diff options
Diffstat (limited to '')
-rw-r--r-- | src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_multi_function.cpp | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_multi_function.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_multi_function.cpp new file mode 100644 index 000000000..e2ab0dab2 --- /dev/null +++ b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_multi_function.cpp @@ -0,0 +1,71 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/bit_field.h" +#include "common/common_types.h" +#include "shader_recompiler/exception.h" +#include "shader_recompiler/frontend/maxwell/opcode.h" +#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h" + +namespace Shader::Maxwell { +namespace { +enum class Operation { + Cos = 0, + Sin = 1, + Ex2 = 2, // Base 2 exponent + Lg2 = 3, // Base 2 logarithm + Rcp = 4, // Reciprocal + Rsq = 5, // Reciprocal square root + Rcp64H = 6, // 64-bit reciprocal + Rsq64H = 7, // 64-bit reciprocal square root + Sqrt = 8, +}; +} // Anonymous namespace + +void TranslatorVisitor::MUFU(u64 insn) { + // MUFU is used to implement a bunch of special functions. See Operation. + union { + u64 raw; + BitField<0, 8, IR::Reg> dest_reg; + BitField<8, 8, IR::Reg> src_reg; + BitField<20, 4, Operation> operation; + BitField<46, 1, u64> abs; + BitField<48, 1, u64> neg; + BitField<50, 1, u64> sat; + } const mufu{insn}; + + const IR::U32 op_a{ir.FPAbsNeg(X(mufu.src_reg), mufu.abs != 0, mufu.neg != 0)}; + IR::U32 value{[&]() -> IR::U32 { + switch (mufu.operation) { + case Operation::Cos: + return ir.FPCosNotReduced(op_a); + case Operation::Sin: + return ir.FPSinNotReduced(op_a); + case Operation::Ex2: + return ir.FPExp2NotReduced(op_a); + case Operation::Lg2: + return ir.FPLog2(op_a); + case Operation::Rcp: + return ir.FPRecip(op_a); + case Operation::Rsq: + return ir.FPRecipSqrt(op_a); + case Operation::Rcp64H: + throw NotImplementedException("MUFU.RCP64H"); + case Operation::Rsq64H: + throw NotImplementedException("MUFU.RSQ64H"); + case Operation::Sqrt: + return ir.FPSqrt(op_a); + default: + throw NotImplementedException("Invalid MUFU operation {}", mufu.operation.Value()); + } + }()}; + + if (mufu.sat) { + value = ir.FPSaturate(value); + } + + X(mufu.dest_reg, value); +} + +} // namespace Shader::Maxwell |