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shader_decode: Implement FMUL_C, FMUL_R and FMUL_IMM

This commit is contained in:
ReinUsesLisp 2018-12-20 23:54:47 -03:00
parent 4c70d5b8eb
commit 7c192ec43f
1 changed files with 42 additions and 0 deletions
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42
src/video_core/shader/decode/arithmetic.cpp
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@ -36,6 +36,48 @@ u32 ShaderIR::DecodeArithmetic(BasicBlock& bb, u32 pc) {
SetRegister(bb, instr.gpr0, op_b);
break;
}
case OpCode::Id::FMUL_C:
case OpCode::Id::FMUL_R:
case OpCode::Id::FMUL_IMM: {
// FMUL does not have 'abs' bits and only the second operand has a 'neg' bit.
UNIMPLEMENTED_IF_MSG(instr.fmul.tab5cb8_2 != 0, "FMUL tab5cb8_2({}) is not implemented",
instr.fmul.tab5cb8_2.Value());
UNIMPLEMENTED_IF_MSG(
instr.fmul.tab5c68_0 != 1, "FMUL tab5cb8_0({}) is not implemented",
instr.fmul.tab5c68_0.Value()); // SMO typical sends 1 here which seems to be the default
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in FMUL is not implemented");
op_b = GetOperandAbsNegFloat(op_b, false, instr.fmul.negate_b);
// TODO(Rodrigo): Should precise be used when there's a postfactor?
Node value = Operation(OperationCode::FMul, PRECISE, op_a, op_b);
if (instr.fmul.postfactor != 0) {
auto postfactor = static_cast<s32>(instr.fmul.postfactor);
// Postfactor encoded as 3-bit 1's complement in instruction, interpreted with below
// logic.
if (postfactor >= 4) {
postfactor = 7 - postfactor;
} else {
postfactor = 0 - postfactor;
}
if (postfactor > 0) {
value = Operation(OperationCode::FMul, NO_PRECISE, value,
Immediate(static_cast<f32>(1 << postfactor)));
} else {
value = Operation(OperationCode::FDiv, NO_PRECISE, value,
Immediate(static_cast<f32>(1 << -postfactor)));
}
}
value = GetSaturatedFloat(value, instr.alu.saturate_d);
SetRegister(bb, instr.gpr0, value);
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled arithmetic instruction: {}", opcode->get().GetName());
}