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shader: FMUL apply LUT

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This commit is contained in:
Nguyen Dac Nam
2020-02-21 23:21:56 +07:00
committed by GitHub
parent bfb4950bd5
commit 793c5741fb
1 changed files with 5 additions and 20 deletions
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25
src/video_core/shader/decode/arithmetic.cpp
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@@ -53,29 +53,14 @@ u32 ShaderIR::DecodeArithmetic(NodeBlock& bb, u32 pc) {
op_b = GetOperandAbsNegFloat(op_b, false, instr.fmul.negate_b);
if (instr.fmul.postfactor != 0) {
op_a = Operation(OperationCode::FMul, NO_PRECISE, op_a,
Immediate(FmulPostFactor[instr.fmul.postfactor]));
}
// 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);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);