diff options
Diffstat (limited to 'src/shader_recompiler/frontend/maxwell/translate/impl/find_leading_one.cpp')
-rw-r--r-- | src/shader_recompiler/frontend/maxwell/translate/impl/find_leading_one.cpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/find_leading_one.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/find_leading_one.cpp new file mode 100644 index 000000000..f0cb25d61 --- /dev/null +++ b/src/shader_recompiler/frontend/maxwell/translate/impl/find_leading_one.cpp @@ -0,0 +1,47 @@ +// 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/maxwell/translate/impl/impl.h" + +namespace Shader::Maxwell { +namespace { +void FLO(TranslatorVisitor& v, u64 insn, IR::U32 src) { + union { + u64 insn; + BitField<0, 8, IR::Reg> dest_reg; + BitField<40, 1, u64> tilde; + BitField<41, 1, u64> shift; + BitField<47, 1, u64> cc; + BitField<48, 1, u64> is_signed; + } const flo{insn}; + + if (flo.cc != 0) { + throw NotImplementedException("CC"); + } + if (flo.tilde != 0) { + src = v.ir.BitwiseNot(src); + } + IR::U32 result{flo.is_signed != 0 ? v.ir.FindSMsb(src) : v.ir.FindUMsb(src)}; + if (flo.shift != 0) { + const IR::U1 not_found{v.ir.IEqual(result, v.ir.Imm32(-1))}; + result = IR::U32{v.ir.Select(not_found, result, v.ir.BitwiseXor(result, v.ir.Imm32(31)))}; + } + v.X(flo.dest_reg, result); +} +} // Anonymous namespace + +void TranslatorVisitor::FLO_reg(u64 insn) { + FLO(*this, insn, GetReg20(insn)); +} + +void TranslatorVisitor::FLO_cbuf(u64 insn) { + FLO(*this, insn, GetCbuf(insn)); +} + +void TranslatorVisitor::FLO_imm(u64 insn) { + FLO(*this, insn, GetImm20(insn)); +} +} // namespace Shader::Maxwell |