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authorNguyen Dac Nam <nam.kazt.91@gmail.com>2020-02-27 17:14:25 +0100
committerGitHub <noreply@github.com>2020-02-27 17:14:25 +0100
commitdb2f547434cd989bc76f3fc579be692e6756b006 (patch)
tree4138f7946834ef60a931dce7a4d70b6f6089fc62 /src/video_core/shader/decode/arithmetic.cpp
parentMerge pull request #3440 from namkazt/patch-6 (diff)
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Diffstat (limited to 'src/video_core/shader/decode/arithmetic.cpp')
-rw-r--r--src/video_core/shader/decode/arithmetic.cpp33
1 files changed, 14 insertions, 19 deletions
diff --git a/src/video_core/shader/decode/arithmetic.cpp b/src/video_core/shader/decode/arithmetic.cpp
index 90240c765..478394682 100644
--- a/src/video_core/shader/decode/arithmetic.cpp
+++ b/src/video_core/shader/decode/arithmetic.cpp
@@ -53,29 +53,24 @@ u32 ShaderIR::DecodeArithmetic(NodeBlock& bb, u32 pc) {
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);
+ static constexpr std::array FmulPostFactor = {
+ 1.000f, // None
+ 0.500f, // Divide 2
+ 0.250f, // Divide 4
+ 0.125f, // Divide 8
+ 8.000f, // Mul 8
+ 4.000f, // Mul 4
+ 2.000f, // Mul 2
+ };
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)));
- }
+ 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);
+
value = GetSaturatedFloat(value, instr.alu.saturate_d);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);