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Diffstat (limited to '')
| -rw-r--r-- | src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_multiply.cpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_multiply.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_multiply.cpp new file mode 100644 index 000000000..743a1e2f0 --- /dev/null +++ b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_multiply.cpp @@ -0,0 +1,108 @@ +// 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/frontend/ir/modifiers.h" +#include "shader_recompiler/frontend/maxwell/translate/impl/common_encoding.h" +#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h" + +namespace Shader::Maxwell { +namespace { +enum class Scale : u64 { + None, + D2, + D4, + D8, + M8, + M4, + M2, + INVALIDSCALE37, +}; + +float ScaleFactor(Scale scale) { + switch (scale) { + case Scale::None: + return 1.0f; + case Scale::D2: + return 1.0f / 2.0f; + case Scale::D4: + return 1.0f / 4.0f; + case Scale::D8: + return 1.0f / 8.0f; + case Scale::M8: + return 8.0f; + case Scale::M4: + return 4.0f; + case Scale::M2: + return 2.0f; + case Scale::INVALIDSCALE37: + break; + } + throw NotImplementedException("Invalid FMUL scale {}", scale); +} + +void FMUL(TranslatorVisitor& v, u64 insn, const IR::U32& src_b, FmzMode fmz_mode, + FpRounding fp_rounding, Scale scale, bool sat, bool cc, bool neg_b) { + union { + u64 raw; + BitField<0, 8, IR::Reg> dest_reg; + BitField<8, 8, IR::Reg> src_a; + } const fmul{insn}; + + if (cc) { + throw NotImplementedException("FMUL CC"); + } + if (sat) { + throw NotImplementedException("FMUL SAT"); + } + IR::U32 op_a{v.X(fmul.src_a)}; + if (scale != Scale::None) { + if (fmz_mode != FmzMode::FTZ || fp_rounding != FpRounding::RN) { + throw NotImplementedException("FMUL scale with non-FMZ or non-RN modifiers"); + } + op_a = v.ir.FPMul(op_a, v.ir.Imm32(ScaleFactor(scale))); + } + const IR::U32 op_b{v.ir.FPAbsNeg(src_b, false, neg_b)}; + const IR::FpControl fp_control{ + .no_contraction{true}, + .rounding{CastFpRounding(fp_rounding)}, + .fmz_mode{CastFmzMode(fmz_mode)}, + }; + v.X(fmul.dest_reg, v.ir.FPMul(op_a, op_b, fp_control)); +} + +void FMUL(TranslatorVisitor& v, u64 insn, const IR::U32& src_b) { + union { + u64 raw; + BitField<39, 2, FpRounding> fp_rounding; + BitField<41, 3, Scale> scale; + BitField<44, 2, FmzMode> fmz; + BitField<47, 1, u64> cc; + BitField<48, 1, u64> neg_b; + BitField<50, 1, u64> sat; + } fmul{insn}; + + FMUL(v, insn, src_b, fmul.fmz, fmul.fp_rounding, fmul.scale, fmul.sat != 0, fmul.cc != 0, + fmul.neg_b != 0); +} +} // Anonymous namespace + +void TranslatorVisitor::FMUL_reg(u64 insn) { + return FMUL(*this, insn, GetReg20(insn)); +} + +void TranslatorVisitor::FMUL_cbuf(u64) { + throw NotImplementedException("FMUL (cbuf)"); +} + +void TranslatorVisitor::FMUL_imm(u64) { + throw NotImplementedException("FMUL (imm)"); +} + +void TranslatorVisitor::FMUL32I(u64) { + throw NotImplementedException("FMUL32I"); +} + +} // namespace Shader::Maxwell
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