/*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#if ENABLE(ASSEMBLER) && (CPU(X86) || CPU(X86_64))
#include "AssemblerBuffer.h"
+#include "JITCompilationEffort.h"
#include <stdint.h>
#include <wtf/Assertions.h>
#include <wtf/Vector.h>
OP_TEST_EbGb = 0x84,
OP_TEST_EvGv = 0x85,
OP_XCHG_EvGv = 0x87,
+ OP_MOV_EbGb = 0x88,
OP_MOV_EvGv = 0x89,
OP_MOV_GvEv = 0x8B,
OP_LEA = 0x8D,
OP_MOV_EAXIv = 0xB8,
OP_GROUP2_EvIb = 0xC1,
OP_RET = 0xC3,
+ OP_GROUP11_EvIb = 0xC6,
OP_GROUP11_EvIz = 0xC7,
OP_INT3 = 0xCC,
OP_GROUP2_Ev1 = 0xD1,
OP_GROUP2_EvCL = 0xD3,
+ OP_ESCAPE_DD = 0xDD,
OP_CALL_rel32 = 0xE8,
OP_JMP_rel32 = 0xE9,
PRE_SSE_F2 = 0xF2,
+ PRE_SSE_F3 = 0xF3,
OP_HLT = 0xF4,
OP_GROUP3_EbIb = 0xF6,
OP_GROUP3_Ev = 0xF7,
typedef enum {
OP2_MOVSD_VsdWsd = 0x10,
OP2_MOVSD_WsdVsd = 0x11,
+ OP2_MOVSS_VsdWsd = 0x10,
+ OP2_MOVSS_WsdVsd = 0x11,
OP2_CVTSI2SD_VsdEd = 0x2A,
OP2_CVTTSD2SI_GdWsd = 0x2C,
OP2_UCOMISD_VsdWsd = 0x2E,
OP2_ADDSD_VsdWsd = 0x58,
OP2_MULSD_VsdWsd = 0x59,
+ OP2_CVTSD2SS_VsdWsd = 0x5A,
+ OP2_CVTSS2SD_VsdWsd = 0x5A,
OP2_SUBSD_VsdWsd = 0x5C,
OP2_DIVSD_VsdWsd = 0x5E,
OP2_SQRTSD_VsdWsd = 0x51,
+ OP2_ANDNPD_VpdWpd = 0x55,
OP2_XORPD_VpdWpd = 0x57,
OP2_MOVD_VdEd = 0x6E,
OP2_MOVD_EdVd = 0x7E,
OP_SETCC = 0x90,
OP2_IMUL_GvEv = 0xAF,
OP2_MOVZX_GvEb = 0xB6,
+ OP2_MOVSX_GvEb = 0xBE,
OP2_MOVZX_GvEw = 0xB7,
+ OP2_MOVSX_GvEw = 0xBF,
OP2_PEXTRW_GdUdIb = 0xC5,
+ OP2_PSLLQ_UdqIb = 0x73,
+ OP2_PSRLQ_UdqIb = 0x73,
+ OP2_POR_VdqWdq = 0XEB,
} TwoByteOpcodeID;
TwoByteOpcodeID jccRel32(Condition cond)
GROUP1_OP_CMP = 7,
GROUP1A_OP_POP = 0,
-
+
+ GROUP2_OP_ROL = 0,
+ GROUP2_OP_ROR = 1,
+ GROUP2_OP_RCL = 2,
+ GROUP2_OP_RCR = 3,
+
GROUP2_OP_SHL = 4,
GROUP2_OP_SHR = 5,
GROUP2_OP_SAR = 7,
GROUP5_OP_PUSH = 6,
GROUP11_MOV = 0,
+
+ GROUP14_OP_PSLLQ = 6,
+ GROUP14_OP_PSRLQ = 2,
+
+ ESCAPE_DD_FSTP_doubleReal = 3,
} GroupOpcodeID;
class X86InstructionFormatter;
public:
X86Assembler()
+ : m_indexOfLastWatchpoint(INT_MIN)
+ , m_indexOfTailOfLastWatchpoint(INT_MIN)
{
}
{
m_formatter.oneByteOp(OP_ADD_GvEv, dst, base, offset);
}
+
+#if !CPU(X86_64)
+ void addl_mr(const void* addr, RegisterID dst)
+ {
+ m_formatter.oneByteOp(OP_ADD_GvEv, dst, addr);
+ }
+#endif
void addl_rm(RegisterID src, int offset, RegisterID base)
{
m_formatter.oneByteOp64(OP_ADD_EvGv, src, dst);
}
+ void addq_mr(int offset, RegisterID base, RegisterID dst)
+ {
+ m_formatter.oneByteOp64(OP_ADD_GvEv, dst, base, offset);
+ }
+
void addq_ir(int imm, RegisterID dst)
{
if (CAN_SIGN_EXTEND_8_32(imm)) {
m_formatter.oneByteOp(OP_GROUP3_Ev, GROUP3_OP_NEG, dst);
}
+#if CPU(X86_64)
+ void negq_r(RegisterID dst)
+ {
+ m_formatter.oneByteOp64(OP_GROUP3_Ev, GROUP3_OP_NEG, dst);
+ }
+#endif
+
void negl_m(int offset, RegisterID base)
{
m_formatter.oneByteOp(OP_GROUP3_Ev, GROUP3_OP_NEG, base, offset);
m_formatter.immediate32(imm);
}
}
+
+ void orl_rm(RegisterID src, const void* addr)
+ {
+ m_formatter.oneByteOp(OP_OR_EvGv, src, addr);
+ }
#endif
void subl_rr(RegisterID src, RegisterID dst)
m_formatter.immediate32(imm);
}
}
+
+ void xorq_rm(RegisterID src, int offset, RegisterID base)
+ {
+ m_formatter.oneByteOp64(OP_XOR_EvGv, src, base, offset);
+ }
+
+ void rorq_i8r(int imm, RegisterID dst)
+ {
+ if (imm == 1)
+ m_formatter.oneByteOp64(OP_GROUP2_Ev1, GROUP2_OP_ROR, dst);
+ else {
+ m_formatter.oneByteOp64(OP_GROUP2_EvIb, GROUP2_OP_ROR, dst);
+ m_formatter.immediate8(imm);
+ }
+ }
+
#endif
void sarl_i8r(int imm, RegisterID dst)
m_formatter.oneByteOp(OP_GROUP1_EbIb, GROUP1_OP_CMP, base, index, scale, offset);
m_formatter.immediate8(imm);
}
+
+#if CPU(X86)
+ void cmpb_im(int imm, const void* addr)
+ {
+ m_formatter.oneByteOp(OP_GROUP1_EbIb, GROUP1_OP_CMP, addr);
+ m_formatter.immediate8(imm);
+ }
+#endif
void cmpl_im(int imm, int offset, RegisterID base, RegisterID index, int scale)
{
}
#endif
+ void cmpw_ir(int imm, RegisterID dst)
+ {
+ if (CAN_SIGN_EXTEND_8_32(imm)) {
+ m_formatter.prefix(PRE_OPERAND_SIZE);
+ m_formatter.oneByteOp(OP_GROUP1_EvIb, GROUP1_OP_CMP, dst);
+ m_formatter.immediate8(imm);
+ } else {
+ m_formatter.prefix(PRE_OPERAND_SIZE);
+ m_formatter.oneByteOp(OP_GROUP1_EvIz, GROUP1_OP_CMP, dst);
+ m_formatter.immediate16(imm);
+ }
+ }
+
void cmpw_rm(RegisterID src, int offset, RegisterID base, RegisterID index, int scale)
{
m_formatter.prefix(PRE_OPERAND_SIZE);
void testb_rr(RegisterID src, RegisterID dst)
{
- m_formatter.oneByteOp(OP_TEST_EbGb, src, dst);
+ m_formatter.oneByteOp8(OP_TEST_EbGb, src, dst);
}
void testb_im(int imm, int offset, RegisterID base)
m_formatter.immediate8(imm);
}
+#if CPU(X86)
+ void testb_im(int imm, const void* addr)
+ {
+ m_formatter.oneByteOp(OP_GROUP3_EbIb, GROUP3_OP_TEST, addr);
+ m_formatter.immediate8(imm);
+ }
+#endif
+
void testl_i32m(int imm, int offset, RegisterID base, RegisterID index, int scale)
{
m_formatter.oneByteOp(OP_GROUP3_EvIz, GROUP3_OP_TEST, base, index, scale, offset);
m_formatter.oneByteOp64(OP_TEST_EvGv, src, dst);
}
+ void testq_rm(RegisterID src, int offset, RegisterID base)
+ {
+ m_formatter.oneByteOp64(OP_TEST_EvGv, src, base, offset);
+ }
+
void testq_i32r(int imm, RegisterID dst)
{
m_formatter.oneByteOp64(OP_GROUP3_EvIz, GROUP3_OP_TEST, dst);
m_formatter.oneByteOp(OP_CDQ);
}
+ void fstpl(int offset, RegisterID base)
+ {
+ m_formatter.oneByteOp(OP_ESCAPE_DD, ESCAPE_DD_FSTP_doubleReal, base, offset);
+ }
+
void xchgl_rr(RegisterID src, RegisterID dst)
{
m_formatter.oneByteOp(OP_XCHG_EvGv, src, dst);
m_formatter.oneByteOp(OP_GROUP11_EvIz, GROUP11_MOV, base, offset);
m_formatter.immediate32(imm);
}
+
+ void movl_i32m(int imm, int offset, RegisterID base, RegisterID index, int scale)
+ {
+ m_formatter.oneByteOp(OP_GROUP11_EvIz, GROUP11_MOV, base, index, scale, offset);
+ m_formatter.immediate32(imm);
+ }
+
+#if !CPU(X86_64)
+ void movb_i8m(int imm, const void* addr)
+ {
+ ASSERT(-128 <= imm && imm < 128);
+ m_formatter.oneByteOp(OP_GROUP11_EvIb, GROUP11_MOV, addr);
+ m_formatter.immediate8(imm);
+ }
+#endif
+
+ void movb_i8m(int imm, int offset, RegisterID base)
+ {
+ ASSERT(-128 <= imm && imm < 128);
+ m_formatter.oneByteOp(OP_GROUP11_EvIb, GROUP11_MOV, base, offset);
+ m_formatter.immediate8(imm);
+ }
+
+ void movb_i8m(int imm, int offset, RegisterID base, RegisterID index, int scale)
+ {
+ ASSERT(-128 <= imm && imm < 128);
+ m_formatter.oneByteOp(OP_GROUP11_EvIb, GROUP11_MOV, base, index, scale, offset);
+ m_formatter.immediate8(imm);
+ }
+
+ void movb_rm(RegisterID src, int offset, RegisterID base, RegisterID index, int scale)
+ {
+ m_formatter.oneByteOp8(OP_MOV_EbGb, src, base, index, scale, offset);
+ }
+
+ void movw_rm(RegisterID src, int offset, RegisterID base, RegisterID index, int scale)
+ {
+ m_formatter.prefix(PRE_OPERAND_SIZE);
+ m_formatter.oneByteOp8(OP_MOV_EvGv, src, base, index, scale, offset);
+ }
void movl_EAXm(const void* addr)
{
m_formatter.twoByteOp(OP2_MOVZX_GvEw, dst, base, index, scale, offset);
}
+ void movswl_mr(int offset, RegisterID base, RegisterID dst)
+ {
+ m_formatter.twoByteOp(OP2_MOVSX_GvEw, dst, base, offset);
+ }
+
+ void movswl_mr(int offset, RegisterID base, RegisterID index, int scale, RegisterID dst)
+ {
+ m_formatter.twoByteOp(OP2_MOVSX_GvEw, dst, base, index, scale, offset);
+ }
+
+ void movzbl_mr(int offset, RegisterID base, RegisterID dst)
+ {
+ m_formatter.twoByteOp(OP2_MOVZX_GvEb, dst, base, offset);
+ }
+
+ void movzbl_mr(int offset, RegisterID base, RegisterID index, int scale, RegisterID dst)
+ {
+ m_formatter.twoByteOp(OP2_MOVZX_GvEb, dst, base, index, scale, offset);
+ }
+
+ void movsbl_mr(int offset, RegisterID base, RegisterID dst)
+ {
+ m_formatter.twoByteOp(OP2_MOVSX_GvEb, dst, base, offset);
+ }
+
+ void movsbl_mr(int offset, RegisterID base, RegisterID index, int scale, RegisterID dst)
+ {
+ m_formatter.twoByteOp(OP2_MOVSX_GvEb, dst, base, index, scale, offset);
+ }
+
void movzbl_rr(RegisterID src, RegisterID dst)
{
// In 64-bit, this may cause an unnecessary REX to be planted (if the dst register
{
m_formatter.oneByteOp(OP_GROUP5_Ev, GROUP5_OP_JMPN, base, offset);
}
+
+#if !CPU(X86_64)
+ void jmp_m(const void* address)
+ {
+ m_formatter.oneByteOp(OP_GROUP5_Ev, GROUP5_OP_JMPN, address);
+ }
+#endif
AssemblerLabel jne()
{
return m_formatter.immediateRel32();
}
+ AssemblerLabel jnp()
+ {
+ m_formatter.twoByteOp(jccRel32(ConditionNP));
+ return m_formatter.immediateRel32();
+ }
+
AssemblerLabel jp()
{
m_formatter.twoByteOp(jccRel32(ConditionP));
m_formatter.twoByteOp(OP2_ADDSD_VsdWsd, (RegisterID)dst, base, offset);
}
+#if !CPU(X86_64)
+ void addsd_mr(const void* address, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_F2);
+ m_formatter.twoByteOp(OP2_ADDSD_VsdWsd, (RegisterID)dst, address);
+ }
+#endif
+
void cvtsi2sd_rr(RegisterID src, XMMRegisterID dst)
{
m_formatter.prefix(PRE_SSE_F2);
m_formatter.twoByteOp(OP2_CVTTSD2SI_GdWsd, dst, (RegisterID)src);
}
+ void cvtsd2ss_rr(XMMRegisterID src, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_F2);
+ m_formatter.twoByteOp(OP2_CVTSD2SS_VsdWsd, dst, (RegisterID)src);
+ }
+
+ void cvtss2sd_rr(XMMRegisterID src, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_F3);
+ m_formatter.twoByteOp(OP2_CVTSS2SD_VsdWsd, dst, (RegisterID)src);
+ }
+
+#if CPU(X86_64)
+ void cvttsd2siq_rr(XMMRegisterID src, RegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_F2);
+ m_formatter.twoByteOp64(OP2_CVTTSD2SI_GdWsd, dst, (RegisterID)src);
+ }
+#endif
+
void movd_rr(XMMRegisterID src, RegisterID dst)
{
m_formatter.prefix(PRE_SSE_66);
m_formatter.twoByteOp(OP2_MOVD_EdVd, (RegisterID)src, dst);
}
+ void movd_rr(RegisterID src, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_66);
+ m_formatter.twoByteOp(OP2_MOVD_VdEd, (RegisterID)dst, src);
+ }
+
#if CPU(X86_64)
void movq_rr(XMMRegisterID src, RegisterID dst)
{
m_formatter.prefix(PRE_SSE_F2);
m_formatter.twoByteOp(OP2_MOVSD_WsdVsd, (RegisterID)src, base, offset);
}
-
+
+ void movsd_rm(XMMRegisterID src, int offset, RegisterID base, RegisterID index, int scale)
+ {
+ m_formatter.prefix(PRE_SSE_F2);
+ m_formatter.twoByteOp(OP2_MOVSD_WsdVsd, (RegisterID)src, base, index, scale, offset);
+ }
+
+ void movss_rm(XMMRegisterID src, int offset, RegisterID base, RegisterID index, int scale)
+ {
+ m_formatter.prefix(PRE_SSE_F3);
+ m_formatter.twoByteOp(OP2_MOVSD_WsdVsd, (RegisterID)src, base, index, scale, offset);
+ }
+
void movsd_mr(int offset, RegisterID base, XMMRegisterID dst)
{
m_formatter.prefix(PRE_SSE_F2);
m_formatter.twoByteOp(OP2_MOVSD_VsdWsd, (RegisterID)dst, base, offset);
}
+ void movsd_mr(int offset, RegisterID base, RegisterID index, int scale, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_F2);
+ m_formatter.twoByteOp(OP2_MOVSD_VsdWsd, dst, base, index, scale, offset);
+ }
+
+ void movss_mr(int offset, RegisterID base, RegisterID index, int scale, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_F3);
+ m_formatter.twoByteOp(OP2_MOVSD_VsdWsd, dst, base, index, scale, offset);
+ }
+
#if !CPU(X86_64)
void movsd_mr(const void* address, XMMRegisterID dst)
{
m_formatter.prefix(PRE_SSE_F2);
m_formatter.twoByteOp(OP2_MOVSD_VsdWsd, (RegisterID)dst, address);
}
+ void movsd_rm(XMMRegisterID src, const void* address)
+ {
+ m_formatter.prefix(PRE_SSE_F2);
+ m_formatter.twoByteOp(OP2_MOVSD_WsdVsd, (RegisterID)src, address);
+ }
#endif
void mulsd_rr(XMMRegisterID src, XMMRegisterID dst)
m_formatter.immediate8(whichWord);
}
+ void psllq_i8r(int imm, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_66);
+ m_formatter.twoByteOp8(OP2_PSLLQ_UdqIb, GROUP14_OP_PSLLQ, (RegisterID)dst);
+ m_formatter.immediate8(imm);
+ }
+
+ void psrlq_i8r(int imm, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_66);
+ m_formatter.twoByteOp8(OP2_PSRLQ_UdqIb, GROUP14_OP_PSRLQ, (RegisterID)dst);
+ m_formatter.immediate8(imm);
+ }
+
+ void por_rr(XMMRegisterID src, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_66);
+ m_formatter.twoByteOp(OP2_POR_VdqWdq, (RegisterID)dst, (RegisterID)src);
+ }
+
void subsd_rr(XMMRegisterID src, XMMRegisterID dst)
{
m_formatter.prefix(PRE_SSE_F2);
m_formatter.twoByteOp(OP2_XORPD_VpdWpd, (RegisterID)dst, (RegisterID)src);
}
+ void andnpd_rr(XMMRegisterID src, XMMRegisterID dst)
+ {
+ m_formatter.prefix(PRE_SSE_66);
+ m_formatter.twoByteOp(OP2_ANDNPD_VpdWpd, (RegisterID)dst, (RegisterID)src);
+ }
+
void sqrtsd_rr(XMMRegisterID src, XMMRegisterID dst)
{
m_formatter.prefix(PRE_SSE_F2);
{
return m_formatter.codeSize();
}
+
+ AssemblerLabel labelForWatchpoint()
+ {
+ AssemblerLabel result = m_formatter.label();
+ if (static_cast<int>(result.m_offset) != m_indexOfLastWatchpoint)
+ result = label();
+ m_indexOfLastWatchpoint = result.m_offset;
+ m_indexOfTailOfLastWatchpoint = result.m_offset + maxJumpReplacementSize();
+ return result;
+ }
+
+ AssemblerLabel labelIgnoringWatchpoints()
+ {
+ return m_formatter.label();
+ }
AssemblerLabel label()
{
- return m_formatter.label();
+ AssemblerLabel result = m_formatter.label();
+ while (UNLIKELY(static_cast<int>(result.m_offset) < m_indexOfTailOfLastWatchpoint)) {
+ nop();
+ result = m_formatter.label();
+ }
+ return result;
}
AssemblerLabel align(int alignment)
static void repatchCompact(void* where, int32_t value)
{
- ASSERT(value >= 0);
+ ASSERT(value >= std::numeric_limits<int8_t>::min());
ASSERT(value <= std::numeric_limits<int8_t>::max());
setInt8(where, value);
}
return reinterpret_cast<void**>(where)[-1];
}
+ static void replaceWithJump(void* instructionStart, void* to)
+ {
+ uint8_t* ptr = reinterpret_cast<uint8_t*>(instructionStart);
+ uint8_t* dstPtr = reinterpret_cast<uint8_t*>(to);
+ intptr_t distance = (intptr_t)(dstPtr - (ptr + 5));
+ ptr[0] = static_cast<uint8_t>(OP_JMP_rel32);
+ *reinterpret_cast<int32_t*>(ptr + 1) = static_cast<int32_t>(distance);
+ }
+
+ static ptrdiff_t maxJumpReplacementSize()
+ {
+ return 5;
+ }
+
+#if CPU(X86_64)
+ static void revertJumpTo_movq_i64r(void* instructionStart, int64_t imm, RegisterID dst)
+ {
+ const int rexBytes = 1;
+ const int opcodeBytes = 1;
+ ASSERT(rexBytes + opcodeBytes <= maxJumpReplacementSize());
+ uint8_t* ptr = reinterpret_cast<uint8_t*>(instructionStart);
+ ptr[0] = PRE_REX | (1 << 3) | (dst >> 3);
+ ptr[1] = OP_MOV_EAXIv | (dst & 7);
+
+ union {
+ uint64_t asWord;
+ uint8_t asBytes[8];
+ } u;
+ u.asWord = imm;
+ for (unsigned i = rexBytes + opcodeBytes; i < static_cast<unsigned>(maxJumpReplacementSize()); ++i)
+ ptr[i] = u.asBytes[i - rexBytes - opcodeBytes];
+ }
+#endif
+
+ static void revertJumpTo_cmpl_ir_force32(void* instructionStart, int32_t imm, RegisterID dst)
+ {
+ const int opcodeBytes = 1;
+ const int modRMBytes = 1;
+ ASSERT(opcodeBytes + modRMBytes <= maxJumpReplacementSize());
+ uint8_t* ptr = reinterpret_cast<uint8_t*>(instructionStart);
+ ptr[0] = OP_GROUP1_EvIz;
+ ptr[1] = (X86InstructionFormatter::ModRmRegister << 6) | (GROUP1_OP_CMP << 3) | dst;
+ union {
+ uint32_t asWord;
+ uint8_t asBytes[4];
+ } u;
+ u.asWord = imm;
+ for (unsigned i = opcodeBytes + modRMBytes; i < static_cast<unsigned>(maxJumpReplacementSize()); ++i)
+ ptr[i] = u.asBytes[i - opcodeBytes - modRMBytes];
+ }
+
+ static void revertJumpTo_cmpl_im_force32(void* instructionStart, int32_t imm, int offset, RegisterID dst)
+ {
+ ASSERT_UNUSED(offset, !offset);
+ const int opcodeBytes = 1;
+ const int modRMBytes = 1;
+ ASSERT(opcodeBytes + modRMBytes <= maxJumpReplacementSize());
+ uint8_t* ptr = reinterpret_cast<uint8_t*>(instructionStart);
+ ptr[0] = OP_GROUP1_EvIz;
+ ptr[1] = (X86InstructionFormatter::ModRmMemoryNoDisp << 6) | (GROUP1_OP_CMP << 3) | dst;
+ union {
+ uint32_t asWord;
+ uint8_t asBytes[4];
+ } u;
+ u.asWord = imm;
+ for (unsigned i = opcodeBytes + modRMBytes; i < static_cast<unsigned>(maxJumpReplacementSize()); ++i)
+ ptr[i] = u.asBytes[i - opcodeBytes - modRMBytes];
+ }
+
+ static void replaceWithLoad(void* instructionStart)
+ {
+ uint8_t* ptr = reinterpret_cast<uint8_t*>(instructionStart);
+#if CPU(X86_64)
+ if ((*ptr & ~15) == PRE_REX)
+ ptr++;
+#endif
+ switch (*ptr) {
+ case OP_MOV_GvEv:
+ break;
+ case OP_LEA:
+ *ptr = OP_MOV_GvEv;
+ break;
+ default:
+ RELEASE_ASSERT_NOT_REACHED();
+ }
+ }
+
+ static void replaceWithAddressComputation(void* instructionStart)
+ {
+ uint8_t* ptr = reinterpret_cast<uint8_t*>(instructionStart);
+#if CPU(X86_64)
+ if ((*ptr & ~15) == PRE_REX)
+ ptr++;
+#endif
+ switch (*ptr) {
+ case OP_MOV_GvEv:
+ *ptr = OP_LEA;
+ break;
+ case OP_LEA:
+ break;
+ default:
+ RELEASE_ASSERT_NOT_REACHED();
+ }
+ }
+
static unsigned getCallReturnOffset(AssemblerLabel call)
{
ASSERT(call.isSet());
return b.m_offset - a.m_offset;
}
- void* executableCopy(JSGlobalData& globalData, ExecutablePool* allocator)
+ PassRefPtr<ExecutableMemoryHandle> executableCopy(VM& vm, void* ownerUID, JITCompilationEffort effort)
{
- return m_formatter.executableCopy(globalData, allocator);
+ return m_formatter.executableCopy(vm, ownerUID, effort);
}
- void rewindToLabel(AssemblerLabel rewindTo) { m_formatter.rewindToLabel(rewindTo); }
-
-#ifndef NDEBUG
unsigned debugOffset() { return m_formatter.debugOffset(); }
-#endif
void nop()
{
m_formatter.oneByteOp(OP_NOP);
}
+ // This is a no-op on x86
+ ALWAYS_INLINE static void cacheFlush(void*, size_t) { }
+
private:
static void setPointer(void* where, void* value)
public:
+ enum ModRmMode {
+ ModRmMemoryNoDisp,
+ ModRmMemoryDisp8,
+ ModRmMemoryDisp32,
+ ModRmRegister,
+ };
+
// Legacy prefix bytes:
//
// These are emmitted prior to the instruction.
registerModRM(groupOp, rm);
}
+ void oneByteOp8(OneByteOpcodeID opcode, int reg, RegisterID rm)
+ {
+ m_buffer.ensureSpace(maxInstructionSize);
+ emitRexIf(byteRegRequiresRex(reg) || byteRegRequiresRex(rm), reg, 0, rm);
+ m_buffer.putByteUnchecked(opcode);
+ registerModRM(reg, rm);
+ }
+
+ void oneByteOp8(OneByteOpcodeID opcode, int reg, RegisterID base, RegisterID index, int scale, int offset)
+ {
+ m_buffer.ensureSpace(maxInstructionSize);
+ emitRexIf(byteRegRequiresRex(reg) || regRequiresRex(index) || regRequiresRex(base), reg, index, base);
+ m_buffer.putByteUnchecked(opcode);
+ memoryModRM(reg, base, index, scale, offset);
+ }
+
void twoByteOp8(TwoByteOpcodeID opcode, RegisterID reg, RegisterID rm)
{
m_buffer.ensureSpace(maxInstructionSize);
bool isAligned(int alignment) const { return m_buffer.isAligned(alignment); }
void* data() const { return m_buffer.data(); }
- void* executableCopy(JSGlobalData& globalData, ExecutablePool* allocator)
+ PassRefPtr<ExecutableMemoryHandle> executableCopy(VM& vm, void* ownerUID, JITCompilationEffort effort)
{
- return m_buffer.executableCopy(globalData, allocator);
+ return m_buffer.executableCopy(vm, ownerUID, effort);
}
- void rewindToLabel(AssemblerLabel rewindTo) { m_buffer.rewindToLabel(rewindTo); }
-
-#ifndef NDEBUG
unsigned debugOffset() { return m_buffer.debugOffset(); }
-#endif
private:
// Format a REX prefix byte.
inline void emitRex(bool w, int r, int x, int b)
{
+ ASSERT(r >= 0);
+ ASSERT(x >= 0);
+ ASSERT(b >= 0);
m_buffer.putByteUnchecked(PRE_REX | ((int)w << 3) | ((r>>3)<<2) | ((x>>3)<<1) | (b>>3));
}
inline void emitRexIfNeeded(int, int, int) {}
#endif
- enum ModRmMode {
- ModRmMemoryNoDisp,
- ModRmMemoryDisp8,
- ModRmMemoryDisp32,
- ModRmRegister,
- };
-
void putModRm(ModRmMode mode, int reg, RegisterID rm)
{
m_buffer.putByteUnchecked((mode << 6) | ((reg & 7) << 3) | (rm & 7));
AssemblerBuffer m_buffer;
} m_formatter;
+ int m_indexOfLastWatchpoint;
+ int m_indexOfTailOfLastWatchpoint;
};
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff