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shader_decode: Implement FFMA

This commit is contained in:
ReinUsesLisp 2018-12-21 17:25:49 -03:00
parent 21aff36459
commit 148a6418ed
1 changed files with 36 additions and 1 deletions
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37
src/video_core/shader/decode/ffma.cpp
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@ -16,7 +16,42 @@ u32 ShaderIR::DecodeFfma(BasicBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED();
UNIMPLEMENTED_IF_MSG(instr.ffma.cc != 0, "FFMA cc not implemented");
UNIMPLEMENTED_IF_MSG(instr.ffma.tab5980_0 != 1, "FFMA tab5980_0({}) not implemented",
instr.ffma.tab5980_0.Value()); // Seems to be 1 by default based on SMO
UNIMPLEMENTED_IF_MSG(instr.ffma.tab5980_1 != 0, "FFMA tab5980_1({}) not implemented",
instr.ffma.tab5980_1.Value());
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in FFMA is not implemented");
const Node op_a = GetRegister(instr.gpr8);
auto [op_b, op_c] = [&]() -> std::tuple<Node, Node> {
switch (opcode->get().GetId()) {
case OpCode::Id::FFMA_CR: {
return {GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset),
GetRegister(instr.gpr39)};
}
case OpCode::Id::FFMA_RR:
return {GetRegister(instr.gpr20), GetRegister(instr.gpr39)};
case OpCode::Id::FFMA_RC: {
return {GetRegister(instr.gpr39),
GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset)};
}
case OpCode::Id::FFMA_IMM:
return {GetImmediate19(instr), GetRegister(instr.gpr39)};
default:
UNIMPLEMENTED_MSG("Unhandled FFMA instruction: {}", opcode->get().GetName());
}
}();
op_b = GetOperandAbsNegFloat(op_b, false, instr.ffma.negate_b);
op_c = GetOperandAbsNegFloat(op_c, false, instr.ffma.negate_c);
Node value = Operation(OperationCode::FFma, PRECISE, op_a, op_b, op_c);
value = GetSaturatedFloat(value, instr.alu.saturate_d);
SetRegister(bb, instr.gpr0, value);
return pc;
}