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shader_decode: Implement FSETP

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This commit is contained in:
ReinUsesLisp 2018-12-21 00:12:48 -03:00
parent 8215ae942c
commit c703f0aee4
1 changed files with 33 additions and 1 deletions
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34
src/video_core/shader/decode/float_set_predicate.cpp
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@ -11,12 +11,44 @@ namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Pred;
u32 ShaderIR::DecodeFloatSetPredicate(BasicBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED();
const Node op_a = GetOperandAbsNegFloat(GetRegister(instr.gpr8), instr.fsetp.abs_a != 0,
instr.fsetp.neg_a != 0);
Node op_b = [&]() {
if (instr.is_b_imm) {
return GetImmediate19(instr);
} else if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
op_b = GetOperandAbsNegFloat(op_b, instr.fsetp.abs_b, false);
// We can't use the constant predicate as destination.
ASSERT(instr.fsetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
const Node predicate = GetPredicateComparisonFloat(instr.fsetp.cond, op_a, op_b);
const Node second_pred = GetPredicate(instr.fsetp.pred39, instr.fsetp.neg_pred != 0);
const OperationCode combiner = GetPredicateCombiner(instr.fsetp.op);
const Node value = Operation(combiner, predicate, second_pred);
// Set the primary predicate to the result of Predicate OP SecondPredicate
SetPredicate(bb, instr.fsetp.pred3, value);
if (instr.fsetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
// Set the secondary predicate to the result of !Predicate OP SecondPredicate,
// if enabled
const Node negated_pred = Operation(OperationCode::LogicalNegate, predicate);
const Node second_value = Operation(combiner, negated_pred, second_pred);
SetPredicate(bb, instr.fsetp.pred0, second_value);
}
return pc;
}