REG_ITMP2, REG_ITMP1);
+                                       M_CMPLT(s1, REG_ITMP2, REG_ITMP3);
                                }
-                               M_BNEZ(REG_ITMP1, 0);
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        }
 #else
                        if (iptr->sx.val.l == 0) {
                                /* if high word is less than zero, the whole long is too */
                                s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
-                               M_BLTZ(s1, 0);
+                               emit_bltz(cd, iptr->dst.block, s1);
                        }
                        else {
                                s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                                ICONST(REG_ITMP2, iptr->sx.val.l >> 32);
                                M_CMPLT(s1, REG_ITMP2, REG_ITMP3);
-                               M_BNEZ(REG_ITMP3, 0);
-                               codegen_add_branch_ref(cd, iptr->dst.block);
-                               M_NOP;
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                                s2 = emit_load_s1_low(jd, iptr, REG_ITMP3);
-                               M_BNE(s1, REG_ITMP2, 5);
+                               M_BNE(s1, REG_ITMP2, 5); /* XXX */
                                M_NOP;
                                ICONST(REG_ITMP2, iptr->sx.val.l & 0xffffffff);
                                M_CMPULT(s2, REG_ITMP2, REG_ITMP3);
-                               M_BNEZ(REG_ITMP3, 0);
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        }
 #endif
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IF_LLE:       /* ..., value ==> ...                         */
 
 #if SIZEOF_VOID_P == 8
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.l == 0) {
-                               M_BLEZ(s1, 0);
-                       else {
+                       if (iptr->sx.val.l == 0)
+                               emit_blez(cd, iptr->dst.block, s1);
+                       else {
                                if ((iptr->sx.val.l >= -32769) && (iptr->sx.val.l <= 32766)) {
-                                       M_CMPLT_IMM(s1, iptr->sx.val.l + 1, REG_ITMP1);
-                                       M_BNEZ(REG_ITMP1, 0);
-                               } else {
+                                       M_CMPLT_IMM(s1, iptr->sx.val.l + 1, REG_ITMP2);
+                                       emit_bnez(cd, iptr->dst.block, REG_ITMP2);
+                               }
+                               else {
                                        LCONST(REG_ITMP2, iptr->sx.val.l);
-                                       M_CMPGT(s1, REG_ITMP2, REG_ITMP1);
-                                       M_BEQZ(REG_ITMP1, 0);
+                                       M_CMPGT(s1, REG_ITMP2, REG_ITMP3);
+                                       emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                                }
                        }
 #else
                        if (iptr->sx.val.l == 0) {
                                s1 = emit_load_s1(jd, iptr, REG_ITMP12_PACKED);
-                               M_BGTZ(GET_HIGH_REG(s1), 5);
-                               M_NOP;
-                               M_BLTZ(GET_HIGH_REG(s1), 0);
-                               codegen_add_branch_ref(cd, iptr->dst.block);
+                               M_BGTZ(GET_HIGH_REG(s1), 5); /* XXX */
                                M_NOP;
-                               M_BEQZ(GET_LOW_REG(s1), 0);
+                               emit_bltz(cd, iptr->dst.block, GET_HIGH_REG(s1));
+                               emit_beqz(cd, iptr->dst.block, GET_LOW_REG(s1));
                        }
                        else {
                                s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                                ICONST(REG_ITMP2, iptr->sx.val.l >> 32);
                                M_CMPLT(s1, REG_ITMP2, REG_ITMP3);
-                               M_BNEZ(REG_ITMP3, 0);
-                               codegen_add_branch_ref(cd, iptr->dst.block);
-                               M_NOP;
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                                s2 = emit_load_s1_low(jd, iptr, REG_ITMP3);
-                               M_BNE(s1, REG_ITMP2, 5);
+                               M_BNE(s1, REG_ITMP2, 5); /* XXX */
                                M_NOP;
                                ICONST(REG_ITMP2, iptr->sx.val.l & 0xffffffff);
                                M_CMPUGT(s2, REG_ITMP2, REG_ITMP3);
-                               M_BEQZ(REG_ITMP3, 0);
+                               emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                        }
 #endif
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IF_LNE:       /* ..., value ==> ...                         */
 
 #if SIZEOF_VOID_P == 8
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.l == 0) {
-                               M_BNEZ(s1, 0);
-                       else {
+                       if (iptr->sx.val.l == 0)
+                               emit_bnez(cd, iptr->dst.block, s1);
+                       else {
                                LCONST(REG_ITMP2, iptr->sx.val.l);
-                               M_BNE(s1, REG_ITMP2, 0);
+                               emit_bne(cd, iptr->dst.block, s1, REG_ITMP2);
                        }
 #else
                        if (iptr->sx.val.l == 0) {
                                s1 = emit_load_s1(jd, iptr, REG_ITMP12_PACKED);
                                M_OR(GET_LOW_REG(s1), GET_HIGH_REG(s1), REG_ITMP3);
-                               M_BNEZ(REG_ITMP3, 0);
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        }
                        else {
                                s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
@@ -2598,96 +2523,86 @@ bool codegen(jitdata *jd)
                                ICONST(REG_ITMP3, iptr->sx.val.l & 0xffffffff);
                                M_XOR(s1, REG_ITMP3, REG_ITMP3);
                                M_OR(REG_ITMP2, REG_ITMP3, REG_ITMP3);
-                               M_BNEZ(REG_ITMP3, 0);
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        }
 #endif
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IF_LGT:       /* ..., value ==> ...                         */
 
 #if SIZEOF_VOID_P == 8
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.l == 0) {
-                               M_BGTZ(s1, 0);
-                       else {
+                       if (iptr->sx.val.l == 0)
+                               emit_bgtz(cd, iptr->dst.block, s1);
+                       else {
                                if ((iptr->sx.val.l >= -32769) && (iptr->sx.val.l <= 32766)) {
-                                       M_CMPLT_IMM(s1, iptr->sx.val.l + 1, REG_ITMP1);
-                                       M_BEQZ(REG_ITMP1, 0);
-                               } else {
+                                       M_CMPLT_IMM(s1, iptr->sx.val.l + 1, REG_ITMP2);
+                                       emit_beqz(cd, iptr->dst.block, REG_ITMP2);
+                               }
+                               else {
                                        LCONST(REG_ITMP2, iptr->sx.val.l);
-                                       M_CMPGT(s1, REG_ITMP2, REG_ITMP1);
-                                       M_BNEZ(REG_ITMP1, 0);
+                                       M_CMPGT(s1, REG_ITMP2, REG_ITMP3);
+                                       emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                                }
                        }
 #else
                        if (iptr->sx.val.l == 0) {
                                s1 = emit_load_s1(jd, iptr, REG_ITMP12_PACKED);
-                               M_BGTZ(GET_HIGH_REG(s1), 0);
-                               codegen_add_branch_ref(cd, iptr->dst.block);
-                               M_NOP;
-                               M_BLTZ(GET_HIGH_REG(s1), 3);
+                               emit_bgtz(cd, iptr->dst.block, GET_HIGH_REG(s1));
+                               M_BLTZ(GET_HIGH_REG(s1), 3); /* XXX */
                                M_NOP;
-                               M_BNEZ(GET_LOW_REG(s1), 0);
+                               emit_bnez(cd, iptr->dst.block, GET_LOW_REG(s1));
                        }
                        else {
                                s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                                ICONST(REG_ITMP2, iptr->sx.val.l >> 32);
                                M_CMPGT(s1, REG_ITMP2, REG_ITMP3);
-                               M_BNEZ(REG_ITMP3, 0);
-                               codegen_add_branch_ref(cd, iptr->dst.block);
-                               M_NOP;
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                                s2 = emit_load_s1_low(jd, iptr, REG_ITMP3);
-                               M_BNE(s1, REG_ITMP2, 5);
+                               M_BNE(s1, REG_ITMP2, 5); /* XXX */
                                M_NOP;
                                ICONST(REG_ITMP2, iptr->sx.val.l & 0xffffffff);
                                M_CMPUGT(s2, REG_ITMP2, REG_ITMP3);
-                               M_BNEZ(REG_ITMP3, 0);
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        }
 #endif
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IF_LGE:       /* ..., value ==> ...                         */
 
 #if SIZEOF_VOID_P == 8
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
-                       if (iptr->sx.val.l == 0) {
-                               M_BGEZ(s1, 0);
-                       else {
+                       if (iptr->sx.val.l == 0)
+                               emit_bgez(cd, iptr->dst.block, s1);
+                       else {
                                if ((iptr->sx.val.l >= -32768) && (iptr->sx.val.l <= 32767)) {
-                                       M_CMPLT_IMM(s1, iptr->sx.val.l, REG_ITMP1);
-                               } else {
+                                       M_CMPLT_IMM(s1, iptr->sx.val.l, REG_ITMP3);
+                               }
+                               else {
                                        LCONST(REG_ITMP2, iptr->sx.val.l);
-                                       M_CMPLT(s1, REG_ITMP2, REG_ITMP1);
+                                       M_CMPLT(s1, REG_ITMP2, REG_ITMP3);
                                }
-                               M_BEQZ(REG_ITMP1, 0);
+                               emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                        }
 #else
                        if (iptr->sx.val.l == 0) {
                                /* if high word is greater equal zero, the whole long is too */
                                s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
-                               M_BGEZ(s1, 0);
+                               emit_bgez(cd, iptr->dst.block, s1);
                        }
                        else {
                                s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                                ICONST(REG_ITMP2, iptr->sx.val.l >> 32);
                                M_CMPGT(s1, REG_ITMP2, REG_ITMP3);
-                               M_BNEZ(REG_ITMP3, 0);
-                               codegen_add_branch_ref(cd, iptr->dst.block);
-                               M_NOP;
+                               emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                                s2 = emit_load_s1_low(jd, iptr, REG_ITMP3);
-                               M_BNE(s1, REG_ITMP2, 5);
+                               M_BNE(s1, REG_ITMP2, 5); /* XXX */
                                M_NOP;
                                ICONST(REG_ITMP2, iptr->sx.val.l & 0xffffffff);
                                M_CMPULT(s2, REG_ITMP2, REG_ITMP3);
-                               M_BEQZ(REG_ITMP3, 0);
+                               emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                        }
 #endif
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
                        break;
 
                case ICMD_IF_ICMPEQ:    /* ..., value, value ==> ...                  */
@@ -2698,9 +2613,7 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       M_BEQ(s1, s2, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_beq(cd, iptr->dst.block, s1, s2);
                        break;
 
 #if SIZEOF_VOID_P == 4
@@ -2709,13 +2622,11 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
-                       M_BNE(s1, s2, 3);
+                       M_BNE(s1, s2, 3); /* XXX TWISTI: uff, that is a problem */
                        M_NOP;
                        s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
-                       M_BEQ(s1, s2, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_beq(cd, iptr->dst.block, s1, s2);
                        break;
 #endif
 
@@ -2727,24 +2638,19 @@ bool codegen(jitdata *jd)
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
-                       M_BNE(s1, s2, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bne(cd, iptr->dst.block, s1, s2);
                        break;
 
 #if SIZEOF_VOID_P == 4
                case ICMD_IF_LCMPNE:    /* ..., value, value ==> ...                  */
 
+                       /* TODO: could be optimized (XOR or SUB) */
                        s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
-                       M_BNE(s1, s2, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bne(cd, iptr->dst.block, s1, s2);
                        s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
-                       M_BNE(s1, s2, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bne(cd, iptr->dst.block, s1, s2);
                        break;
 #endif
 
@@ -2756,9 +2662,7 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        M_CMPLT(s1, s2, REG_ITMP3);
-                       M_BNEZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        break;
 
 #if SIZEOF_VOID_P == 4
@@ -2767,19 +2671,15 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                        M_CMPLT(s1, s2, REG_ITMP3);
-                       M_BNEZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        M_CMPGT(s1, s2, REG_ITMP3);
                        /* load low-bits before the branch, so we know the distance */
                        s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
-                       M_BNEZ(REG_ITMP3, 4);
+                       M_BNEZ(REG_ITMP3, 4); /* XXX */
                        M_NOP;
                        M_CMPULT(s1, s2, REG_ITMP3);
-                       M_BNEZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        break;
 #endif
 
@@ -2791,9 +2691,7 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        M_CMPGT(s1, s2, REG_ITMP3);
-                       M_BNEZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        break;
 
 #if SIZEOF_VOID_P == 4
@@ -2802,19 +2700,15 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                        M_CMPGT(s1, s2, REG_ITMP3);
-                       M_BNEZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        M_CMPLT(s1, s2, REG_ITMP3);
                        /* load low-bits before the branch, so we know the distance */
                        s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
-                       M_BNEZ(REG_ITMP3, 4);
+                       M_BNEZ(REG_ITMP3, 4); /* XXX */
                        M_NOP;
                        M_CMPUGT(s1, s2, REG_ITMP3);
-                       M_BNEZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        break;
 #endif
 
@@ -2826,9 +2720,7 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        M_CMPGT(s1, s2, REG_ITMP3);
-                       M_BEQZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                        break;
 
 #if SIZEOF_VOID_P == 4
@@ -2837,19 +2729,15 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                        M_CMPLT(s1, s2, REG_ITMP3);
-                       M_BNEZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        M_CMPGT(s1, s2, REG_ITMP3);
                        /* load low-bits before the branch, so we know the distance */
                        s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
-                       M_BNEZ(REG_ITMP3, 4);
+                       M_BNEZ(REG_ITMP3, 4); /* XXX */
                        M_NOP;
                        M_CMPUGT(s1, s2, REG_ITMP3);
-                       M_BEQZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                        break;
 #endif
 
@@ -2861,9 +2749,7 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
                        M_CMPLT(s1, s2, REG_ITMP3);
-                       M_BEQZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                        break;
 
 #if SIZEOF_VOID_P == 4
@@ -2872,19 +2758,15 @@ bool codegen(jitdata *jd)
                        s1 = emit_load_s1_high(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_high(jd, iptr, REG_ITMP2);
                        M_CMPGT(s1, s2, REG_ITMP3);
-                       M_BNEZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_bnez(cd, iptr->dst.block, REG_ITMP3);
                        M_CMPLT(s1, s2, REG_ITMP3);
                        /* load low-bits before the branch, so we know the distance */
                        s1 = emit_load_s1_low(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2_low(jd, iptr, REG_ITMP2);
-                       M_BNEZ(REG_ITMP3, 4);
+                       M_BNEZ(REG_ITMP3, 4); /* XXX */
                        M_NOP;
                        M_CMPULT(s1, s2, REG_ITMP3);
-                       M_BEQZ(REG_ITMP3, 0);
-                       codegen_add_branch_ref(cd, iptr->dst.block);
-                       M_NOP;
+                       emit_beqz(cd, iptr->dst.block, REG_ITMP3);
                        break;
 #endif
 
@@ -2908,7 +2790,7 @@ bool codegen(jitdata *jd)
                        if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
                                uc = iptr->sx.s23.s2.uc;
 
-                               codegen_add_patch_ref(cd, PATCHER_athrow_areturn, uc, 0);
+                               patcher_add_patch_ref(jd, PATCHER_resolve_class, uc, 0);
                        }
 #endif /* ENABLE_VERIFIER */
                        goto nowperformreturn;
@@ -3080,9 +2962,7 @@ nowperformreturn:
                        /* range check */
 
                        M_CMPULT_IMM(REG_ITMP1, i, REG_ITMP2);
-                       M_BEQZ(REG_ITMP2, 0);
-                       codegen_add_branch_ref(cd, table[0].block); /* default target */
-                       M_ASLL_IMM(REG_ITMP1, POINTERSHIFT, REG_ITMP1);     /* delay slot */
+                       emit_beqz(cd, table[0].block, REG_ITMP2);
 
                        /* build jump table top down and use address of lowest entry */
 
@@ -3096,6 +2976,7 @@ nowperformreturn:
 
                        /* length of dataseg after last dseg_add_target is used by load */
 
+                       M_ASLL_IMM(REG_ITMP1, POINTERSHIFT, REG_ITMP1);
                        M_AADD(REG_ITMP1, REG_PV, REG_ITMP2);
                        M_ALD(REG_ITMP2, REG_ITMP2, -(cd->dseglen));
                        M_JMP(REG_ITMP2);
@@ -3118,15 +2999,11 @@ nowperformreturn:
 
                        while (--i >= 0) {
                                ICONST(REG_ITMP2, lookup->value);
-                               M_BEQ(s1, REG_ITMP2, 0);
-                               codegen_add_branch_ref(cd, lookup->target.block); 
-                               M_NOP;
+                               emit_beq(cd, lookup->target.block, s1, REG_ITMP2);
                                ++lookup;
                        }
 
-                       M_BR(0);
-                       codegen_add_branch_ref(cd, iptr->sx.s23.s3.lookupdefault.block);
-                       M_NOP;
+                       emit_br(cd, iptr->sx.s23.s3.lookupdefault.block);
                        ALIGNCODENOP;
                        break;
                        }
@@ -3166,6 +3043,7 @@ gen_method:
 
                        for (s3 = s3 - 1; s3 >= 0; s3--) {
                                var = VAR(iptr->sx.s23.s2.args[s3]);
+                               d   = md->params[s3].regoff;
 
                                if (var->flags & PREALLOC)
                                        continue;
@@ -3173,85 +3051,48 @@ gen_method:
                                if (IS_INT_LNG_TYPE(var->type)) {
 #if SIZEOF_VOID_P == 8
                                        if (!md->params[s3].inmemory) {
-                                               s1 = rd->argintregs[md->params[s3].regoff];
-                                               d = emit_load(jd, iptr, var, s1);
-                                               M_INTMOVE(d, s1);
+                                               s1 = emit_load(jd, iptr, var, d);
+                                               M_INTMOVE(s1, d);
                                        }
                                        else  {
-                                               d = emit_load(jd, iptr, var, REG_ITMP1);
-                                               M_LST(d, REG_SP, md->params[s3].regoff * 8);
+                                               s1 = emit_load(jd, iptr, var, REG_ITMP1);
+                                               M_LST(s1, REG_SP, d);
                                        }
 #else
                                        if (!md->params[s3].inmemory) {
-                                               if (IS_2_WORD_TYPE(var->type)) {
-                                                       s1 = md->params[s3].regoff;
-                                                       s1 = PACK_REGS(rd->argintregs[GET_LOW_REG(s1)],
-                                                                                  rd->argintregs[GET_HIGH_REG(s1)]);
-                                                       d = emit_load(jd, iptr, var, s1);
-                                                       M_LNGMOVE(d, s1);
-                                               }
-                                               else {
-                                                       s1 = rd->argintregs[md->params[s3].regoff];
-                                                       d = emit_load(jd, iptr, var, s1);
-                                                       M_INTMOVE(d, s1);
-                                               }
+                                               s1 = emit_load(jd, iptr, var, d);
+
+                                               if (IS_2_WORD_TYPE(var->type))
+                                                       M_LNGMOVE(s1, d);
+                                               else
+                                                       M_INTMOVE(s1, d);
                                        }
                                        else {
                                                if (IS_2_WORD_TYPE(var->type)) {
-                                                       d = emit_load(jd, iptr, var, REG_ITMP12_PACKED);
-                                                       M_LST(d, REG_SP, md->params[s3].regoff * 8);
+                                                       s1 = emit_load(jd, iptr, var, REG_ITMP12_PACKED);
+                                                       M_LST(s1, REG_SP, d);
                                                }
                                                else {
-                                                       d = emit_load(jd, iptr, var, REG_ITMP1);
-                                                       M_IST(d, REG_SP, md->params[s3].regoff * 8);
+                                                       s1 = emit_load(jd, iptr, var, REG_ITMP1);
+                                                       M_IST(s1, REG_SP, d);
                                                }
                                        }
 #endif
                                }
                                else {
                                        if (!md->params[s3].inmemory) {
-#if SIZEOF_VOID_P == 8
-                                               s1 = rd->argfltregs[md->params[s3].regoff];
-                                               d = emit_load(jd, iptr, var, s1);
+                                               s1 = emit_load(jd, iptr, var, d);
                                                if (IS_2_WORD_TYPE(var->type))
-                                                       M_DMOV(d, s1);
+                                                       M_DBLMOVE(s1, d);
                                                else
-                                                       M_FMOV(d, s1);
-#else
-                                               if ((s3 == 0) ||
-                                                       ((s3 == 1) && IS_FLT_DBL_TYPE(md->paramtypes[0].type))) {
-                                                       s1 = rd->argfltregs[md->params[s3].regoff];
-                                                       d = emit_load(jd, iptr, var, s1);
-                                                       if (IS_2_WORD_TYPE(var->type))
-                                                               M_DBLMOVE(d, s1);
-                                                       else
-                                                               M_FLTMOVE(d, s1);
-                                               }
-                                               else {
-                                                       if (IS_2_WORD_TYPE(var->type)) {
-                                                               s1 = md->params[s3].regoff;
-                                                               s2 = PACK_REGS(rd->argintregs[GET_LOW_REG(s1)],
-                                                                                          rd->argintregs[GET_HIGH_REG(s1)]);
-                                                               d = emit_load(jd, iptr, var, REG_FTMP1);
-                                                               M_MFC1(GET_LOW_REG(s2), d);
-                                                               M_MFC1(GET_HIGH_REG(s2), d + 1);
-                                                               M_NOP;
-                                                       }
-                                                       else {
-                                                               s1 = rd->argintregs[md->params[s3].regoff];
-                                                               d = emit_load(jd, iptr, var, s1);
-                                                               M_MFC1(s1, d);
-                                                               M_NOP;
-                                                       }
-                                               }       
-#endif
+                                                       M_FLTMOVE(s1, d);
                                        }
                                        else {
-                                               d = emit_load(jd, iptr, var, REG_FTMP1);
+                                               s1 = emit_load(jd, iptr, var, REG_FTMP1);
                                                if (IS_2_WORD_TYPE(var->type))
-                                                       M_DST(d, REG_SP, md->params[s3].regoff * 8);
+                                                       M_DST(s1, REG_SP, d);
                                                else
-                                                       M_FST(d, REG_SP, md->params[s3].regoff * 8);
+                                                       M_FST(s1, REG_SP, d);
                                        }
                                }
                        }
@@ -3262,44 +3103,50 @@ gen_method:
 
                                M_ALD(REG_ITMP3, REG_PV, disp);  /* built-in-function pointer */
 
+                               /* generate the actual call */
+
                                /* TWISTI: i actually don't know the reason for using
                                   REG_ITMP3 here instead of REG_PV. */
-                               s1 = REG_ITMP3;
-                               break;
 
-                       case ICMD_INVOKESPECIAL:
-/*                             emit_nullpointer_check(cd, REG_A0); */
-                               M_BNEZ(REG_A0, 6);
+                               M_JSR(REG_RA, REG_ITMP3);
                                M_NOP;
+                               REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
+                               disp = (s4) (cd->mcodeptr - cd->mcodebase);
+                               M_LDA(REG_PV, REG_RA, -disp);
 
-                               M_LUI(REG_ITMP3, 0);
-                               M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
-                               codegen_add_nullpointerexception_ref(cd);
-                               M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
-                               M_JMP(REG_ITMP3);
-                               M_NOP;
+                               emit_exception_check(cd, iptr);
+                               break;
 
+                       case ICMD_INVOKESPECIAL:
+                               emit_nullpointer_check(cd, iptr, REG_A0);
                                /* fall through */
 
                        case ICMD_INVOKESTATIC:
                                if (lm == NULL) {
                                        disp = dseg_add_unique_address(cd, um);
 
-                                       codegen_add_patch_ref(cd, PATCHER_invokestatic_special, um,
+                                       patcher_add_patch_ref(jd, PATCHER_invokestatic_special, um,
                                                                                  disp);
                                }
                                else
                                        disp = dseg_add_address(cd, lm->stubroutine);
 
                                M_ALD(REG_PV, REG_PV, disp);          /* method pointer in pv */
-                               s1 = REG_PV;
+
+                               /* generate the actual call */
+
+                               M_JSR(REG_RA, REG_PV);
+                               M_NOP;
+                               REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
+                               disp = (s4) (cd->mcodeptr - cd->mcodebase);
+                               M_LDA(REG_PV, REG_RA, -disp);
                                break;
 
                        case ICMD_INVOKEVIRTUAL:
                                emit_nullpointer_check(cd, iptr, REG_A0);
 
                                if (lm == NULL) {
-                                       codegen_add_patch_ref(cd, PATCHER_invokevirtual, um, 0);
+                                       patcher_add_patch_ref(jd, PATCHER_invokevirtual, um, 0);
 
                                        s1 = 0;
                                }
@@ -3307,16 +3154,24 @@ gen_method:
                                        s1 = OFFSET(vftbl_t, table[0]) +
                                                sizeof(methodptr) * lm->vftblindex;
 
-                               M_ALD(REG_METHODPTR, REG_A0, OFFSET(java_objectheader, vftbl));
+                               /* implicit null-pointer check */
+                               M_ALD(REG_METHODPTR, REG_A0, OFFSET(java_object_t, vftbl));
                                M_ALD(REG_PV, REG_METHODPTR, s1);
-                               s1 = REG_PV;
+
+                               /* generate the actual call */
+
+                               M_JSR(REG_RA, REG_PV);
+                               M_NOP;
+                               REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
+                               disp = (s4) (cd->mcodeptr - cd->mcodebase);
+                               M_LDA(REG_PV, REG_RA, -disp);
                                break;
 
                        case ICMD_INVOKEINTERFACE:
                                emit_nullpointer_check(cd, iptr, REG_A0);
 
                                if (lm == NULL) {
-                                       codegen_add_patch_ref(cd, PATCHER_invokeinterface, um, 0);
+                                       patcher_add_patch_ref(jd, PATCHER_invokeinterface, um, 0);
 
                                        s1 = 0;
                                        s2 = 0;
@@ -3328,24 +3183,20 @@ gen_method:
                                        s2 = sizeof(methodptr) * (lm - lm->class->methods);
                                }
 
-                               M_ALD(REG_METHODPTR, REG_A0, OFFSET(java_objectheader, vftbl));
+                               /* implicit null-pointer check */
+                               M_ALD(REG_METHODPTR, REG_A0, OFFSET(java_object_t, vftbl));
                                M_ALD(REG_METHODPTR, REG_METHODPTR, s1);
                                M_ALD(REG_PV, REG_METHODPTR, s2);
-                               s1 = REG_PV;
-                               break;
-                       }
-
-                       /* generate the actual call */
-
-                       M_JSR(REG_RA, s1);
-                       M_NOP;
-                       REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
-                       disp = (s4) (cd->mcodeptr - cd->mcodebase);
-                       M_LDA(REG_PV, REG_RA, -disp);
 
-                       /* actually only used for ICMD_BUILTIN */
+                               /* generate the actual call */
 
-                       emit_exception_check(cd, iptr);
+                               M_JSR(REG_RA, REG_PV);
+                               M_NOP;
+                               REPLACEMENT_POINT_INVOKE_RETURN(cd, iptr);
+                               disp = (s4) (cd->mcodeptr - cd->mcodebase);
+                               M_LDA(REG_PV, REG_RA, -disp);
+                               break;
+                       }
 
                        /* store return value */
 
@@ -3380,20 +3231,6 @@ gen_method:
 
 
                case ICMD_CHECKCAST:  /* ..., objectref ==> ..., objectref            */
-                                     /* val.a: (classinfo*) superclass               */
-
-                       /*  superclass is an interface:
-                        *
-                        *  OK if ((sub == NULL) ||
-                        *         (sub->vftbl->interfacetablelength > super->index) &&
-                        *         (sub->vftbl->interfacetable[-super->index] != NULL));
-                        *
-                        *  superclass is a class:
-                        *
-                        *  OK if ((sub == NULL) || (0
-                        *         <= (sub->vftbl->baseval - super->vftbl->baseval) <=
-                        *         super->vftbl->diffvall));
-                        */
 
                        if (!(iptr->flags.bits & INS_FLAG_ARRAY)) {
                                classinfo *super;
@@ -3404,47 +3241,29 @@ gen_method:
                                        superindex = 0;
                                }
                                else {
-                                       super = iptr->sx.s23.s3.c.cls;
+                                       super      = iptr->sx.s23.s3.c.cls;
                                        superindex = super->index;
                                }
                        
-#if defined(ENABLE_THREADS)
-                               codegen_threadcritrestart(cd, cd->mcodeptr - cd->mcodebase);
-#endif
+                               if ((super == NULL) || !(super->flags & ACC_INTERFACE))
+                                       CODEGEN_CRITICAL_SECTION_NEW;
 
                                s1 = emit_load_s1(jd, iptr, REG_ITMP1);
 
-                               /* calculate interface checkcast code size */
-
-/*                             s2 = 3 + 2 + 1 + 2; */
-                               s2 = 3 + 7 + 1 + 7;
-                               if (super == NULL)
-                                       s2 += (opt_shownops ? PATCHER_CALL_INSTRUCTIONS : 0);
-
-                               /* calculate class checkcast code size */
-
-/*                             s3 = 2 + 1 + 4 + 1 + 2 /\* 10 + (s1 == REG_ITMP1) *\/; */
-                               s3 = 2 + 1 + 4 + 1 + 7;
-                               if (super == NULL)
-                                       s3 += (opt_shownops ? PATCHER_CALL_INSTRUCTIONS : 0);
-
                                /* if class is not resolved, check which code to call */
 
                                if (super == NULL) {
-                                       M_BEQZ(s1, 5 + (opt_shownops ? PATCHER_CALL_INSTRUCTIONS : 0) + s2 + 2 + s3);
-                                       M_NOP;
+                                       emit_label_beqz(cd, BRANCH_LABEL_1, s1);
 
                                        cr   = iptr->sx.s23.s3.c.ref;
                                        disp = dseg_add_unique_s4(cd, 0);         /* super->flags */
 
-                                       codegen_add_patch_ref(cd, PATCHER_checkcast_instanceof_flags,
+                                       patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_flags,
                                                                                  cr, disp);
 
-                                       /* XXX TWISTI M_ILD can be 2 instructions long (jump offset) */
                                        M_ILD(REG_ITMP2, REG_PV, disp);
                                        M_AND_IMM(REG_ITMP2, ACC_INTERFACE, REG_ITMP2);
-                                       M_BEQZ(REG_ITMP2, 1 + s2 + 2);
-                                       M_NOP;
+                                       emit_label_beqz(cd, BRANCH_LABEL_2, REG_ITMP2);
                                }
 
                                /* interface checkcast code */
@@ -3453,15 +3272,14 @@ gen_method:
                                        if (super == NULL) {
                                                cr = iptr->sx.s23.s3.c.ref;
 
-                                               codegen_add_patch_ref(cd, PATCHER_checkcast_interface,
+                                               patcher_add_patch_ref(jd, PATCHER_checkcast_interface,
                                                                                          cr, 0);
                                        }
                                        else {
-                                               M_BEQZ(s1, 1 + s2);
-                                               M_NOP;
+                                               emit_label_beqz(cd, BRANCH_LABEL_3, s1);
                                        }
 
-                                       M_ALD(REG_ITMP2, s1, OFFSET(java_objectheader, vftbl));
+                                       M_ALD(REG_ITMP2, s1, OFFSET(java_object_t, vftbl));
                                        M_ILD(REG_ITMP3, REG_ITMP2,
                                                  OFFSET(vftbl_t, interfacetablelength));
                                        M_IADD_IMM(REG_ITMP3, -superindex, REG_ITMP3);
@@ -3472,35 +3290,36 @@ gen_method:
                                                  superindex * sizeof(methodptr*));
                                        emit_classcast_check(cd, iptr, ICMD_IFEQ, REG_ITMP3, s1);
 
-                                       if (super == NULL) {
-                                               M_BR(1 + s3);
-                                               M_NOP;
-                                       }
+                                       if (super == NULL)
+                                               emit_label_br(cd, BRANCH_LABEL_4);
+                                       else
+                                               emit_label(cd, BRANCH_LABEL_3);
                                }
 
                                /* class checkcast code */
 
                                if ((super == NULL) || !(super->flags & ACC_INTERFACE)) {
                                        if (super == NULL) {
+                                               emit_label(cd, BRANCH_LABEL_2);
+
                                                cr   = iptr->sx.s23.s3.c.ref;
                                                disp = dseg_add_unique_address(cd, NULL);
 
-                                               codegen_add_patch_ref(cd,
-                                                                                         PATCHER_checkcast_instanceof_class,
+                                               patcher_add_patch_ref(jd,
+                                                                                         PATCHER_resolve_classref_to_vftbl,
                                                                                          cr, disp);
                                        }
                                        else {
                                                disp = dseg_add_address(cd, super->vftbl);
 
-                                               M_BEQZ(s1, 1 + s3);
-                                               M_NOP;
+                                               emit_label_beqz(cd, BRANCH_LABEL_5, s1);
                                        }
 
-                                       M_ALD(REG_ITMP2, s1, OFFSET(java_objectheader, vftbl));
+                                       M_ALD(REG_ITMP2, s1, OFFSET(java_object_t, vftbl));
                                        M_ALD(REG_ITMP3, REG_PV, disp);
-#if defined(ENABLE_THREADS)
-                                       codegen_threadcritstart(cd, cd->mcodeptr - cd->mcodebase);
-#endif
+
+                                       CODEGEN_CRITICAL_SECTION_START;
+
                                        M_ILD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, baseval));
                                        /*                              if (s1 != REG_ITMP1) { */
                                        /*                                      M_ILD(REG_ITMP1, REG_ITMP3, OFFSET(vftbl_t, baseval)); */
@@ -3514,12 +3333,20 @@ gen_method:
                                        M_ISUB(REG_ITMP2, REG_ITMP3, REG_ITMP2); 
                                        M_ALD(REG_ITMP3, REG_PV, disp);
                                        M_ILD(REG_ITMP3, REG_ITMP3, OFFSET(vftbl_t, diffval));
-#if defined(ENABLE_THREADS)
-                                       codegen_threadcritstop(cd, cd->mcodeptr - cd->mcodebase);
-#endif
+
+                                       CODEGEN_CRITICAL_SECTION_END;
+
                                        /*                              } */
                                        M_CMPULT(REG_ITMP3, REG_ITMP2, REG_ITMP3);
                                        emit_classcast_check(cd, iptr, ICMD_IFNE, REG_ITMP3, s1);
+
+                                       if (super != NULL)
+                                               emit_label(cd, BRANCH_LABEL_5);
+                               }
+
+                               if (super == NULL) {
+                                       emit_label(cd, BRANCH_LABEL_1);
+                                       emit_label(cd, BRANCH_LABEL_4);
                                }
 
                                d = codegen_reg_of_dst(jd, iptr, s1);
@@ -3532,11 +3359,13 @@ gen_method:
                                        cr   = iptr->sx.s23.s3.c.ref;
                                        disp = dseg_add_unique_address(cd, NULL);
 
-                                       codegen_add_patch_ref(cd, PATCHER_builtin_arraycheckcast,
+                                       patcher_add_patch_ref(jd,
+                                                                                 PATCHER_resolve_classref_to_classinfo,
                                                                                  cr, disp);
                                }
-                               else
+                               else {
                                        disp = dseg_add_address(cd, iptr->sx.s23.s3.c.cls);
+                               }
 
                                M_ALD(REG_A1, REG_PV, disp);
                                disp = dseg_add_functionptr(cd, BUILTIN_arraycheckcast);
@@ -3555,20 +3384,6 @@ gen_method:
                        break;
 
                case ICMD_INSTANCEOF: /* ..., objectref ==> ..., intresult            */
-                                     /* val.a: (classinfo*) superclass               */
-
-                       /*  superclass is an interface:
-                        *
-                        *  return (sub != NULL) &&
-                        *         (sub->vftbl->interfacetablelength > super->index) &&
-                        *         (sub->vftbl->interfacetable[-super->index] != NULL);
-                        *
-                        *  superclass is a class:
-                        *
-                        *  return ((sub != NULL) && (0
-                        *          <= (sub->vftbl->baseval - super->vftbl->baseval) <=
-                        *          super->vftbl->diffvall));
-                        */
 
                        {
                        classinfo *super;
@@ -3585,48 +3400,33 @@ gen_method:
                                superindex = super->index;
                        }
                        
-#if defined(ENABLE_THREADS)
-                       codegen_threadcritrestart(cd, cd->mcodeptr - cd->mcodebase);
-#endif
+                       if ((super == NULL) || !(super->flags & ACC_INTERFACE))
+                               CODEGEN_CRITICAL_SECTION_NEW;
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
+
                        if (s1 == d) {
                                M_MOV(s1, REG_ITMP1);
                                s1 = REG_ITMP1;
                        }
 
-                       /* calculate interface instanceof code size */
-
-                       s2 = 7;
-                       if (super == NULL)
-                               s2 += (opt_shownops ? PATCHER_CALL_INSTRUCTIONS : 0);
-
-                       /* calculate class instanceof code size */
-
-                       s3 = 8;
-                       if (super == NULL)
-                               s3 += (opt_shownops ? PATCHER_CALL_INSTRUCTIONS : 0);
-
                        M_CLR(d);
 
                        /* if class is not resolved, check which code to call */
 
                        if (super == NULL) {
-                               M_BEQZ(s1, 5 + (opt_shownops ? PATCHER_CALL_INSTRUCTIONS : 0) + s2 + 2 + s3);
-                               M_NOP;
+                               emit_label_beqz(cd, BRANCH_LABEL_1, s1);
 
                                cr   = iptr->sx.s23.s3.c.ref;
                                disp = dseg_add_unique_s4(cd, 0);             /* super->flags */
 
-                               codegen_add_patch_ref(cd, PATCHER_checkcast_instanceof_flags,
+                               patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_flags,
                                                                          cr, disp);
 
-                               /* XXX TWISTI M_ILD can be 2 instructions long (jump offset) */
                                M_ILD(REG_ITMP3, REG_PV, disp);
                                M_AND_IMM(REG_ITMP3, ACC_INTERFACE, REG_ITMP3);
-                               M_BEQZ(REG_ITMP3, 1 + s2 + 2);
-                               M_NOP;
+                               emit_label_beqz(cd, BRANCH_LABEL_2, REG_ITMP3);
                        }
 
                        /* interface instanceof code */
@@ -3635,15 +3435,14 @@ gen_method:
                                if (super == NULL) {
                                        cr = iptr->sx.s23.s3.c.ref;
 
-                                       codegen_add_patch_ref(cd, PATCHER_instanceof_interface,
+                                       patcher_add_patch_ref(jd, PATCHER_instanceof_interface,
                                                                                  cr, 0);
                                }
                                else {
-                                       M_BEQZ(s1, 1 + s2);
-                                       M_NOP;
+                                       emit_label_beqz(cd, BRANCH_LABEL_3, s1);
                                }
 
-                               M_ALD(REG_ITMP1, s1, OFFSET(java_objectheader, vftbl));
+                               M_ALD(REG_ITMP1, s1, OFFSET(java_object_t, vftbl));
                                M_ILD(REG_ITMP3, REG_ITMP1,
                                          OFFSET(vftbl_t, interfacetablelength));
                                M_IADD_IMM(REG_ITMP3, -superindex, REG_ITMP3);
@@ -3654,44 +3453,54 @@ gen_method:
                                          superindex * sizeof(methodptr*));
                                M_CMPULT(REG_ZERO, REG_ITMP1, d);      /* REG_ITMP1 != 0  */
 
-                               if (super == NULL) {
-                                       M_BR(1 + s3);
-                                       M_NOP;
-                               }
+                               if (super == NULL)
+                                       emit_label_br(cd, BRANCH_LABEL_4);
+                               else
+                                       emit_label(cd, BRANCH_LABEL_3);
                        }
 
                        /* class instanceof code */
 
                        if ((super == NULL) || !(super->flags & ACC_INTERFACE)) {
                                if (super == NULL) {
+                                       emit_label(cd, BRANCH_LABEL_2);
+
                                        cr   = iptr->sx.s23.s3.c.ref;
                                        disp = dseg_add_unique_address(cd, NULL);
 
-                                       codegen_add_patch_ref(cd, PATCHER_checkcast_instanceof_class,
+                                       patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_vftbl,
                                                                                  cr, disp);
                                }
                                else {
                                        disp = dseg_add_address(cd, super->vftbl);
 
-                                       M_BEQZ(s1, 1 + s3);
-                                       M_NOP;
+                                       emit_label_beqz(cd, BRANCH_LABEL_5, s1);
                                }
 
-                               M_ALD(REG_ITMP1, s1, OFFSET(java_objectheader, vftbl));
+                               M_ALD(REG_ITMP1, s1, OFFSET(java_object_t, vftbl));
                                M_ALD(REG_ITMP2, REG_PV, disp);
-#if defined(ENABLE_THREADS)
-                               codegen_threadcritstart(cd, cd->mcodeptr - cd->mcodebase);
-#endif
+
+                               CODEGEN_CRITICAL_SECTION_START;
+
                                M_ILD(REG_ITMP1, REG_ITMP1, OFFSET(vftbl_t, baseval));
                                M_ILD(REG_ITMP3, REG_ITMP2, OFFSET(vftbl_t, baseval));
                                M_ILD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, diffval));
-#if defined(ENABLE_THREADS)
-                               codegen_threadcritstop(cd, cd->mcodeptr - cd->mcodebase);
-#endif
+
+                               CODEGEN_CRITICAL_SECTION_END;
+
                                M_ISUB(REG_ITMP1, REG_ITMP3, REG_ITMP1); 
                                M_CMPULT(REG_ITMP2, REG_ITMP1, d);
                                M_XOR_IMM(d, 1, d);
+
+                               if (super != NULL)
+                                       emit_label(cd, BRANCH_LABEL_5);
+                       }
+
+                       if (super == NULL) {
+                               emit_label(cd, BRANCH_LABEL_1);
+                               emit_label(cd, BRANCH_LABEL_4);
                        }
+
                        emit_store_dst(jd, iptr, d);
                        }
                        break;
@@ -3728,11 +3537,12 @@ gen_method:
                                cr   = iptr->sx.s23.s3.c.ref;
                                disp = dseg_add_unique_address(cd, NULL);
 
-                               codegen_add_patch_ref(cd, PATCHER_builtin_multianewarray,
+                               patcher_add_patch_ref(jd, PATCHER_resolve_classref_to_classinfo,
                                                                          cr, disp);
                        }
-                       else
+                       else {
                                disp = dseg_add_address(cd, iptr->sx.s23.s3.c.cls);
+                       }
 
                        /* a1 = arraydescriptor */
 
@@ -3785,13 +3595,9 @@ gen_method:
 
        dseg_createlinenumbertable(cd);
 
-       /* generate exception and patcher stubs */
-
-       emit_exception_stubs(jd);
-       emit_patcher_stubs(jd);
-       REPLACEMENT_EMIT_STUBS(jd);
+       /* generate traps */
 
-       codegen_finish(jd);
+       emit_patcher_traps(jd);
 
        /* everything's ok */
 
@@ -3799,94 +3605,54 @@ gen_method:
 }
 
 
-/* createcompilerstub **********************************************************
+/* codegen_emit_stub_compiler **************************************************
 
-   Creates a stub routine which calls the compiler.
+   Emits a stub routine which calls the compiler.
        
 *******************************************************************************/
 
-#define COMPILERSTUB_DATASIZE    3 * SIZEOF_VOID_P
-#define COMPILERSTUB_CODESIZE    4 * 4
-
-#define COMPILERSTUB_SIZE        COMPILERSTUB_DATASIZE + COMPILERSTUB_CODESIZE
-
-
-u1 *createcompilerstub(methodinfo *m)
+void codegen_emit_stub_compiler(jitdata *jd)
 {
-       u1          *s;                     /* memory to hold the stub            */
-       ptrint      *d;
-       codeinfo    *code;
+       methodinfo  *m;
        codegendata *cd;
-       s4           dumpsize;
-
-       s = CNEW(u1, COMPILERSTUB_SIZE);
-
-       /* set data pointer and code pointer */
 
-       d = (ptrint *) s;
-       s = s + COMPILERSTUB_DATASIZE;
-
-       /* mark start of dump memory area */
-
-       dumpsize = dump_size();
-
-       cd = DNEW(codegendata);
-       cd->mcodeptr = s;
-
-       /* Store the codeinfo pointer in the same place as in the
-          methodheader for compiled methods. */
+       /* get required compiler data */
 
-       code = code_codeinfo_new(m);
+       m  = jd->m;
+       cd = jd->cd;
 
-       d[0] = (ptrint) asm_call_jit_compiler;
-       d[1] = (ptrint) m;
-       d[2] = (ptrint) code;
+       /* code for the stub */
 
        M_ALD_INTERN(REG_ITMP1, REG_PV, -2 * SIZEOF_VOID_P);  /* codeinfo pointer */
        M_ALD_INTERN(REG_PV, REG_PV, -3 * SIZEOF_VOID_P);  /* pointer to compiler */
        M_JMP(REG_PV);
        M_NOP;
-
-       md_cacheflush(s, (s4) (cd->mcodeptr - (u1 *) d));
-
-#if defined(ENABLE_STATISTICS)
-       if (opt_stat)
-               count_cstub_len += COMPILERSTUB_SIZE;
-#endif
-
-       /* release dump area */
-
-       dump_release(dumpsize);
-
-       return s;
 }
 
 
-/* createnativestub ************************************************************
+/* codegen_emit_stub_native ****************************************************
 
-   Creates a stub routine which calls a native method.
+   Emits a stub routine which calls a native method.
 
 *******************************************************************************/
 
-u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
+void codegen_emit_stub_native(jitdata *jd, methoddesc *nmd, functionptr f)
 {
-       methodinfo   *m;
-       codeinfo     *code;
-       codegendata  *cd;
-       registerdata *rd;
-       methoddesc   *md;
-       s4            nativeparams;
-       s4            i, j;                 /* count variables                    */
-       s4            t;
-       s4            s1, s2, disp;
-       s4            funcdisp;             /* displacement of the function       */
+       methodinfo  *m;
+       codeinfo    *code;
+       codegendata *cd;
+       methoddesc  *md;
+       s4           nativeparams;
+       s4           i, j;
+       s4           t;
+       s4           s1, s2, disp;
+       s4           funcdisp;              /* displacement of the function       */
 
        /* get required compiler data */
 
        m    = jd->m;
        code = jd->code;
        cd   = jd->cd;
-       rd   = jd->rd;
 
        /* initialize variables */
 
@@ -3938,7 +3704,7 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 
 #if !defined(WITH_STATIC_CLASSPATH)
        if (f == NULL)
-               codegen_add_patch_ref(cd, PATCHER_resolve_native, m, funcdisp);
+               patcher_add_patch_ref(jd, PATCHER_resolve_native_function, m, funcdisp);
 #endif
 
        /* save integer and float argument registers */
@@ -3946,7 +3712,8 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 #if SIZEOF_VOID_P == 8
        for (i = 0, j = 0; i < md->paramcount && i < INT_ARG_CNT; i++) {
                if (IS_INT_LNG_TYPE(md->params[i].type)) {
-                       M_AST(rd->argintregs[i], REG_SP, j * 8);
+                       s1 = md->params[i].regoff;
+                       M_AST(s1, REG_SP, j * 8);
                        j++;
                }
        }
@@ -3955,14 +3722,12 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
                if (IS_INT_LNG_TYPE(md->params[i].type)) {
                        if (!md->params[i].inmemory) {
                                s1 = md->params[i].regoff;
-                               if (IS_2_WORD_TYPE(md->params[i].type)) {
-                                       s1 = PACK_REGS(rd->argintregs[GET_LOW_REG(s1)],
-                                                                  rd->argintregs[GET_HIGH_REG(s1)]);
+
+                               if (IS_2_WORD_TYPE(md->params[i].type))
                                        M_LST(s1, REG_SP, j * 8);
-                               }
-                               else {
-                                       M_IST(rd->argintregs[s1], REG_SP, j * 8);
-                               }
+                               else
+                                       M_IST(s1, REG_SP, j * 8);
+
                                j++;
                        }
                }
@@ -3971,10 +3736,13 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 
        for (i = 0; i < md->paramcount && i < FLT_ARG_CNT; i++) {
                if (IS_FLT_DBL_TYPE(md->params[i].type)) {
+                       s1 = md->params[i].regoff;
+
                        if (IS_2_WORD_TYPE(md->params[i].type))
-                               M_DST(rd->argfltregs[i], REG_SP, j * 8);
+                               M_DST(s1, REG_SP, j * 8);
                        else
-                               M_FST(rd->argfltregs[i], REG_SP, j * 8);
+                               M_FST(s1, REG_SP, j * 8);
+
                        j++;
                }
        }
@@ -3995,7 +3763,8 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 #if SIZEOF_VOID_P == 8
        for (i = 0, j = 0; i < md->paramcount && i < INT_ARG_CNT; i++) {
                if (IS_INT_LNG_TYPE(md->params[i].type)) {
-                       M_LLD(rd->argintregs[i], REG_SP, j * 8);
+                       s1 = md->params[i].regoff;
+                       M_LLD(s1, REG_SP, j * 8);
                        j++;
                }
        }
@@ -4004,14 +3773,12 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
                if (IS_INT_LNG_TYPE(md->params[i].type)) {
                        if (!md->params[i].inmemory) {
                                s1 = md->params[i].regoff;
-                               if (IS_2_WORD_TYPE(md->params[i].type)) {
-                                       s1 = PACK_REGS(rd->argintregs[GET_LOW_REG(s1)],
-                                                                  rd->argintregs[GET_HIGH_REG(s1)]);
+
+                               if (IS_2_WORD_TYPE(md->params[i].type))
                                        M_LLD(s1, REG_SP, j * 8);
-                               }
-                               else {
-                                       M_ILD(rd->argintregs[s1], REG_SP, j * 8);
-                               }
+                               else
+                                       M_ILD(s1, REG_SP, j * 8);
+
                                j++;
                        }
                }
@@ -4020,10 +3787,13 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 
        for (i = 0; i < md->paramcount && i < FLT_ARG_CNT; i++) {
                if (IS_FLT_DBL_TYPE(md->params[i].type)) {
+                       s1 = md->params[i].regoff;
+
                        if (IS_2_WORD_TYPE(md->params[i].type))
-                               M_DLD(rd->argfltregs[i], REG_SP, j * 8);
+                               M_DLD(s1, REG_SP, j * 8);
                        else
-                               M_FLD(rd->argfltregs[i], REG_SP, j * 8);
+                               M_FLD(s1, REG_SP, j * 8);
+
                        j++;
                }
        }
@@ -4036,61 +3806,44 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
                if (IS_INT_LNG_TYPE(t)) {
                        if (!md->params[i].inmemory) {
                                s1 = md->params[i].regoff;
-#if SIZEOF_VOID_P == 8
-                               s1 = rd->argintregs[s1];
-#else
-                               if (IS_2_WORD_TYPE(t))
-                                       s1 = PACK_REGS(rd->argintregs[GET_LOW_REG(s1)],
-                                                                  rd->argintregs[GET_HIGH_REG(s1)]);
-                               else
-                                       s1 = rd->argintregs[s1];
-#endif
+                               s2 = nmd->params[j].regoff;
 
                                if (!nmd->params[j].inmemory) {
-                                       s2 = nmd->params[j].regoff;
 #if SIZEOF_VOID_P == 8
-                                       s2 = rd->argintregs[s2];
                                        M_INTMOVE(s1, s2);
 #else
-                                       if (IS_2_WORD_TYPE(t)) {
-                                               s2 = PACK_REGS(rd->argintregs[GET_LOW_REG(s2)],
-                                                                          rd->argintregs[GET_HIGH_REG(s2)]);
+                                       if (IS_2_WORD_TYPE(t))
                                                M_LNGMOVE(s1, s2);
-                                       }
-                                       else {
-                                               s2 = rd->argintregs[s2];
+                                       else
                                                M_INTMOVE(s1, s2);
-                                       }
 #endif
                                }
                                else {
-                                       s2 = nmd->params[j].regoff;
-
 #if SIZEOF_VOID_P == 8
-                                       M_LST(s1, REG_SP, s2 * 8);
+                                       M_LST(s1, REG_SP, s2);
 #else
                                        if (IS_2_WORD_TYPE(t))
-                                               M_LST(s1, REG_SP, s2 * 4);
+                                               M_LST(s1, REG_SP, s2);
                                        else
-                                               M_IST(s1, REG_SP, s2 * 4);
+                                               M_IST(s1, REG_SP, s2);
 #endif
                                }
                        }
                        else {
-                               s1 = md->params[i].regoff + cd->stackframesize;
+                               s1 = md->params[i].regoff + cd->stackframesize * 8;
                                s2 = nmd->params[j].regoff;
 
 #if SIZEOF_VOID_P == 8
-                               M_LLD(REG_ITMP1, REG_SP, s1 * 8);
-                               M_LST(REG_ITMP1, REG_SP, s2 * 8);
+                               M_LLD(REG_ITMP1, REG_SP, s1);
+                               M_LST(REG_ITMP1, REG_SP, s2);
 #else
                                if (IS_2_WORD_TYPE(t)) {
-                                       M_LLD(PACK_REGS(REG_ITMP1, REG_ITMP2), REG_SP, s1 * 8);
-                                       M_LST(PACK_REGS(REG_ITMP1, REG_ITMP2), REG_SP, s2 * 4);
+                                       M_LLD(REG_ITMP12_PACKED, REG_SP, s1);
+                                       M_LST(REG_ITMP12_PACKED, REG_SP, s2);
                                }
                                else {
-                                       M_ILD(REG_ITMP1, REG_SP, s1 * 8);
-                                       M_IST(REG_ITMP1, REG_SP, s2 * 4);
+                                       M_ILD(REG_ITMP1, REG_SP, s1);
+                                       M_IST(REG_ITMP1, REG_SP, s2);
                                }
 #endif
                        }
@@ -4102,8 +3855,6 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 
                                if (!nmd->params[j].inmemory) {
 #if SIZEOF_VOID_P == 8
-                                       s1 = rd->argfltregs[s1];
-                                       s2 = rd->argfltregs[s2];
                                        if (IS_2_WORD_TYPE(t))
                                                M_DMOV(s1, s2);
                                        else
@@ -4112,13 +3863,9 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
                                        /* On MIPS32 float arguments for native functions
                                           can never be in float argument registers, since
                                           the first argument is _always_ an integer
-                                          argument (JNIenv) */
+                                          argument (JNIEnv) */
 
                                        if (IS_2_WORD_TYPE(t)) {
-                                               s1 = rd->argfltregs[s1];
-                                               s2 = PACK_REGS(rd->argintregs[GET_LOW_REG(s2)],
-                                                                          rd->argintregs[GET_HIGH_REG(s2)]);
-
                                                /* double high/low order is endian
                                                   independent: even numbered holds low
                                                   32-bits, odd numbered high 32-bits */
@@ -4126,47 +3873,51 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
                                                M_MFC1(GET_LOW_REG(s2), s1);           /* low 32-bits */
                                                M_MFC1(GET_HIGH_REG(s2), s1 + 1);     /* high 32-bits */
                                        }
-                                       else {
-                                               s1 = rd->argfltregs[s1];
-                                               s2 = rd->argintregs[s2];
+                                       else
                                                M_MFC1(s2, s1);
-                                       }
 #endif
                                }
                                else {
 #if SIZEOF_VOID_P == 8
-                                       s1 = rd->argfltregs[s1];
-
                                        if (IS_2_WORD_TYPE(t))
-                                               M_DST(s1, REG_SP, s2 * 8);
+                                               M_DST(s1, REG_SP, s2);
                                        else
-                                               M_FST(s1, REG_SP, s2 * 8);
+                                               M_FST(s1, REG_SP, s2);
 #else
                                        /* s1 may have been originally in 2 int registers,
                                           but was moved out by the native function
                                           argument(s), just get low register */
 
-                                       s1 = rd->argfltregs[GET_LOW_REG(s1)];
-
                                        if (IS_2_WORD_TYPE(t))
-                                               M_DST(s1, REG_SP, s2 * 4);
+                                               M_DST(GET_LOW_REG(s1), REG_SP, s2);
                                        else
-                                               M_FST(s1, REG_SP, s2 * 4);
+                                               M_FST(GET_LOW_REG(s1), REG_SP, s2);
 #endif
                                }
                        }
                        else {
-                               s1 = md->params[i].regoff + cd->stackframesize;
+                               s1 = md->params[i].regoff + cd->stackframesize * 8;
                                s2 = nmd->params[j].regoff;
 
+#if SIZEOF_VOID_P == 8
+                               if (IS_2_WORD_TYPE(t)) {
+                                       M_DLD(REG_FTMP1, REG_SP, s1);
+                                       M_DST(REG_FTMP1, REG_SP, s2);
+                               }
+                               else {
+                                       M_FLD(REG_FTMP1, REG_SP, s1);
+                                       M_FST(REG_FTMP1, REG_SP, s2);
+                               }
+#else
                                if (IS_2_WORD_TYPE(t)) {
-                                       M_DLD(REG_FTMP1, REG_SP, s1 * 8);
-                                       M_DST(REG_FTMP1, REG_SP, s2 * 8);
+                                       M_DLD(REG_FTMP1, REG_SP, s1);
+                                       M_DST(REG_FTMP1, REG_SP, s2);
                                }
                                else {
-                                       M_FLD(REG_FTMP1, REG_SP, s1 * 8);
-                                       M_FST(REG_FTMP1, REG_SP, s2 * 8);
+                                       M_FLD(REG_FTMP1, REG_SP, s1);
+                                       M_FST(REG_FTMP1, REG_SP, s2);
                                }
+#endif
                        }
                }
        }
@@ -4191,21 +3942,32 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 
        /* save return value */
 
-       if (md->returntype.type != TYPE_VOID) {
+       switch (md->returntype.type) {
 #if SIZEOF_VOID_P == 8
-               if (IS_INT_LNG_TYPE(md->returntype.type))
-                       M_LST(REG_RESULT, REG_SP, 0 * 8);
-               else
-                       M_DST(REG_FRESULT, REG_SP, 0 * 8);
+       case TYPE_INT:
+       case TYPE_LNG:
+       case TYPE_ADR:
+               M_LST(REG_RESULT, REG_SP, 0 * 8);
+               break;
+       case TYPE_FLT:
+       case TYPE_DBL:
+               M_DST(REG_FRESULT, REG_SP, 0 * 8);
+               break;
 #else
-               if (IS_INT_LNG_TYPE(md->returntype.type)) {
-                       M_IST(REG_RESULT, REG_SP, 1*4 + 0 * 8);
-                       if (IS_2_WORD_TYPE(md->returntype.type))
-                               M_IST(REG_RESULT2, REG_SP, 1*4 + 0 * 8 + 4);
-               }
-               else
-                       M_DST(REG_FRESULT, REG_SP, 1*4 + 0 * 8);
-#endif
+       case TYPE_INT:
+       case TYPE_ADR:
+               M_IST(REG_RESULT, REG_SP, 1*4 + 0 * 8);
+               break;
+       case TYPE_LNG:
+               M_LST(REG_RESULT_PACKED, REG_SP, 1*4 + 0 * 8);
+               break;
+       case TYPE_FLT:
+       case TYPE_DBL:
+               M_DST(REG_FRESULT, REG_SP, 1*4 + 0 * 8);
+               break;
+#endif
+       case TYPE_VOID:
+               break;
        }
 
 #if !defined(NDEBUG)
@@ -4224,21 +3986,32 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 
        /* restore return value */
 
-       if (md->returntype.type != TYPE_VOID) {
+       switch (md->returntype.type) {
 #if SIZEOF_VOID_P == 8
-               if (IS_INT_LNG_TYPE(md->returntype.type))
-                       M_LLD(REG_RESULT, REG_SP, 0 * 8);
-               else
-                       M_DLD(REG_FRESULT, REG_SP, 0 * 8);
+       case TYPE_INT:
+       case TYPE_LNG:
+       case TYPE_ADR:
+               M_LLD(REG_RESULT, REG_SP, 0 * 8);
+               break;
+       case TYPE_FLT:
+       case TYPE_DBL:
+               M_DLD(REG_FRESULT, REG_SP, 0 * 8);
+               break;
 #else
-               if (IS_INT_LNG_TYPE(md->returntype.type)) {
-                       M_ILD(REG_RESULT, REG_SP, 1*4 + 0 * 8);
-                       if (IS_2_WORD_TYPE(md->returntype.type))
-                               M_ILD(REG_RESULT2, REG_SP, 1*4 + 0 * 8 + 4);
-               }
-               else
-                       M_DLD(REG_FRESULT, REG_SP, 1*4 + 0 * 8);
-#endif
+       case TYPE_INT:
+       case TYPE_ADR:
+               M_ILD(REG_RESULT, REG_SP, 1*4 + 0 * 8);
+               break;
+       case TYPE_LNG:
+               M_LLD(REG_RESULT_PACKED, REG_SP, 1*4 + 0 * 8);
+               break;
+       case TYPE_FLT:
+       case TYPE_DBL:
+               M_DLD(REG_FRESULT, REG_SP, 1*4 + 0 * 8);
+               break;
+#endif
+       case TYPE_VOID:
+               break;
        }
 
        M_ALD(REG_RA, REG_SP, (cd->stackframesize - 1) * 8); /* load RA           */
@@ -4258,13 +4031,9 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
        M_JMP(REG_ITMP3);                   /* jump to asm exception handler      */
        M_ASUB_IMM(REG_RA, 4, REG_ITMP2_XPC); /* get exception address (DELAY)    */
 
-       /* generate patcher stubs */
-
-       emit_patcher_stubs(jd);
-
-       codegen_finish(jd);
+       /* Generate patcher traps. */
 
-       return code->entrypoint;
+       emit_patcher_traps(jd);
 }