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shader_decode: Implement FSET

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This commit is contained in:
ReinUsesLisp 2018-12-16 03:57:10 -03:00
parent 3052eae25e
commit e444a6553f
1 changed files with 36 additions and 1 deletions
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37
src/video_core/shader/decode/float_set.cpp
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@ -16,7 +16,42 @@ u32 ShaderIR::DecodeFloatSet(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.fset.abs_a != 0,
instr.fset.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.fset.abs_b != 0, instr.fset.neg_b != 0);
// The fset instruction sets a register to 1.0 or -1 (depending on the bf bit) if the
// condition is true, and to 0 otherwise.
const Node second_pred = GetPredicate(instr.fset.pred39, instr.fset.neg_pred != 0);
const OperationCode combiner = GetPredicateCombiner(instr.fset.op);
const Node first_pred = GetPredicateComparisonFloat(instr.fset.cond, op_a, op_b);
const Node predicate = Operation(combiner, first_pred, second_pred);
const Node true_value = instr.fset.bf ? Immediate(1.0f) : Immediate(-1);
const Node false_value = instr.fset.bf ? Immediate(0.0f) : Immediate(0);
const Node value =
Operation(OperationCode::Select, PRECISE, predicate, true_value, false_value);
SetRegister(bb, instr.gpr0, value);
if (instr.generates_cc.Value() != 0) {
const Node is_zero = Operation(OperationCode::LogicalFEqual, predicate, Immediate(0.0f));
SetInternalFlag(bb, InternalFlag::Zero, is_zero);
LOG_WARNING(HW_GPU, "FSET condition code is incomplete");
}
return pc;
}