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-rw-r--r--src/shader_recompiler/frontend/maxwell/translate/impl/find_leading_one.cpp25
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