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gl_shader_decompiler: Let OpenGL interpret floats.

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- Accuracy is lost in translation to string, e.g. with NaN.
- Needed for Super Mario Odyssey.
This commit is contained in:
bunnei 2018-08-08 01:27:12 -04:00
parent 4fa3511a63
commit e542356d0c
2 changed files with 6 additions and 11 deletions
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13
src/video_core/engines/shader_bytecode.h
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@ -254,20 +254,15 @@ union Instruction {
BitField<56, 1, u64> invert_b; BitField<56, 1, u64> invert_b;
} lop32i; } lop32i;
float GetImm20_19() const { u32 GetImm20_19() const {
float result{};
u32 imm{static_cast<u32>(imm20_19)}; u32 imm{static_cast<u32>(imm20_19)};
imm <<= 12; imm <<= 12;
imm |= negate_imm ? 0x80000000 : 0; imm |= negate_imm ? 0x80000000 : 0;
std::memcpy(&result, &imm, sizeof(imm)); return imm;
return result;
} }
float GetImm20_32() const { u32 GetImm20_32() const {
float result{}; return static_cast<u32>(imm20_32);
s32 imm{static_cast<s32>(imm20_32)};
std::memcpy(&result, &imm, sizeof(imm));
return result;
} }
s32 GetSignedImm20_20() const { s32 GetSignedImm20_20() const {

4
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -602,12 +602,12 @@ private:
/// Generates code representing a 19-bit immediate value /// Generates code representing a 19-bit immediate value
static std::string GetImmediate19(const Instruction& instr) { static std::string GetImmediate19(const Instruction& instr) {
return std::to_string(instr.alu.GetImm20_19()); return fmt::format("uintBitsToFloat({})", instr.alu.GetImm20_19());
} }
/// Generates code representing a 32-bit immediate value /// Generates code representing a 32-bit immediate value
static std::string GetImmediate32(const Instruction& instr) { static std::string GetImmediate32(const Instruction& instr) {
return std::to_string(instr.alu.GetImm20_32()); return fmt::format("uintBitsToFloat({})", instr.alu.GetImm20_32());
} }
/// Generates code representing a texture sampler. /// Generates code representing a texture sampler.