diff options
Diffstat (limited to 'src/3rdparty/masm/assembler/MIPSAssembler.h')
| -rw-r--r-- | src/3rdparty/masm/assembler/MIPSAssembler.h | 109 |
1 files changed, 92 insertions, 17 deletions
diff --git a/src/3rdparty/masm/assembler/MIPSAssembler.h b/src/3rdparty/masm/assembler/MIPSAssembler.h index 026f87e5..7f553bb9 100644 --- a/src/3rdparty/masm/assembler/MIPSAssembler.h +++ b/src/3rdparty/masm/assembler/MIPSAssembler.h @@ -152,6 +152,8 @@ public: typedef SegmentedVector<AssemblerLabel, 64> Jumps; MIPSAssembler() + : m_indexOfLastWatchpoint(INT_MIN) + , m_indexOfTailOfLastWatchpoint(INT_MIN) { } @@ -325,7 +327,7 @@ public: emitInst(0x00000000 | (rd << OP_SH_RD) | (rt << OP_SH_RT) | ((shamt & 0x1f) << OP_SH_SHAMT)); } - void sllv(RegisterID rd, RegisterID rt, int rs) + void sllv(RegisterID rd, RegisterID rt, RegisterID rs) { emitInst(0x00000004 | (rd << OP_SH_RD) | (rt << OP_SH_RT) | (rs << OP_SH_RS)); } @@ -527,6 +529,16 @@ public: emitInst(0x46200004 | (fd << OP_SH_FD) | (fs << OP_SH_FS)); } + void movd(FPRegisterID fd, FPRegisterID fs) + { + emitInst(0x46200006 | (fd << OP_SH_FD) | (fs << OP_SH_FS)); + } + + void negd(FPRegisterID fd, FPRegisterID fs) + { + emitInst(0x46200007 | (fd << OP_SH_FD) | (fs << OP_SH_FS)); + } + void truncwd(FPRegisterID fd, FPRegisterID fs) { emitInst(0x4620000d | (fd << OP_SH_FD) | (fs << OP_SH_FS)); @@ -619,9 +631,24 @@ public: return m_buffer.label(); } + AssemblerLabel labelForWatchpoint() + { + AssemblerLabel result = m_buffer.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 label() { - return m_buffer.label(); + AssemblerLabel result = m_buffer.label(); + while (UNLIKELY(static_cast<int>(result.m_offset) < m_indexOfTailOfLastWatchpoint)) { + nop(); + result = m_buffer.label(); + } + return result; } AssemblerLabel align(int alignment) @@ -664,14 +691,24 @@ public: // Assembly helpers for moving data between fp and registers. void vmov(RegisterID rd1, RegisterID rd2, FPRegisterID rn) { +#if WTF_MIPS_ISA_REV(2) && WTF_MIPS_FP64 + mfc1(rd1, rn); + mfhc1(rd2, rn); +#else mfc1(rd1, rn); mfc1(rd2, FPRegisterID(rn + 1)); +#endif } void vmov(FPRegisterID rd, RegisterID rn1, RegisterID rn2) { +#if WTF_MIPS_ISA_REV(2) && WTF_MIPS_FP64 + mtc1(rn1, rd); + mthc1(rn2, rd); +#else mtc1(rn1, rd); mtc1(rn2, FPRegisterID(rd + 1)); +#endif } static unsigned getCallReturnOffset(AssemblerLabel call) @@ -688,6 +725,35 @@ public: // writable region of memory; to modify the code in an execute-only execuable // pool the 'repatch' and 'relink' methods should be used. + static size_t linkDirectJump(void* code, void* to) + { + MIPSWord* insn = reinterpret_cast<MIPSWord*>(reinterpret_cast<intptr_t>(code)); + size_t ops = 0; + int32_t slotAddr = reinterpret_cast<int>(insn) + 4; + int32_t toAddr = reinterpret_cast<int>(to); + + if ((slotAddr & 0xf0000000) != (toAddr & 0xf0000000)) { + // lui + *insn = 0x3c000000 | (MIPSRegisters::t9 << OP_SH_RT) | ((toAddr >> 16) & 0xffff); + ++insn; + // ori + *insn = 0x34000000 | (MIPSRegisters::t9 << OP_SH_RT) | (MIPSRegisters::t9 << OP_SH_RS) | (toAddr & 0xffff); + ++insn; + // jr + *insn = 0x00000008 | (MIPSRegisters::t9 << OP_SH_RS); + ++insn; + ops = 4 * sizeof(MIPSWord); + } else { + // j + *insn = 0x08000000 | ((toAddr & 0x0fffffff) >> 2); + ++insn; + ops = 2 * sizeof(MIPSWord); + } + // nop + *insn = 0x00000000; + return ops; + } + void linkJump(AssemblerLabel from, AssemblerLabel to) { ASSERT(to.isSet()); @@ -825,29 +891,36 @@ public: #endif } - static void revertJumpToMove(void* instructionStart, RegisterID rt, int imm) + static ptrdiff_t maxJumpReplacementSize() { - MIPSWord* insn = static_cast<MIPSWord*>(instructionStart) + 1; - ASSERT((*insn & 0xfc000000) == 0x34000000); - *insn = (*insn & 0xfc1f0000) | (imm & 0xffff); - cacheFlush(insn, sizeof(MIPSWord)); + return sizeof(MIPSWord) * 4; } - static void replaceWithJump(void* instructionStart, void* to) + static void revertJumpToMove(void* instructionStart, RegisterID rt, int imm) { - MIPSWord* instruction = reinterpret_cast<MIPSWord*>(instructionStart); - intptr_t jumpTo = reinterpret_cast<intptr_t>(to); + MIPSWord* insn = static_cast<MIPSWord*>(instructionStart); + size_t codeSize = 2 * sizeof(MIPSWord); // lui - instruction[0] = 0x3c000000 | (MIPSRegisters::t9 << OP_SH_RT) | ((jumpTo >> 16) & 0xffff); + *insn = 0x3c000000 | (rt << OP_SH_RT) | ((imm >> 16) & 0xffff); + ++insn; // ori - instruction[1] = 0x34000000 | (MIPSRegisters::t9 << OP_SH_RT) | (MIPSRegisters::t9 << OP_SH_RS) | (jumpTo & 0xffff); - // jr - instruction[2] = 0x00000008 | (MIPSRegisters::t9 << OP_SH_RS); - // nop - instruction[3] = 0x0; + *insn = 0x34000000 | (rt << OP_SH_RS) | (rt << OP_SH_RT) | (imm & 0xffff); + ++insn; + // if jr $t9 + if (*insn == 0x03200008) { + *insn = 0x00000000; + codeSize += sizeof(MIPSWord); + } + cacheFlush(insn, codeSize); + } - cacheFlush(instruction, sizeof(MIPSWord) * 4); + static void replaceWithJump(void* instructionStart, void* to) + { + ASSERT(!(bitwise_cast<uintptr_t>(instructionStart) & 3)); + ASSERT(!(bitwise_cast<uintptr_t>(to) & 3)); + size_t ops = linkDirectJump(instructionStart, to); + cacheFlush(instructionStart, ops); } static void replaceWithLoad(void* instructionStart) @@ -1023,6 +1096,8 @@ private: AssemblerBuffer m_buffer; Jumps m_jumps; + int m_indexOfLastWatchpoint; + int m_indexOfTailOfLastWatchpoint; }; } // namespace JSC |