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Diffstat (limited to 'js/src/jit/mips64/Assembler-mips64.cpp')
-rw-r--r--js/src/jit/mips64/Assembler-mips64.cpp186
1 files changed, 4 insertions, 182 deletions
diff --git a/js/src/jit/mips64/Assembler-mips64.cpp b/js/src/jit/mips64/Assembler-mips64.cpp
index 4d251f152..4f3eac094 100644
--- a/js/src/jit/mips64/Assembler-mips64.cpp
+++ b/js/src/jit/mips64/Assembler-mips64.cpp
@@ -87,7 +87,9 @@ js::jit::SA(FloatRegister r)
void
jit::PatchJump(CodeLocationJump& jump_, CodeLocationLabel label, ReprotectCode reprotect)
{
- Instruction* inst = (Instruction*)jump_.raw();
+ Instruction* inst;
+
+ inst = AssemblerMIPSShared::GetInstructionImmediateFromJump((Instruction*)jump_.raw());
// Six instructions used in load 64-bit imm.
MaybeAutoWritableJitCode awjc(inst, 6 * sizeof(uint32_t), reprotect);
@@ -125,23 +127,6 @@ jit::PatchBackedge(CodeLocationJump& jump, CodeLocationLabel label,
}
}
-void
-Assembler::executableCopy(uint8_t* buffer)
-{
- MOZ_ASSERT(isFinished);
- m_buffer.executableCopy(buffer);
-
- // Patch all long jumps during code copy.
- for (size_t i = 0; i < longJumps_.length(); i++) {
- Instruction* inst = (Instruction*) ((uintptr_t)buffer + longJumps_[i]);
-
- uint64_t value = Assembler::ExtractLoad64Value(inst);
- Assembler::UpdateLoad64Value(inst, (uint64_t)buffer + value);
- }
-
- AutoFlushICache::setRange(uintptr_t(buffer), m_buffer.size());
-}
-
uintptr_t
Assembler::GetPointer(uint8_t* instPtr)
{
@@ -243,155 +228,6 @@ Assembler::Bind(uint8_t* rawCode, CodeOffset* label, const void* address)
}
}
-void
-Assembler::bind(InstImm* inst, uintptr_t branch, uintptr_t target)
-{
- int64_t offset = target - branch;
- InstImm inst_bgezal = InstImm(op_regimm, zero, rt_bgezal, BOffImm16(0));
- InstImm inst_beq = InstImm(op_beq, zero, zero, BOffImm16(0));
-
- // If encoded offset is 4, then the jump must be short
- if (BOffImm16(inst[0]).decode() == 4) {
- MOZ_ASSERT(BOffImm16::IsInRange(offset));
- inst[0].setBOffImm16(BOffImm16(offset));
- inst[1].makeNop();
- return;
- }
-
- // Generate the long jump for calls because return address has to be the
- // address after the reserved block.
- if (inst[0].encode() == inst_bgezal.encode()) {
- addLongJump(BufferOffset(branch));
- Assembler::WriteLoad64Instructions(inst, ScratchRegister, target);
- inst[4] = InstReg(op_special, ScratchRegister, zero, ra, ff_jalr).encode();
- // There is 1 nop after this.
- return;
- }
-
- if (BOffImm16::IsInRange(offset)) {
- // Don't skip trailing nops can improve performance
- // on Loongson3 platform.
- bool skipNops = !isLoongson() && (inst[0].encode() != inst_bgezal.encode() &&
- inst[0].encode() != inst_beq.encode());
-
- inst[0].setBOffImm16(BOffImm16(offset));
- inst[1].makeNop();
-
- if (skipNops) {
- inst[2] = InstImm(op_regimm, zero, rt_bgez, BOffImm16(5 * sizeof(uint32_t))).encode();
- // There are 4 nops after this
- }
- return;
- }
-
- if (inst[0].encode() == inst_beq.encode()) {
- // Handle long unconditional jump.
- addLongJump(BufferOffset(branch));
- Assembler::WriteLoad64Instructions(inst, ScratchRegister, target);
- inst[4] = InstReg(op_special, ScratchRegister, zero, zero, ff_jr).encode();
- // There is 1 nop after this.
- } else {
- // Handle long conditional jump.
- inst[0] = invertBranch(inst[0], BOffImm16(7 * sizeof(uint32_t)));
- // No need for a "nop" here because we can clobber scratch.
- addLongJump(BufferOffset(branch + sizeof(uint32_t)));
- Assembler::WriteLoad64Instructions(&inst[1], ScratchRegister, target);
- inst[5] = InstReg(op_special, ScratchRegister, zero, zero, ff_jr).encode();
- // There is 1 nop after this.
- }
-}
-
-void
-Assembler::bind(RepatchLabel* label)
-{
- BufferOffset dest = nextOffset();
- if (label->used() && !oom()) {
- // If the label has a use, then change this use to refer to
- // the bound label;
- BufferOffset b(label->offset());
- InstImm* inst = (InstImm*)editSrc(b);
- InstImm inst_beq = InstImm(op_beq, zero, zero, BOffImm16(0));
- uint64_t offset = dest.getOffset() - label->offset();
-
- // If first instruction is lui, then this is a long jump.
- // If second instruction is lui, then this is a loop backedge.
- if (inst[0].extractOpcode() == (uint32_t(op_lui) >> OpcodeShift)) {
- // For unconditional long branches generated by ma_liPatchable,
- // such as under:
- // jumpWithpatch
- Assembler::UpdateLoad64Value(inst, dest.getOffset());
- } else if (inst[1].extractOpcode() == (uint32_t(op_lui) >> OpcodeShift) ||
- BOffImm16::IsInRange(offset))
- {
- // Handle code produced by:
- // backedgeJump
- // branchWithCode
- MOZ_ASSERT(BOffImm16::IsInRange(offset));
- MOZ_ASSERT(inst[0].extractOpcode() == (uint32_t(op_beq) >> OpcodeShift) ||
- inst[0].extractOpcode() == (uint32_t(op_bne) >> OpcodeShift) ||
- inst[0].extractOpcode() == (uint32_t(op_blez) >> OpcodeShift) ||
- inst[0].extractOpcode() == (uint32_t(op_bgtz) >> OpcodeShift));
- inst[0].setBOffImm16(BOffImm16(offset));
- } else if (inst[0].encode() == inst_beq.encode()) {
- // Handle open long unconditional jumps created by
- // MacroAssemblerMIPSShared::ma_b(..., wasm::Trap, ...).
- // We need to add it to long jumps array here.
- // See MacroAssemblerMIPS64::branchWithCode().
- MOZ_ASSERT(inst[1].encode() == NopInst);
- MOZ_ASSERT(inst[2].encode() == NopInst);
- MOZ_ASSERT(inst[3].encode() == NopInst);
- MOZ_ASSERT(inst[4].encode() == NopInst);
- MOZ_ASSERT(inst[5].encode() == NopInst);
- addLongJump(BufferOffset(label->offset()));
- Assembler::WriteLoad64Instructions(inst, ScratchRegister, dest.getOffset());
- inst[4] = InstReg(op_special, ScratchRegister, zero, zero, ff_jr).encode();
- } else {
- // Handle open long conditional jumps created by
- // MacroAssemblerMIPSShared::ma_b(..., wasm::Trap, ...).
- inst[0] = invertBranch(inst[0], BOffImm16(7 * sizeof(uint32_t)));
- // No need for a "nop" here because we can clobber scratch.
- // We need to add it to long jumps array here.
- // See MacroAssemblerMIPS64::branchWithCode().
- MOZ_ASSERT(inst[1].encode() == NopInst);
- MOZ_ASSERT(inst[2].encode() == NopInst);
- MOZ_ASSERT(inst[3].encode() == NopInst);
- MOZ_ASSERT(inst[4].encode() == NopInst);
- MOZ_ASSERT(inst[5].encode() == NopInst);
- MOZ_ASSERT(inst[6].encode() == NopInst);
- addLongJump(BufferOffset(label->offset() + sizeof(uint32_t)));
- Assembler::WriteLoad64Instructions(&inst[1], ScratchRegister, dest.getOffset());
- inst[5] = InstReg(op_special, ScratchRegister, zero, zero, ff_jr).encode();
- }
- }
- label->bind(dest.getOffset());
-}
-
-uint32_t
-Assembler::PatchWrite_NearCallSize()
-{
- // Load an address needs 4 instructions, and a jump with a delay slot.
- return (4 + 2) * sizeof(uint32_t);
-}
-
-void
-Assembler::PatchWrite_NearCall(CodeLocationLabel start, CodeLocationLabel toCall)
-{
- Instruction* inst = (Instruction*) start.raw();
- uint8_t* dest = toCall.raw();
-
- // Overwrite whatever instruction used to be here with a call.
- // Always use long jump for two reasons:
- // - Jump has to be the same size because of PatchWrite_NearCallSize.
- // - Return address has to be at the end of replaced block.
- // Short jump wouldn't be more efficient.
- Assembler::WriteLoad64Instructions(inst, ScratchRegister, (uint64_t)dest);
- inst[4] = InstReg(op_special, ScratchRegister, zero, ra, ff_jalr);
- inst[5] = InstNOP();
-
- // Ensure everyone sees the code that was just written into memory.
- AutoFlushICache::flush(uintptr_t(inst), PatchWrite_NearCallSize());
-}
-
uint64_t
Assembler::ExtractLoad64Value(Instruction* inst0)
{
@@ -453,19 +289,6 @@ Assembler::UpdateLoad64Value(Instruction* inst0, uint64_t value)
}
void
-Assembler::WriteLoad64Instructions(Instruction* inst0, Register reg, uint64_t value)
-{
- Instruction* inst1 = inst0->next();
- Instruction* inst2 = inst1->next();
- Instruction* inst3 = inst2->next();
-
- *inst0 = InstImm(op_lui, zero, reg, Imm16::Lower(Imm32(value >> 32)));
- *inst1 = InstImm(op_ori, reg, reg, Imm16::Upper(Imm32(value)));
- *inst2 = InstReg(op_special, rs_one, reg, reg, 48 - 32, ff_dsrl32);
- *inst3 = InstImm(op_ori, reg, reg, Imm16::Lower(Imm32(value)));
-}
-
-void
Assembler::PatchDataWithValueCheck(CodeLocationLabel label, ImmPtr newValue,
ImmPtr expectedValue)
{
@@ -492,8 +315,7 @@ Assembler::PatchDataWithValueCheck(CodeLocationLabel label, PatchedImmPtr newVal
void
Assembler::PatchInstructionImmediate(uint8_t* code, PatchedImmPtr imm)
{
- InstImm* inst = (InstImm*)code;
- Assembler::UpdateLoad64Value(inst, (uint64_t)imm.value);
+ Assembler::UpdateLoad64Value((Instruction*)code, (uint64_t)imm.value);
}
uint64_t
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 19:47:00 +0000