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authorReinUsesLisp <reinuseslisp@airmail.cc>2021-02-22 03:42:38 +0100
committerameerj <52414509+ameerj@users.noreply.github.com>2021-07-23 03:51:22 +0200
commit274897dfd59b4d08029ab7e93be4f84654abcdc8 (patch)
tree083336a4d665476a87b888368878a311a7edab2a /src/shader_recompiler/frontend/maxwell/translate/impl/impl.cpp
parentshader: Rename, implement FADD.SAT and P2R (imm) (diff)
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Diffstat (limited to 'src/shader_recompiler/frontend/maxwell/translate/impl/impl.cpp')
-rw-r--r--src/shader_recompiler/frontend/maxwell/translate/impl/impl.cpp15
1 files changed, 9 insertions, 6 deletions
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/impl.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/impl.cpp
index be17bb0d9..165d475b9 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/impl.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/impl.cpp
@@ -83,9 +83,12 @@ IR::U32 TranslatorVisitor::GetImm20(u64 insn) {
BitField<20, 19, u64> value;
BitField<56, 1, u64> is_negative;
} const imm{insn};
- const s32 positive_value{static_cast<s32>(imm.value)};
- const s32 value{imm.is_negative != 0 ? -positive_value : positive_value};
- return ir.Imm32(value);
+ if (imm.is_negative != 0) {
+ const s64 raw{static_cast<s64>(imm.value)};
+ return ir.Imm32(static_cast<s32>(-(1LL << 19) + raw));
+ } else {
+ return ir.Imm32(static_cast<u32>(imm.value));
+ }
}
IR::F32 TranslatorVisitor::GetFloatImm20(u64 insn) {
@@ -94,9 +97,9 @@ IR::F32 TranslatorVisitor::GetFloatImm20(u64 insn) {
BitField<20, 19, u64> value;
BitField<56, 1, u64> is_negative;
} const imm{insn};
- const f32 positive_value{Common::BitCast<f32>(static_cast<u32>(imm.value) << 12)};
- const f32 value{imm.is_negative != 0 ? -positive_value : positive_value};
- return ir.Imm32(value);
+ const u32 sign_bit{imm.is_negative != 0 ? (1ULL << 31) : 0};
+ const u32 value{static_cast<u32>(imm.value) << 12};
+ return ir.Imm32(Common::BitCast<f32>(value | sign_bit));
}
IR::U32 TranslatorVisitor::GetImm32(u64 insn) {