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glasm: Implement IADD.CC
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@ -9,7 +9,32 @@
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namespace Shader::Backend::GLASM {
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void EmitIAdd32(EmitContext& ctx, IR::Inst& inst, ScalarS32 a, ScalarS32 b) {
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ctx.Add("ADD.S {}.x,{},{};", inst, a, b);
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const bool cc{inst.HasAssociatedPseudoOperation()};
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const std::string_view cc_mod{cc ? ".CC" : ""};
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if (cc) {
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ctx.reg_alloc.InvalidateConditionCodes();
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}
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const auto ret{ctx.reg_alloc.Define(inst)};
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ctx.Add("ADD.S{} {}.x,{},{};", cc_mod, ret, a, b);
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if (!cc) {
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return;
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}
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static constexpr std::array<std::string_view, 4> masks{"EQ", "SF", "CF", "OF"};
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const std::array flags{
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inst.GetAssociatedPseudoOperation(IR::Opcode::GetZeroFromOp),
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inst.GetAssociatedPseudoOperation(IR::Opcode::GetSignFromOp),
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inst.GetAssociatedPseudoOperation(IR::Opcode::GetCarryFromOp),
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inst.GetAssociatedPseudoOperation(IR::Opcode::GetOverflowFromOp),
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};
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for (size_t i = 0; i < flags.size(); ++i) {
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if (flags[i]) {
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const auto flag_ret{ctx.reg_alloc.Define(*flags[i])};
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ctx.Add("MOV.S {},0;"
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"MOV.S {}({}.x),-1;",
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flag_ret, flag_ret, masks[i]);
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flags[i]->Invalidate();
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}
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}
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}
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void EmitIAdd64([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] Register a,
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