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shader/arithmetic_integer: Implement IADD.X
IADD.X takes the carry flag and adds it to the result. This is generally used to emulate 64-bit operations with 32-bit registers.
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@ -813,6 +813,10 @@ union Instruction {
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BitField<49, 1, u64> negate_a;
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} alu_integer;
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union {
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BitField<43, 1, u64> x;
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} iadd;
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union {
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BitField<39, 1, u64> ftz;
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BitField<32, 1, u64> saturate;
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@ -42,6 +42,12 @@ u32 ShaderIR::DecodeArithmeticInteger(NodeBlock& bb, u32 pc) {
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Node value = Operation(OperationCode::IAdd, op_a, op_b);
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if (instr.iadd.x) {
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Node carry = GetInternalFlag(InternalFlag::Carry);
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Node x = Operation(OperationCode::Select, std::move(carry), Immediate(1), Immediate(0));
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value = Operation(OperationCode::IAdd, std::move(value), std::move(x));
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}
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if (instr.generates_cc) {
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const Node i0 = Immediate(0);
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