* src/vm/vm.c, src/vm/vm.h: Moved to .cpp.
[cacao.git] / src / vm / jit / mips / codegen.c
index 15dd71e2678a34897ff32ebe47dbea188e8ff0d7..68ad764c25c95a1976a362173a738ccea746a9f4 100644 (file)
@@ -1,9 +1,7 @@
 /* src/vm/jit/mips/codegen.c - machine code generator for MIPS
 
-   Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
-   C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
-   E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
-   J. Wenninger, Institut f. Computersprachen - TU Wien
+   Copyright (C) 1996-2005, 2006, 2007, 2008
+   CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
 
    This file is part of CACAO.
 
@@ -22,8 +20,6 @@
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    02110-1301, USA.
 
-   $Id: codegen.c 7570 2007-03-24 22:20:09Z twisti $
-
 */
 
 
 
 #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/exceptions.h"
-#include "vm/vm.h"
+#include "vm/vm.hpp"
 
+#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/md.h"
-#include "vm/jit/patcher.h"
+#include "vm/jit/linenumbertable.h"
+#include "vm/jit/patcher-common.h"
 #include "vm/jit/reg.h"
 #include "vm/jit/replace.h"
+#include "vm/jit/trap.h"
 
 #if defined(ENABLE_LSRA)
 # include "vm/jit/allocator/lsra.h"
@@ -85,7 +82,6 @@ bool codegen_emit(jitdata *jd)
        varinfo            *var;
        basicblock         *bptr;
        instruction        *iptr;
-       exception_entry    *ex;
        u2                  currentline;
        constant_classref  *cr;
        unresolved_class   *uc;
@@ -120,7 +116,7 @@ bool codegen_emit(jitdata *jd)
        s4 i, p, t, l;
        s4 savedregs_num;
 
-       savedregs_num = (jd->isleafmethod) ? 0 : 1;       /* space to save the RA */
+       savedregs_num = code_is_leafmethod(code) ? 0 : 1; /* space to save the RA */
 
        /* space to save used callee saved registers */
 
@@ -132,7 +128,7 @@ bool codegen_emit(jitdata *jd)
 #if defined(ENABLE_THREADS)
        /* space to save argument of monitor_enter */
 
-       if (checksync && (m->flags & ACC_SYNCHRONIZED)) {
+       if (checksync && code_is_synchronized(code)) {
 # if SIZEOF_VOID_P == 8
                cd->stackframesize++;
 # else
@@ -152,34 +148,18 @@ bool codegen_emit(jitdata *jd)
        (void) dseg_add_unique_address(cd, code);              /* CodeinfoPointer */
        (void) dseg_add_unique_s4(cd, cd->stackframesize * 8); /* FrameSize       */
 
-#if defined(ENABLE_THREADS)
-       /* IsSync contains the offset relative to the stack pointer for the
-          argument of monitor_exit used in the exception handler. Since the
-          offset could be zero and give a wrong meaning of the flag it is
-          offset by one.
-       */
-
-       if (checksync && (m->flags & ACC_SYNCHRONIZED))
-               (void) dseg_add_unique_s4(cd, (rd->memuse + 1) * 8); /* IsSync        */
+       code->synchronizedoffset = rd->memuse * 8;
+
+       /* REMOVEME: We still need it for exception handling in assembler. */
+
+       if (code_is_leafmethod(code))
+               (void) dseg_add_unique_s4(cd, 1);
        else
-#endif
-               (void) dseg_add_unique_s4(cd, 0);                  /* IsSync          */
-                                              
-       (void) dseg_add_unique_s4(cd, jd->isleafmethod);       /* IsLeaf          */
+               (void) dseg_add_unique_s4(cd, 0);
+
        (void) dseg_add_unique_s4(cd, INT_SAV_CNT - rd->savintreguse); /* IntSave */
        (void) dseg_add_unique_s4(cd, FLT_SAV_CNT - rd->savfltreguse); /* FltSave */
-       dseg_addlinenumbertablesize(cd);
-       (void) dseg_add_unique_s4(cd, jd->exceptiontablelength); /* ExTableSize   */
 
-       /* create exception table */
-
-       for (ex = jd->exceptiontable; ex != NULL; ex = ex->down) {
-               dseg_add_target(cd, ex->start);
-               dseg_add_target(cd, ex->end);
-               dseg_add_target(cd, ex->handler);
-               (void) dseg_add_unique_address(cd, ex->catchtype.any);
-       }
-       
        /* create stack frame (if necessary) */
 
        if (cd->stackframesize)
@@ -188,7 +168,7 @@ bool codegen_emit(jitdata *jd)
        /* save return address and used callee saved registers */
 
        p = cd->stackframesize;
-       if (!jd->isleafmethod) {
+       if (!code_is_leafmethod(code)) {
                p--; M_AST(REG_RA, REG_SP, p * 8);
        }
        for (i = INT_SAV_CNT - 1; i >= rd->savintreguse; i--) {
@@ -215,121 +195,77 @@ bool codegen_emit(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 */
 
 #if defined(ENABLE_THREADS)
-       if (checksync && (m->flags & ACC_SYNCHRONIZED)) {
+       if (checksync && code_is_synchronized(code)) {
                /* stack offset for monitor argument */
 
                s1 = rd->memuse;
@@ -339,10 +275,10 @@ bool codegen_emit(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;
                }
@@ -351,7 +287,7 @@ bool codegen_emit(jitdata *jd)
                /* get correct lock object */
 
                if (m->flags & ACC_STATIC) {
-                       disp = dseg_add_address(cd, &m->class->object.header);
+                       disp = dseg_add_address(cd, &m->clazz->object.header);
                        M_ALD(REG_A0, REG_PV, disp);
                        disp = dseg_add_functionptr(cd, LOCK_monitor_enter);
                        M_ALD(REG_ITMP3, REG_PV, disp);
@@ -361,7 +297,7 @@ bool codegen_emit(jitdata *jd)
                        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);
+                       M_ALD_INTERN(REG_ZERO, REG_ZERO, TRAP_NullPointerException);
                }
 
                M_JSR(REG_RA, REG_ITMP3);
@@ -370,10 +306,10 @@ bool codegen_emit(jitdata *jd)
 # 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);
@@ -454,7 +390,7 @@ bool codegen_emit(jitdata *jd)
 
                for (iptr = bptr->iinstr; len > 0; len--, iptr++) {
                        if (iptr->line != currentline) {
-                               dseg_addlinenumber(cd, iptr->line);
+                               linenumbertable_list_entry_add(cd, iptr->line);
                                currentline = iptr->line;
                        }
 
@@ -475,14 +411,14 @@ bool codegen_emit(jitdata *jd)
                case ICMD_INLINE_BODY:
 
                        REPLACEMENT_POINT_INLINE_BODY(cd, iptr);
-                       dseg_addlinenumber_inline_start(cd, iptr);
-                       dseg_addlinenumber(cd, iptr->line);
+                       linenumbertable_list_entry_add_inline_start(cd, iptr);
+                       linenumbertable_list_entry_add(cd, iptr->line);
                        break;
 
                case ICMD_INLINE_END:
 
-                       dseg_addlinenumber_inline_end(cd, iptr);
-                       dseg_addlinenumber(cd, iptr->line);
+                       linenumbertable_list_entry_add_inline_end(cd, iptr);
+                       linenumbertable_list_entry_add(cd, iptr->line);
                        break;
 
                case ICMD_CHECKNULL:  /* ..., objectref  ==> ..., objectref           */
@@ -535,7 +471,8 @@ bool codegen_emit(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);
                        }
@@ -554,23 +491,23 @@ bool codegen_emit(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;
 
 
@@ -980,22 +917,17 @@ bool codegen_emit(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);
@@ -1756,7 +1688,7 @@ bool codegen_emit(jitdata *jd)
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
                        /* implicit null-pointer check */
-                       M_ILD(d, s1, OFFSET(java_arrayheader, size));
+                       M_ILD(d, s1, OFFSET(java_array_t, size));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1768,7 +1700,7 @@ bool codegen_emit(jitdata *jd)
                        emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_AADD(s2, s1, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_BLDS(d, REG_ITMP3, OFFSET(java_bytearray, data[0]));
+                       M_BLDS(d, REG_ITMP3, OFFSET(java_bytearray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1781,7 +1713,7 @@ bool codegen_emit(jitdata *jd)
                        M_AADD(s2, s1, REG_ITMP3);
                        M_AADD(s2, REG_ITMP3, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_SLDU(d, REG_ITMP3, OFFSET(java_chararray, data[0]));
+                       M_SLDU(d, REG_ITMP3, OFFSET(java_chararray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;                  
 
@@ -1794,7 +1726,7 @@ bool codegen_emit(jitdata *jd)
                        M_AADD(s2, s1, REG_ITMP3);
                        M_AADD(s2, REG_ITMP3, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_SLDS(d, REG_ITMP3, OFFSET(java_shortarray, data[0]));
+                       M_SLDS(d, REG_ITMP3, OFFSET(java_shortarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1807,7 +1739,7 @@ bool codegen_emit(jitdata *jd)
                        M_ASLL_IMM(s2, 2, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_ILD_INTERN(d, REG_ITMP3, OFFSET(java_intarray, data[0]));
+                       M_ILD_INTERN(d, REG_ITMP3, OFFSET(java_intarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1824,7 +1756,7 @@ bool codegen_emit(jitdata *jd)
                        M_ASLL_IMM(s2, 3, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_LLD_INTERN(d, REG_ITMP3, OFFSET(java_longarray, data[0]));
+                       M_LLD_INTERN(d, REG_ITMP3, OFFSET(java_longarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1837,7 +1769,7 @@ bool codegen_emit(jitdata *jd)
                        M_ASLL_IMM(s2, 2, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_FLD_INTERN(d, REG_ITMP3, OFFSET(java_floatarray, data[0]));
+                       M_FLD_INTERN(d, REG_ITMP3, OFFSET(java_floatarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1850,7 +1782,7 @@ bool codegen_emit(jitdata *jd)
                        M_ASLL_IMM(s2, 3, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_DLD_INTERN(d, REG_ITMP3, OFFSET(java_doublearray, data[0]));
+                       M_DLD_INTERN(d, REG_ITMP3, OFFSET(java_doublearray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1863,7 +1795,7 @@ bool codegen_emit(jitdata *jd)
                        M_ASLL_IMM(s2, POINTERSHIFT, REG_ITMP3);
                        M_AADD(REG_ITMP3, s1, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_ALD_INTERN(d, REG_ITMP3, OFFSET(java_objectarray, data[0]));
+                       M_ALD_INTERN(d, REG_ITMP3, OFFSET(java_objectarray_t, data[0]));
                        emit_store_dst(jd, iptr, d);
                        break;
 
@@ -1876,7 +1808,7 @@ bool codegen_emit(jitdata *jd)
                        M_AADD(s2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_BST(s3, REG_ITMP1, OFFSET(java_bytearray, data[0]));
+                       M_BST(s3, REG_ITMP1, OFFSET(java_bytearray_t, data[0]));
                        break;
 
                case ICMD_CASTORE:    /* ..., arrayref, index, value  ==> ...         */
@@ -1889,7 +1821,7 @@ bool codegen_emit(jitdata *jd)
                        M_AADD(s2, REG_ITMP1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_SST(s3, REG_ITMP1, OFFSET(java_chararray, data[0]));
+                       M_SST(s3, REG_ITMP1, OFFSET(java_chararray_t, data[0]));
                        break;
 
                case ICMD_IASTORE:    /* ..., arrayref, index, value  ==> ...         */
@@ -1901,7 +1833,7 @@ bool codegen_emit(jitdata *jd)
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_IST_INTERN(s3, REG_ITMP1, OFFSET(java_intarray, data[0]));
+                       M_IST_INTERN(s3, REG_ITMP1, OFFSET(java_intarray_t, data[0]));
                        break;
 
                case ICMD_LASTORE:    /* ..., arrayref, index, value  ==> ...         */
@@ -1917,7 +1849,7 @@ bool codegen_emit(jitdata *jd)
                        s3 = emit_load_s3(jd, iptr, REG_ITMP23_PACKED);
 #endif
                        /* implicit null-pointer check */
-                       M_LST_INTERN(s3, REG_ITMP1, OFFSET(java_longarray, data[0]));
+                       M_LST_INTERN(s3, REG_ITMP1, OFFSET(java_longarray_t, data[0]));
                        break;
 
                case ICMD_FASTORE:    /* ..., arrayref, index, value  ==> ...         */
@@ -1929,7 +1861,7 @@ bool codegen_emit(jitdata *jd)
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_FTMP1);
                        /* implicit null-pointer check */
-                       M_FST_INTERN(s3, REG_ITMP1, OFFSET(java_floatarray, data[0]));
+                       M_FST_INTERN(s3, REG_ITMP1, OFFSET(java_floatarray_t, data[0]));
                        break;
 
                case ICMD_DASTORE:    /* ..., arrayref, index, value  ==> ...         */
@@ -1941,7 +1873,7 @@ bool codegen_emit(jitdata *jd)
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_FTMP1);
                        /* implicit null-pointer check */
-                       M_DST_INTERN(s3, REG_ITMP1, OFFSET(java_doublearray, data[0]));
+                       M_DST_INTERN(s3, REG_ITMP1, OFFSET(java_doublearray_t, data[0]));
                        break;
 
 
@@ -1954,11 +1886,11 @@ bool codegen_emit(jitdata *jd)
 
                        M_INTMOVE(s1, REG_A0);
                        M_INTMOVE(s3, REG_A1);
-                       disp = dseg_add_functionptr(cd, BUILTIN_canstore);
+                       disp = dseg_add_functionptr(cd, BUILTIN_FAST_canstore);
                        M_ALD(REG_ITMP3, REG_PV, disp);
                        M_JSR(REG_RA, REG_ITMP3);
                        M_NOP;
-                       emit_exception_check(cd, iptr);
+                       emit_arraystore_check(cd, iptr);
 
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        s2 = emit_load_s2(jd, iptr, REG_ITMP2);
@@ -1966,7 +1898,7 @@ bool codegen_emit(jitdata *jd)
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        s3 = emit_load_s3(jd, iptr, REG_ITMP3);
                        /* implicit null-pointer check */
-                       M_AST_INTERN(s3, REG_ITMP1, OFFSET(java_objectarray, data[0]));
+                       M_AST_INTERN(s3, REG_ITMP1, OFFSET(java_objectarray_t, data[0]));
                        break;
 
 
@@ -1977,7 +1909,7 @@ bool codegen_emit(jitdata *jd)
                        emit_arrayindexoutofbounds_check(cd, iptr, s1, s2);
                        M_AADD(s2, s1, REG_ITMP1);
                        /* implicit null-pointer check */
-                       M_BST(REG_ZERO, REG_ITMP1, OFFSET(java_bytearray, data[0]));
+                       M_BST(REG_ZERO, REG_ITMP1, OFFSET(java_bytearray_t, data[0]));
                        break;
 
                case ICMD_CASTORECONST:   /* ..., arrayref, index  ==> ...            */
@@ -1989,7 +1921,7 @@ bool codegen_emit(jitdata *jd)
                        M_AADD(s2, s1, REG_ITMP1);
                        M_AADD(s2, REG_ITMP1, REG_ITMP1);
                        /* implicit null-pointer check */
-                       M_SST(REG_ZERO, REG_ITMP1, OFFSET(java_chararray, data[0]));
+                       M_SST(REG_ZERO, REG_ITMP1, OFFSET(java_chararray_t, data[0]));
                        break;
 
                case ICMD_IASTORECONST:   /* ..., arrayref, index  ==> ...            */
@@ -2000,7 +1932,7 @@ bool codegen_emit(jitdata *jd)
                        M_ASLL_IMM(s2, 2, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        /* implicit null-pointer check */
-                       M_IST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_intarray, data[0]));
+                       M_IST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_intarray_t, data[0]));
                        break;
 
                case ICMD_LASTORECONST:   /* ..., arrayref, index  ==> ...            */
@@ -2012,9 +1944,9 @@ bool codegen_emit(jitdata *jd)
                        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;
 
@@ -2026,7 +1958,7 @@ bool codegen_emit(jitdata *jd)
                        M_ASLL_IMM(s2, POINTERSHIFT, REG_ITMP2);
                        M_AADD(REG_ITMP2, s1, REG_ITMP1);
                        /* implicit null-pointer check */
-                       M_AST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_objectarray, data[0]));
+                       M_AST_INTERN(REG_ZERO, REG_ITMP1, OFFSET(java_objectarray_t, data[0]));
                        break;
 
 
@@ -2037,15 +1969,16 @@ bool codegen_emit(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);
+                               if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->clazz))
+                                       patcher_add_patch_ref(jd, PATCHER_initialize_class,
+                                                                                 fi->clazz, disp);
                        }
 
                        M_ALD(REG_ITMP1, REG_PV, disp);
@@ -2086,15 +2019,16 @@ bool codegen_emit(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);
+                               if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->clazz))
+                                       patcher_add_patch_ref(jd, PATCHER_initialize_class,
+                                                                                 fi->clazz, disp);
                        }
 
                        M_ALD(REG_ITMP1, REG_PV, disp);
@@ -2128,23 +2062,22 @@ bool codegen_emit(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);
+                               if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->clazz))
+                                       patcher_add_patch_ref(jd, PATCHER_initialize_class,
+                                                                                 fi->clazz, disp);
                        }
 
                        M_ALD(REG_ITMP1, REG_PV, disp);
@@ -2179,7 +2112,7 @@ bool codegen_emit(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;
@@ -2250,7 +2183,7 @@ bool codegen_emit(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:
@@ -2277,15 +2210,14 @@ bool codegen_emit(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;
                        }
@@ -2321,7 +2253,7 @@ bool codegen_emit(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 */
 
@@ -2449,10 +2381,10 @@ bool codegen_emit(jitdata *jd)
 #if SIZEOF_VOID_P == 8
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        if (iptr->sx.val.l == 0)
-                               M_BEQZ(s1, 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) {
@@ -2477,16 +2409,16 @@ bool codegen_emit(jitdata *jd)
 
 #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) {
@@ -2513,16 +2445,17 @@ bool codegen_emit(jitdata *jd)
 
 #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
@@ -2552,11 +2485,11 @@ bool codegen_emit(jitdata *jd)
 
 #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) {
@@ -2581,16 +2514,17 @@ bool codegen_emit(jitdata *jd)
 
 #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
@@ -2620,16 +2554,17 @@ bool codegen_emit(jitdata *jd)
 
 #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) {
@@ -2837,7 +2772,7 @@ bool codegen_emit(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;
@@ -2879,7 +2814,7 @@ nowperformreturn:
 #endif
 
 #if defined(ENABLE_THREADS)
-                       if (checksync && (m->flags & ACC_SYNCHRONIZED)) {
+                       if (checksync && code_is_synchronized(code)) {
                                disp = dseg_add_functionptr(cd, LOCK_monitor_exit);
                                M_ALD(REG_ITMP3, REG_PV, disp);
 
@@ -2940,7 +2875,7 @@ nowperformreturn:
 
                        /* restore return address                                         */
 
-                       if (!jd->isleafmethod) {
+                       if (!code_is_leafmethod(code)) {
                                p--; M_ALD(REG_RA, REG_SP, p * 8);
                        }
 
@@ -3090,6 +3025,7 @@ 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;
@@ -3097,107 +3033,79 @@ 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);
                                        }
                                }
                        }
 
                        switch (iptr->opc) {
                        case ICMD_BUILTIN:
-                               disp = dseg_add_functionptr(cd, bte->fp);
+                               if (bte->stub == NULL) {
+                                       disp = dseg_add_functionptr(cd, bte->fp);
+                                       M_ALD(REG_ITMP3, REG_PV, disp);  /* built-in-function pointer */
 
-                               M_ALD(REG_ITMP3, REG_PV, disp);  /* built-in-function pointer */
+                                       /* generate the actual call */
 
-                               /* generate the actual call */
+                                       /* TWISTI: i actually don't know the reason for using
+                                          REG_ITMP3 here instead of REG_PV. */
+
+                                       M_JSR(REG_RA, REG_ITMP3);
+                                       M_NOP;
+                               }
+                               else {
+                                       disp = dseg_add_functionptr(cd, bte->stub);
+                                       M_ALD(REG_PV, REG_PV, disp);          /* method pointer in pv */
 
-                               /* TWISTI: i actually don't know the reason for using
-                                  REG_ITMP3 here instead of REG_PV. */
+                                       /* generate the actual call */
+
+                                       M_JSR(REG_RA, REG_PV);
+                                       M_NOP;
+                               }
 
-                               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);
-
-                               emit_exception_check(cd, iptr);
                                break;
 
                        case ICMD_INVOKESPECIAL:
@@ -3208,7 +3116,7 @@ gen_method:
                                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
@@ -3229,7 +3137,7 @@ gen_method:
                                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;
                                }
@@ -3238,7 +3146,7 @@ gen_method:
                                                sizeof(methodptr) * lm->vftblindex;
 
                                /* implicit null-pointer check */
-                               M_ALD(REG_METHODPTR, REG_A0, OFFSET(java_objectheader, vftbl));
+                               M_ALD(REG_METHODPTR, REG_A0, OFFSET(java_object_t, vftbl));
                                M_ALD(REG_PV, REG_METHODPTR, s1);
 
                                /* generate the actual call */
@@ -3254,20 +3162,20 @@ gen_method:
                                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;
                                }
                                else {
                                        s1 = OFFSET(vftbl_t, interfacetable[0]) -
-                                               sizeof(methodptr*) * lm->class->index;
+                                               sizeof(methodptr*) * lm->clazz->index;
 
-                                       s2 = sizeof(methodptr) * (lm - lm->class->methods);
+                                       s2 = sizeof(methodptr) * (lm - lm->clazz->methods);
                                }
 
                                /* implicit null-pointer check */
-                               M_ALD(REG_METHODPTR, REG_A0, OFFSET(java_objectheader, vftbl));
+                               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);
 
@@ -3314,20 +3222,6 @@ 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;
@@ -3338,14 +3232,10 @@ 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
-
                                s1 = emit_load_s1(jd, iptr, REG_ITMP1);
 
                                /* if class is not resolved, check which code to call */
@@ -3356,7 +3246,7 @@ gen_method:
                                        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);
 
                                        M_ILD(REG_ITMP2, REG_PV, disp);
@@ -3370,14 +3260,14 @@ 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 {
                                                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);
@@ -3403,8 +3293,8 @@ gen_method:
                                                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 {
@@ -3413,11 +3303,9 @@ gen_method:
                                                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
+
                                        M_ILD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, baseval));
                                        /*                              if (s1 != REG_ITMP1) { */
                                        /*                                      M_ILD(REG_ITMP1, REG_ITMP3, OFFSET(vftbl_t, baseval)); */
@@ -3431,9 +3319,7 @@ 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
+
                                        /*                              } */
                                        M_CMPULT(REG_ITMP3, REG_ITMP2, REG_ITMP3);
                                        emit_classcast_check(cd, iptr, ICMD_IFNE, REG_ITMP3, s1);
@@ -3457,11 +3343,13 @@ 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);
@@ -3480,20 +3368,6 @@ 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;
@@ -3510,10 +3384,6 @@ gen_method:
                                superindex = super->index;
                        }
                        
-#if defined(ENABLE_THREADS)
-                       codegen_threadcritrestart(cd, cd->mcodeptr - cd->mcodebase);
-#endif
-
                        s1 = emit_load_s1(jd, iptr, REG_ITMP1);
                        d = codegen_reg_of_dst(jd, iptr, REG_ITMP2);
 
@@ -3532,7 +3402,7 @@ gen_method:
                                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);
 
                                M_ILD(REG_ITMP3, REG_PV, disp);
@@ -3546,14 +3416,14 @@ 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 {
                                        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);
@@ -3579,7 +3449,7 @@ gen_method:
                                        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 {
@@ -3588,17 +3458,13 @@ gen_method:
                                        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
+
                                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
+
                                M_ISUB(REG_ITMP1, REG_ITMP3, REG_ITMP1); 
                                M_CMPULT(REG_ITMP2, REG_ITMP1, d);
                                M_XOR_IMM(d, 1, d);
@@ -3648,11 +3514,12 @@ 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 */
 
@@ -3703,12 +3570,9 @@ gen_method:
        } /* if (bptr -> flags >= BBREACHED) */
        } /* for basic block */
 
-       dseg_createlinenumbertable(cd);
+       /* generate traps */
 
-       /* generate stubs */
-
-       emit_patcher_stubs(jd);
-       REPLACEMENT_EMIT_STUBS(jd);
+       emit_patcher_traps(jd);
 
        /* everything's ok */
 
@@ -3716,102 +3580,38 @@ gen_method:
 }
 
 
-/* createcompilerstub **********************************************************
-
-   Creates 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)
-{
-       u1          *s;                     /* memory to hold the stub            */
-       ptrint      *d;
-       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;
-
-       /* The codeinfo pointer is actually a pointer to the
-          methodinfo. This fakes a codeinfo structure. */
-
-       d[0] = (ptrint) asm_call_jit_compiler;
-       d[1] = (ptrint) m;
-       d[2] = (ptrint) &d[1];                                    /* fake code->m */
-
-       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, int skipparams)
 {
-       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           i, j;
+       s4           t;
+       int          s1, s2;
+       int          disp;
 
        /* get required compiler data */
 
        m    = jd->m;
        code = jd->code;
        cd   = jd->cd;
-       rd   = jd->rd;
 
        /* initialize variables */
 
        md = m->parseddesc;
-       nativeparams = (m->flags & ACC_STATIC) ? 2 : 1;
 
        /* calculate stack frame size */
 
        cd->stackframesize =
                1 +                             /* return address                     */
-               sizeof(stackframeinfo) / SIZEOF_VOID_P +
+               sizeof(stackframeinfo_t) / SIZEOF_VOID_P +
                sizeof(localref_table) / SIZEOF_VOID_P +
                md->paramcount +                /* for saving arguments over calls    */
 #if SIZEOF_VOID_P == 4
@@ -3829,12 +3629,9 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 
        (void) dseg_add_unique_address(cd, code);              /* CodeinfoPointer */
        (void) dseg_add_unique_s4(cd, cd->stackframesize * 8); /* FrameSize       */
-       (void) dseg_add_unique_s4(cd, 0);                      /* IsSync          */
        (void) dseg_add_unique_s4(cd, 0);                      /* IsLeaf          */
        (void) dseg_add_unique_s4(cd, 0);                      /* IntSave         */
        (void) dseg_add_unique_s4(cd, 0);                      /* FltSave         */
-       (void) dseg_addlinenumbertablesize(cd);
-       (void) dseg_add_unique_s4(cd, 0);                      /* ExTableSize     */
 
        /* generate stub code */
 
@@ -3846,21 +3643,13 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
                emit_verbosecall_enter(jd);
 #endif
 
-       /* get function address (this must happen before the stackframeinfo) */
-
-       funcdisp = dseg_add_functionptr(cd, f);
-
-#if !defined(WITH_STATIC_CLASSPATH)
-       if (f == NULL)
-               codegen_add_patch_ref(cd, PATCHER_resolve_native, m, funcdisp);
-#endif
-
        /* save integer and float argument registers */
 
 #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++;
                }
        }
@@ -3869,14 +3658,12 @@ 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++;
                        }
                }
@@ -3885,31 +3672,38 @@ 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++;
                }
        }
 
        /* prepare data structures for native function call */
 
-       M_AADD_IMM(REG_SP, (cd->stackframesize - 1) * 8, REG_A0);
+       M_MOV(REG_SP, REG_A0);
        M_MOV(REG_PV, REG_A1);
-       M_AADD_IMM(REG_SP, cd->stackframesize * 8, REG_A2);
-       M_ALD(REG_A3, REG_SP, (cd->stackframesize - 1) * 8);
        disp = dseg_add_functionptr(cd, codegen_start_native_call);
        M_ALD(REG_ITMP3, REG_PV, disp);
        M_JSR(REG_RA, REG_ITMP3);
        M_NOP; /* XXX fill me! */
 
+       /* remember class argument */
+
+       if (m->flags & ACC_STATIC)
+               M_MOV(REG_RESULT, REG_ITMP3);
+
        /* restore integer and float argument registers */
 
 #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++;
                }
        }
@@ -3918,14 +3712,12 @@ 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++;
                        }
                }
@@ -3934,77 +3726,63 @@ 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++;
                }
        }
 
        /* copy or spill arguments to new locations */
 
-       for (i = md->paramcount - 1, j = i + nativeparams; i >= 0; i--, j--) {
+       for (i = md->paramcount - 1, j = i + skipparams; i >= 0; i--, j--) {
                t = md->params[i].type;
 
                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
                        }
@@ -4016,8 +3794,6 @@ 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
@@ -4026,13 +3802,9 @@ 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 */
@@ -4040,86 +3812,104 @@ 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 * 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);
                                }
+#else
+                               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);
+                               }
+#endif
                        }
                }
        }
 
-       /* put class into second argument register */
+       /* Handle native Java methods. */
 
-       if (m->flags & ACC_STATIC) {
-               disp = dseg_add_address(cd, m->class);
-               M_ALD(REG_A1, REG_PV, disp);
-       }
+       if (m->flags & ACC_NATIVE) {
+               /* put class into second argument register */
+
+               if (m->flags & ACC_STATIC)
+                       M_MOV(REG_ITMP3, REG_A1);
 
-       /* put env into first argument register */
+               /* put env into first argument register */
 
-       disp = dseg_add_address(cd, _Jv_env);
-       M_ALD(REG_A0, REG_PV, disp);
+               disp = dseg_add_address(cd, _Jv_env);
+               M_ALD(REG_A0, REG_PV, disp);
+       }
 
-       /* do the native function call */
+       /* Call the native function. */
 
-       M_ALD(REG_ITMP3, REG_PV, funcdisp); /* load adress of native method       */
+       disp = dseg_add_functionptr(cd, f);
+       M_ALD(REG_ITMP3, REG_PV, disp);     /* load adress of native method       */
        M_JSR(REG_RA, REG_ITMP3);           /* call native method                 */
        M_NOP;                              /* delay slot                         */
 
        /* 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, 2*4 + 0 * 8);
+               break;
+       case TYPE_LNG:
+               M_LST(REG_RESULT_PACKED, REG_SP, 2*4 + 0 * 8);
+               break;
+       case TYPE_FLT:
+       case TYPE_DBL:
+               M_DST(REG_FRESULT, REG_SP, 2*4 + 0 * 8);
+               break;
+#endif
+       case TYPE_VOID:
+               break;
        }
 
 #if !defined(NDEBUG)
@@ -4129,7 +3919,8 @@ u1 *createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 
        /* remove native stackframe info */
 
-       M_AADD_IMM(REG_SP, (cd->stackframesize - 1) * 8, REG_A0);
+       M_MOV(REG_SP, REG_A0);
+       M_MOV(REG_PV, REG_A1);
        disp = dseg_add_functionptr(cd, codegen_finish_native_call);
        M_ALD(REG_ITMP3, REG_PV, disp);
        M_JSR(REG_RA, REG_ITMP3);
@@ -4138,21 +3929,32 @@ 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, 2*4 + 0 * 8);
+               break;
+       case TYPE_LNG:
+               M_LLD(REG_RESULT_PACKED, REG_SP, 2*4 + 0 * 8);
+               break;
+       case TYPE_FLT:
+       case TYPE_DBL:
+               M_DLD(REG_FRESULT, REG_SP, 2*4 + 0 * 8);
+               break;
+#endif
+       case TYPE_VOID:
+               break;
        }
 
        M_ALD(REG_RA, REG_SP, (cd->stackframesize - 1) * 8); /* load RA           */
@@ -4172,13 +3974,9 @@ 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);
 }