diff options
| -rw-r--r-- | src/shader_recompiler/frontend/maxwell/translate/impl/find_leading_one.cpp | 25 |
1 files changed, 13 insertions, 12 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 index d5361bec5..f0cb25d61 100644 --- a/src/shader_recompiler/frontend/maxwell/translate/impl/find_leading_one.cpp +++ b/src/shader_recompiler/frontend/maxwell/translate/impl/find_leading_one.cpp @@ -8,26 +8,27 @@ namespace Shader::Maxwell { namespace { -void FLO(TranslatorVisitor& v, u64 insn, const IR::U32& src) { +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}; - const bool invert{flo.tilde != 0}; - const bool is_signed{flo.is_signed != 0}; - const bool shift_op{flo.shift != 0}; - - const IR::U32 operand{invert ? v.ir.BitwiseNot(src) : src}; - const IR::U32 find_result{is_signed ? v.ir.FindSMsb(operand) : v.ir.FindUMsb(operand)}; - const IR::U1 find_fail{v.ir.IEqual(find_result, v.ir.Imm32(-1))}; - const IR::U32 offset{v.ir.Imm32(31)}; - const IR::U32 success_result{shift_op ? IR::U32{v.ir.ISub(offset, find_result)} : find_result}; - - const IR::U32 result{v.ir.Select(find_fail, find_result, success_result)}; + 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 |