X87: [turbofan] Add RoundUint32ToFloat32 operator to Turbofan.
port 187b3f2845
(r33796)
original commit message:
BUG=
Review URL: https://codereview.chromium.org/1700583002
Cr-Commit-Position: refs/heads/master@{#33967}
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@ -1114,6 +1114,49 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
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}
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break;
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}
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case kX87Uint32ToFloat32: {
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InstructionOperand* input = instr->InputAt(0);
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DCHECK(input->IsRegister() || input->IsStackSlot());
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if (FLAG_debug_code && FLAG_enable_slow_asserts) {
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__ VerifyX87StackDepth(1);
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}
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__ fstp(0);
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Label msb_set_src;
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Label jmp_return;
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// Put input integer into eax(tmporarilly)
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__ push(eax);
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if (input->IsRegister())
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__ mov(eax, i.InputRegister(0));
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else
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__ mov(eax, i.InputOperand(0));
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__ test(eax, eax);
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__ j(sign, &msb_set_src, Label::kNear);
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__ push(eax);
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__ fild_s(Operand(esp, 0));
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__ pop(eax);
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__ jmp(&jmp_return, Label::kNear);
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__ bind(&msb_set_src);
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// Need another temp reg
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__ push(ebx);
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__ mov(ebx, eax);
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__ shr(eax, 1);
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// Recover the least significant bit to avoid rounding errors.
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__ and_(ebx, Immediate(1));
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__ or_(eax, ebx);
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__ push(eax);
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__ fild_s(Operand(esp, 0));
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__ pop(eax);
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__ fld(0);
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__ faddp();
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// Restore the ebx
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__ pop(ebx);
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__ bind(&jmp_return);
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// Restore the eax
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__ pop(eax);
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break;
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}
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case kX87Int32ToFloat64: {
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InstructionOperand* input = instr->InputAt(0);
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DCHECK(input->IsRegister() || input->IsStackSlot());
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@ -54,6 +54,7 @@ namespace compiler {
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V(X87Float64Min) \
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V(X87Float64Abs) \
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V(X87Int32ToFloat32) \
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V(X87Uint32ToFloat32) \
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V(X87Int32ToFloat64) \
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V(X87Float32ToFloat64) \
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V(X87Uint32ToFloat64) \
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@ -86,7 +87,6 @@ namespace compiler {
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V(X87Poke) \
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V(X87StackCheck)
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// Addressing modes represent the "shape" of inputs to an instruction.
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// Many instructions support multiple addressing modes. Addressing modes
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// are encoded into the InstructionCode of the instruction and tell the
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@ -664,7 +664,9 @@ void InstructionSelector::VisitRoundInt32ToFloat32(Node* node) {
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void InstructionSelector::VisitRoundUint32ToFloat32(Node* node) {
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UNIMPLEMENTED();
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X87OperandGenerator g(this);
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Emit(kX87Uint32ToFloat32, g.DefineAsFixed(node, stX_0),
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g.Use(node->InputAt(0)));
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}
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