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shader_decode: Implement FSETP
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@ -11,12 +11,44 @@ namespace VideoCommon::Shader {
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using Tegra::Shader::Instruction;
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using Tegra::Shader::OpCode;
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using Tegra::Shader::Pred;
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u32 ShaderIR::DecodeFloatSetPredicate(BasicBlock& bb, u32 pc) {
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const Instruction instr = {program_code[pc]};
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const auto opcode = OpCode::Decode(instr);
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UNIMPLEMENTED();
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const Node op_a = GetOperandAbsNegFloat(GetRegister(instr.gpr8), instr.fsetp.abs_a != 0,
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instr.fsetp.neg_a != 0);
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Node op_b = [&]() {
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if (instr.is_b_imm) {
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return GetImmediate19(instr);
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} else if (instr.is_b_gpr) {
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return GetRegister(instr.gpr20);
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} else {
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return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
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}
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}();
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op_b = GetOperandAbsNegFloat(op_b, instr.fsetp.abs_b, false);
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// We can't use the constant predicate as destination.
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ASSERT(instr.fsetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
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const Node predicate = GetPredicateComparisonFloat(instr.fsetp.cond, op_a, op_b);
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const Node second_pred = GetPredicate(instr.fsetp.pred39, instr.fsetp.neg_pred != 0);
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const OperationCode combiner = GetPredicateCombiner(instr.fsetp.op);
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const Node value = Operation(combiner, predicate, second_pred);
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// Set the primary predicate to the result of Predicate OP SecondPredicate
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SetPredicate(bb, instr.fsetp.pred3, value);
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if (instr.fsetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
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// Set the secondary predicate to the result of !Predicate OP SecondPredicate,
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// if enabled
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const Node negated_pred = Operation(OperationCode::LogicalNegate, predicate);
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const Node second_value = Operation(combiner, negated_pred, second_pred);
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SetPredicate(bb, instr.fsetp.pred0, second_value);
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}
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return pc;
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}
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