+/* src/vm/jit/m68k/emit.c
+
+ Copyright (C) 1996-2005, 2006, 2007, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
+
+ This file is part of CACAO.
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
+
+*/
+
+
+#include "config.h"
+
+#include <assert.h>
+
+#include "vm/jit/m68k/codegen.h"
+#include "vm/jit/m68k/emit.h"
+
+#include "mm/memory.hpp"
+
+#include "vm/jit/builtin.hpp"
+
+#include "vm/jit/asmpart.h"
+#include "vm/jit/emit-common.hpp"
+#include "vm/jit/trace.hpp"
+#include "vm/jit/trap.hpp"
+
+
+/* emit_mov_imm_reg **************************************************************************
+ *
+ * Loads an immededat operand into an integer data register
+ *
+ ********************************************************************************************/
+void emit_mov_imm_reg (codegendata *cd, s4 imm, s4 dreg)
+{
+ /* FIXME: -1 can be used as byte form 0xff, but this ifs cascade is plain wrong it seems */
+
+ if ( (imm & 0x0000007F) == imm) {
+ /* use byte form */
+ *((s2*)cd->mcodeptr) = 0x7000 | (dreg << 9) | imm; /* MOVEQ.L */
+ cd->mcodeptr += 2;
+ } else if ((imm & 0x00007FFF) == imm) {
+ /* use word form */
+ OPWORD( ((7<<6) | (dreg << 3) | 5), 7, 4); /* MVS.W */
+ *((s2*)cd->mcodeptr) = (s2)imm;
+ cd->mcodeptr += 2;
+ } else {
+ /* use long form */
+ OPWORD( ((2<<6) | (dreg << 3) | 0), 7, 4);
+ *((s4*)cd->mcodeptr) = (s4)imm;
+ cd->mcodeptr += 4;
+
+ }
+}
+
+/* emit_copy *******************************************************************
+
+ Generates a register/memory to register/memory copy.
+
+*******************************************************************************/
+
+void emit_copy(jitdata *jd, instruction *iptr)
+{
+ codegendata *cd;
+ varinfo *src;
+ varinfo *dst;
+ s4 s1, d;
+
+ /* get required compiler data */
+
+ cd = jd->cd;
+
+ /* get source and destination variables */
+
+ src = VAROP(iptr->s1);
+ dst = VAROP(iptr->dst);
+
+ if ((src->vv.regoff != dst->vv.regoff) ||
+ (IS_INMEMORY(src->flags ^ dst->flags))) {
+
+ if ((src->type == TYPE_RET) || (dst->type == TYPE_RET)) {
+ /* emit nothing, as the value won't be used anyway */
+ return;
+ }
+
+ /* If one of the variables resides in memory, we can eliminate
+ the register move from/to the temporary register with the
+ order of getting the destination register and the load. */
+
+ if (IS_INMEMORY(src->flags)) {
+ if (IS_LNG_TYPE(src->type))
+ d = codegen_reg_of_var(iptr->opc, dst, REG_ITMP12_PACKED);
+ else
+ d = codegen_reg_of_var(iptr->opc, dst, REG_IFTMP);
+
+ s1 = emit_load(jd, iptr, src, d);
+ }
+ else {
+ if (IS_LNG_TYPE(src->type))
+ s1 = emit_load(jd, iptr, src, REG_ITMP12_PACKED);
+ else
+ s1 = emit_load(jd, iptr, src, REG_IFTMP);
+
+ d = codegen_reg_of_var(iptr->opc, dst, s1);
+ }
+
+ if (s1 != d) {
+ switch(src->type) {
+ case TYPE_INT: M_INTMOVE(s1, d); break;
+ case TYPE_ADR: M_ADRMOVE(s1, d); break;
+ case TYPE_LNG: M_LNGMOVE(s1, d); break;
+#if !defined(ENABLE_SOFTFLOAT)
+ case TYPE_FLT: M_FLTMOVE(s1, d); break;
+ case TYPE_DBL: M_DBLMOVE(s1, d); break;
+#else
+ case TYPE_FLT: M_INTMOVE(s1, d); break;
+ case TYPE_DBL: M_LNGMOVE(s1, d); break;
+#endif
+ default:
+ vm_abort("emit_copy: unknown type %d", src->type);
+ }
+ }
+
+ emit_store(jd, iptr, dst, d);
+ }
+}
+
+
+/* emit_store ******************************************************************
+
+ Emits a possible store of the destination operand.
+
+*******************************************************************************/
+
+void emit_store(jitdata *jd, instruction *iptr, varinfo *dst, s4 d)
+{
+ codegendata *cd;
+
+ /* get required compiler data */
+
+ cd = jd->cd;
+
+ if (IS_INMEMORY(dst->flags)) {
+ COUNT_SPILLS;
+
+ switch(dst->type) {
+#if defined(ENABLE_SOFTFLOAT)
+ case TYPE_DBL:
+#endif
+ case TYPE_LNG:
+ M_LST(d, REG_SP, dst->vv.regoff);
+ break;
+#if defined(ENABLE_SOFTFLOAT)
+ case TYPE_FLT:
+#endif
+ case TYPE_INT:
+ M_IST(d, REG_SP, dst->vv.regoff);
+ break;
+ case TYPE_ADR:
+ M_AST(d, REG_SP, dst->vv.regoff);
+ break;
+#if !defined(ENABLE_SOFTFLOAT)
+ case TYPE_DBL:
+ M_DST(d, REG_SP, dst->vv.regoff);
+ break;
+ case TYPE_FLT:
+ M_FST(d, REG_SP, dst->vv.regoff);
+ break;
+#endif
+ default:
+ vm_abort("emit_store: unknown type %d", dst->type);
+ }
+ }
+}
+
+
+/* emit_load *******************************************************************
+
+ Emits a possible load of an operand.
+
+*******************************************************************************/
+
+s4 emit_load(jitdata *jd, instruction *iptr, varinfo *src, s4 tempreg)
+{
+ codegendata *cd;
+ s4 disp;
+ s4 reg;
+
+ /* get required compiler data */
+
+ cd = jd->cd;
+
+ if (IS_INMEMORY(src->flags)) {
+ COUNT_SPILLS;
+
+ disp = src->vv.regoff;
+
+ switch (src->type) {
+#if defined(ENABLE_SOFTFLOAT)
+ case TYPE_FLT:
+#endif
+ case TYPE_INT:
+ M_ILD(tempreg, REG_SP, disp);
+ break;
+#if defined(ENABLE_SOFTFLOAT)
+ case TYPE_DBL:
+#endif
+ case TYPE_LNG:
+ M_LLD(tempreg, REG_SP, disp);
+ break;
+ case TYPE_ADR:
+ M_ALD(tempreg, REG_SP, disp);
+ break;
+#if !defined(ENABLE_SOFTFLOAT)
+ case TYPE_FLT:
+ M_FLD(tempreg, REG_SP, disp);
+ break;
+ case TYPE_DBL:
+ M_DLD(tempreg, REG_SP, disp);
+ break;
+#endif
+ default:
+ vm_abort("emit_load: unknown type %d", src->type);
+ }
+ #if 0
+ if (IS_FLT_DBL_TYPE(src->type)) {
+ if (IS_2_WORD_TYPE(src->type)) {
+ M_DLD(tempreg, REG_SP, disp);
+ } else {
+ M_FLD(tempreg, REG_SP, disp);
+ }
+ } else {
+ if (IS_2_WORD_TYPE(src->type)) {
+ M_LLD(tempreg, REG_SP, disp);
+ } else {
+ M_ILD(tempreg, REG_SP, disp);
+ }
+ }
+ #endif
+
+ reg = tempreg;
+ }
+ else
+ reg = src->vv.regoff;
+
+ return reg;
+}
+
+s4 emit_load_low(jitdata *jd, instruction *iptr, varinfo *src, s4 tempreg)
+{
+ codegendata *cd;
+ s4 disp;
+ s4 reg;
+
+#if !defined(ENABLE_SOFTFLOAT)
+ assert(src->type == TYPE_LNG);
+#else
+ assert(src->type == TYPE_LNG || src->type == TYPE_DBL);
+#endif
+
+ /* get required compiler data */
+ cd = jd->cd;
+
+ if (IS_INMEMORY(src->flags)) {
+ COUNT_SPILLS;
+
+ disp = src->vv.regoff;
+ M_ILD(tempreg, REG_SP, disp + 4);
+ reg = tempreg;
+ } else {
+ reg = GET_LOW_REG(src->vv.regoff);
+ }
+ return reg;
+}
+s4 emit_load_high(jitdata *jd, instruction *iptr, varinfo *src, s4 tempreg)
+{
+ codegendata *cd;
+ s4 disp;
+ s4 reg;
+
+#if !defined(ENABLE_SOFTFLOAT)
+ assert(src->type == TYPE_LNG);
+#else
+ assert(src->type == TYPE_LNG || src->type == TYPE_DBL);
+#endif
+ /* get required compiler data */
+ cd = jd->cd;
+
+ if (IS_INMEMORY(src->flags)) {
+ COUNT_SPILLS;
+ disp = src->vv.regoff;
+ M_ILD(tempreg, REG_SP, disp);
+ reg = tempreg;
+ } else {
+ reg = GET_HIGH_REG(src->vv.regoff);
+ }
+ return reg;
+}
+/* emit_branch *****************************************************************
+
+ Emits the code for conditional and unconditional branchs.
+
+*******************************************************************************/
+void emit_branch(codegendata *cd, s4 disp, s4 condition, s4 reg, u4 opt)
+{
+ /* calculate the different displacements */
+ /* PC is a at branch instruction + 2 */
+ /* coditional and uncondition branching work the same way */
+ /* short branches have signed 16 bit offset */
+ /* long branches are signed 32 bit */
+ /* the 8 bit offset branching instructions are not used */
+
+ disp = disp - 2;
+
+ /* check displacement for overflow */
+ if ((disp & 0x0000FFFF) != disp) {
+ if (!CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
+ cd->flags |= (CODEGENDATA_FLAG_ERROR | CODEGENDATA_FLAG_LONGBRANCHES);
+ }
+ }
+
+ /* check which branch to generate */
+
+ if (condition == BRANCH_UNCONDITIONAL) {
+ if (CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
+ M_BR_32(disp);
+ } else {
+ M_BR_16(disp);
+ }
+ } else {
+ if (CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
+ switch (condition) {
+ case BRANCH_EQ:
+ M_BEQ_32(disp);
+ break;
+ case BRANCH_NE:
+ M_BNE_32(disp);
+ break;
+ case BRANCH_LT:
+ M_BLT_32(disp);
+ break;
+ case BRANCH_GE:
+ M_BGE_32(disp);
+ break;
+ case BRANCH_GT:
+ M_BGT_32(disp);
+ break;
+ case BRANCH_LE:
+ M_BLE_32(disp);
+ break;
+ case BRANCH_NAN:
+ M_BNAN_32(disp);
+ break;
+ case BRANCH_UGT:
+ M_BHI_32(disp);
+ break;
+
+ default:
+ vm_abort("emit_branch: unknown condition %d", condition);
+ }
+ } else {
+ switch (condition) {
+ case BRANCH_EQ:
+ M_BEQ_16(disp);
+ break;
+ case BRANCH_NE:
+ M_BNE_16(disp);
+ break;
+ case BRANCH_LT:
+ M_BLT_16(disp);
+ break;
+ case BRANCH_GE:
+ M_BGE_16(disp);
+ break;
+ case BRANCH_GT:
+ M_BGT_16(disp);
+ break;
+ case BRANCH_LE:
+ M_BLE_16(disp);
+ break;
+ case BRANCH_NAN:
+ M_BNAN_16(disp);
+ break;
+ case BRANCH_UGT:
+ M_BHI_16(disp);
+ break;
+ default:
+ vm_abort("emit_branch: unknown condition %d", condition);
+ }
+ }
+ }
+}
+
+
+#if !defined(NDEBUG)
+/*
+ * Trace functions. Implement -verbose:call flag
+ * code marked by real NOP, but performance is no matter when using -verbose:call :)
+ */
+void emit_verbosecall_enter(jitdata* jd)
+{
+ methodinfo *m;
+ codegendata *cd;
+ registerdata *rd;
+ methoddesc *md;
+
+ if (!JITDATA_HAS_FLAG_VERBOSECALL(jd))
+ return;
+
+ /* get required compiler data */
+ m = jd->m;
+ cd = jd->cd;
+ rd = jd->rd;
+ md = m->parseddesc;
+
+ /* mark trace code */
+ M_NOP;
+
+ M_IPUSH(REG_D0);
+ M_IPUSH(REG_D1);
+ M_APUSH(REG_A0);
+ M_APUSH(REG_A1);
+ M_AMOV(REG_SP, REG_A0); /* simpyfy stack offset calculation */
+
+#if !defined(ENABLE_SOFTFLOAT)
+ M_AADD_IMM(-8*2, REG_SP);
+ M_FSTORE(REG_F0, REG_SP, 8);
+ M_FSTORE(REG_F1, REG_SP, 0);
+#endif
+
+ M_AADD_IMM(4*4 + 4, REG_A0);
+ M_APUSH(REG_A0); /* third arg is original argument stack */
+ M_IPUSH_IMM(0); /* second arg is number of argument registers (=0) */
+ M_IPUSH_IMM(m); /* first arg is methodpointer */
+
+ M_JSR_IMM(trace_java_call_enter);
+ /* pop arguments off stack */
+ M_AADD_IMM(3*4, REG_SP);
+
+#if !defined(ENABLE_SOFTFLOAT)
+ M_FSTORE(REG_F1, REG_SP, 0);
+ M_FSTORE(REG_F0, REG_SP, 8);
+ M_AADD_IMM(8*2, REG_SP);
+#endif
+
+ M_APOP(REG_A1);
+ M_APOP(REG_A0);
+ M_IPOP(REG_D1);
+ M_IPOP(REG_D0);
+
+ M_NOP;
+}
+void emit_verbosecall_exit(jitdata* jd)
+{
+ methodinfo *m;
+ codegendata *cd;
+ registerdata *rd;
+ methoddesc *md;
+
+ if (!JITDATA_HAS_FLAG_VERBOSECALL(jd))
+ return;
+
+ /* get required compiler data */
+ m = jd->m;
+ cd = jd->cd;
+ rd = jd->rd;
+ md = m->parseddesc;
+
+ /* void builtin_verbosecall_exit(s8 l, double d, float f, methodinfo *m); */
+
+ /* void trace_java_call_exit(methodinfo *m, uint64_t *return_regs) */
+
+ /* mark trace code */
+ M_NOP;
+
+ /* to store result on stack */
+ M_AADD_IMM(-8, REG_SP); /* create space for array */
+
+ switch (md->returntype.type) {
+ case TYPE_ADR:
+ case TYPE_INT:
+ #if defined(ENABLE_SOFTFLOAT)
+ case TYPE_FLT:
+ #endif
+ M_IST(REG_D0, REG_SP, 0);
+ break;
+
+ case TYPE_LNG:
+ #if defined(ENABLE_SOFTFLOAT)
+ case TYPE_DBL:
+ #endif
+ M_LST(REG_D1, REG_SP, 0);
+ break;
+
+ #if !defined(ENABLE_SOFTFLOAT)
+ case TYPE_FLT: /* FIXME */
+ case TYPE_DBL: /* FIXME */
+ #endif
+
+ case TYPE_VOID: /* nothing */
+ break;
+
+ default:
+ assert(0);
+ }
+
+ M_APUSH(REG_SP); /* push address of array */
+ M_IPUSH_IMM(m); /* push methodinfo */
+ M_JSR_IMM(trace_java_call_exit);
+
+ M_AADD_IMM(8, REG_SP); /* remove args */
+ /* poping result registers from stack */
+ switch (md->returntype.type) {
+ case TYPE_ADR:
+ case TYPE_INT:
+ #if defined(ENABLE_SOFTFLOAT)
+ case TYPE_FLT:
+ #endif
+ M_ILD(REG_D0, REG_SP, 0);
+ break;
+
+ case TYPE_LNG:
+ #if defined(ENABLE_SOFTFLOAT)
+ case TYPE_DBL:
+ #endif
+ M_LLD(REG_D1, REG_SP, 0);
+ break;
+
+ #if !defined(ENABLE_SOFTFLOAT)
+ case TYPE_FLT: /* FIXME */
+ case TYPE_DBL: /* FIXME */
+ #endif
+
+ case TYPE_VOID: /* nothing */
+ break;
+
+ default:
+ assert(0);
+ }
+
+ M_AADD_IMM(8, REG_SP); /* remove space for array */
+
+ M_NOP;
+}
+#endif
+
+/* emit_classcast_check ********************************************************
+
+ Emit a ClassCastException check.
+
+*******************************************************************************/
+
+void emit_classcast_check(codegendata *cd, instruction *iptr, s4 condition, s4 reg, s4 s1)
+{
+ if (INSTRUCTION_MUST_CHECK(iptr)) {
+ switch (condition) {
+ case BRANCH_LE:
+ M_BGT(4);
+ break;
+ case BRANCH_EQ:
+ M_BNE(4);
+ break;
+ case BRANCH_GT:
+ M_BLE(4);
+ break;
+ case BRANCH_UGT:
+ M_BLS(4);
+ break;
+ default:
+ vm_abort("emit_classcast_check: unknown condition %d", condition);
+ }
+ M_TRAP_SETREGISTER(s1);
+ M_TRAP(TRAP_ClassCastException);
+ }
+}
+
+/* emit_arrayindexoutofbounds_check ********************************************
+
+ Emit a ArrayIndexOutOfBoundsException check.
+
+*******************************************************************************/
+void emit_arrayindexoutofbounds_check(codegendata *cd, instruction *iptr, s4 s1, s4 s2)
+{
+ if (INSTRUCTION_MUST_CHECK(iptr)) {
+ M_ILD(REG_ITMP3, s1, OFFSET(java_array_t, size));
+ M_ICMP(s2, REG_ITMP3);
+ M_BHI(4);
+ M_TRAP_SETREGISTER(s2);
+ M_TRAP(TRAP_ArrayIndexOutOfBoundsException);
+ }
+}
+
+
+/* emit_arraystore_check *******************************************************
+
+ Emit an ArrayStoreException check.
+
+*******************************************************************************/
+
+void emit_arraystore_check(codegendata *cd, instruction *iptr)
+{
+ if (INSTRUCTION_MUST_CHECK(iptr)) {
+ M_ITST(REG_RESULT);
+ M_BNE(2);
+ M_TRAP(TRAP_ArrayStoreException);
+ }
+}
+
+
+/* emit_nullpointer_check ******************************************************
+
+ Emit a NullPointerException check.
+
+*******************************************************************************/
+
+void emit_nullpointer_check(codegendata *cd, instruction *iptr, s4 reg)
+{
+ if (INSTRUCTION_MUST_CHECK(iptr)) {
+ /* XXX: this check is copied to call monitor_enter
+ * invocation at the beginning of codegen.c */
+ M_ATST(reg);
+ M_BNE(2);
+ M_TRAP(TRAP_NullPointerException);
+ }
+}
+
+/* emit_arithmetic_check *******************************************************
+
+ Emit an ArithmeticException check.
+
+*******************************************************************************/
+
+void emit_arithmetic_check(codegendata *cd, instruction *iptr, s4 reg)
+{
+ if (INSTRUCTION_MUST_CHECK(iptr)) {
+ M_ITST(reg);
+ M_BNE(2);
+ M_TRAP(TRAP_ArithmeticException);
+ }
+}
+
+/* emit_exception_check_ireg **************************************************
+
+ Emit an Exception check. Teste register is integer REG_RESULT
+
+*******************************************************************************/
+void emit_exception_check(codegendata *cd, instruction *iptr)
+{
+ if (INSTRUCTION_MUST_CHECK(iptr)) {
+ M_ITST(REG_RESULT);
+ M_BNE(2);
+ M_TRAP(TRAP_CHECK_EXCEPTION);
+ }
+}
+
+/* emit_trap_compiler **********************************************************
+
+ Emit a trap instruction which calls the JIT compiler.
+
+*******************************************************************************/
+
+void emit_trap_compiler(codegendata *cd)
+{
+ M_TRAP_SETREGISTER(REG_METHODPTR);
+ M_TRAP(TRAP_COMPILER);
+}
+
+
+/* emit_trap *******************************************************************
+
+ Emit a trap instruction and return the original machine code.
+
+*******************************************************************************/
+
+uint32_t emit_trap(codegendata *cd)
+{
+ uint32_t mcode;
+
+ /* Get machine code which is patched back in later. The
+ trap is 2 bytes long. */
+
+ mcode = *((uint32_t *) cd->mcodeptr);
+
+ M_TRAP(TRAP_PATCHER);
+
+ return mcode;
+}
+
+
+
+/*
+ * These are local overrides for various environment variables in Emacs.
+ * Please do not remove this and leave it at the end of the file, where
+ * Emacs will automagically detect them.
+ * ---------------------------------------------------------------------
+ * Local variables:
+ * mode: c
+ * indent-tabs-mode: t
+ * c-basic-offset: 4
+ * tab-width: 4
+ * End:
+ * vim:noexpandtab:sw=4:ts=4:
+ */
projects / cacao.git / blobdiff