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glsl: Implement IADD CC
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453cd25da5
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@ -183,6 +183,8 @@ std::string EmitGLSL(const Profile& profile, const RuntimeInfo& runtime_info, IR
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for (size_t index = 0; index < ctx.reg_alloc.num_used_registers; ++index) {
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ctx.header += fmt::format("{} R{};", ctx.reg_alloc.reg_types[index], index);
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}
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// TODO: track CC usage
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ctx.header += "uint carry;";
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ctx.code.insert(0, ctx.header);
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ctx.code += "}";
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fmt::print("\n{}\n", ctx.code);
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@ -29,9 +29,22 @@ void SetSignFlag(EmitContext& ctx, IR::Inst& inst, std::string_view result) {
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} // Anonymous namespace
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void EmitIAdd32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b) {
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const auto result{ctx.reg_alloc.Define(inst, Type::U32)};
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ctx.Add("{}={}+{};", result, a, b);
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if (IR::Inst* const carry{inst.GetAssociatedPseudoOperation(IR::Opcode::GetCarryFromOp)}) {
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ctx.Add("{}=uaddCarry({},{},carry);", result, a, b);
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ctx.AddU1("{}=carry!=0;", *carry, result);
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carry->Invalidate();
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} else {
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ctx.Add("{}={}+{};", result, a, b);
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}
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SetZeroFlag(ctx, inst, result);
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SetSignFlag(ctx, inst, result);
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if (IR::Inst * overflow{inst.GetAssociatedPseudoOperation(IR::Opcode::GetOverflowFromOp)}) {
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// https://stackoverflow.com/questions/55468823/how-to-detect-integer-overflow-in-c
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constexpr u32 s32_max{static_cast<u32>(std::numeric_limits<s32>::max())};
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ctx.AddU1("{}=int({})>=0?int({})>int({}-{}):int({})<int({}-{});", *overflow, a, b, s32_max,
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a, b, s32_max, a);
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overflow->Invalidate();
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}
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}
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void EmitIAdd64(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b) {
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@ -179,7 +192,7 @@ void EmitSLessThan(EmitContext& ctx, IR::Inst& inst, std::string_view lhs, std::
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}
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void EmitULessThan(EmitContext& ctx, IR::Inst& inst, std::string_view lhs, std::string_view rhs) {
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ctx.AddU1("{}=uint({})<uint({)};", inst, lhs, rhs);
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ctx.AddU1("{}=uint({})<uint({});", inst, lhs, rhs);
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}
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void EmitIEqual(EmitContext& ctx, IR::Inst& inst, std::string_view lhs, std::string_view rhs) {
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