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authorbunnei <bunneidev@gmail.com>2022-10-05 00:52:39 +0200
committerGitHub <noreply@github.com>2022-10-05 00:52:39 +0200
commit92c0ad23eb3336d7f395968ace9aa4cd18e1d1b5 (patch)
tree856d7ba1596ec74c173ae33564ee05b67010a856 /src/video_core
parentMerge pull request #8955 from german77/amiibo-rewrite (diff)
parentmacro_jit_x64: fix miscompilation of bit extraction operations (diff)
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Diffstat (limited to 'src/video_core')
-rw-r--r--src/video_core/macro/macro_jit_x64.cpp46
1 files changed, 9 insertions, 37 deletions
diff --git a/src/video_core/macro/macro_jit_x64.cpp b/src/video_core/macro/macro_jit_x64.cpp
index aca25d902..3b55228b9 100644
--- a/src/video_core/macro/macro_jit_x64.cpp
+++ b/src/video_core/macro/macro_jit_x64.cpp
@@ -279,28 +279,13 @@ void MacroJITx64Impl::Compile_ExtractInsert(Macro::Opcode opcode) {
auto dst = Compile_GetRegister(opcode.src_a, RESULT);
auto src = Compile_GetRegister(opcode.src_b, eax);
- if (opcode.bf_src_bit != 0 && opcode.bf_src_bit != 31) {
- shr(src, opcode.bf_src_bit);
- } else if (opcode.bf_src_bit == 31) {
- xor_(src, src);
- }
- // Don't bother masking the whole register since we're using a 32 bit register
- if (opcode.bf_size != 31 && opcode.bf_size != 0) {
- and_(src, opcode.GetBitfieldMask());
- } else if (opcode.bf_size == 0) {
- xor_(src, src);
- }
- if (opcode.bf_dst_bit != 31 && opcode.bf_dst_bit != 0) {
- shl(src, opcode.bf_dst_bit);
- } else if (opcode.bf_dst_bit == 31) {
- xor_(src, src);
- }
-
const u32 mask = ~(opcode.GetBitfieldMask() << opcode.bf_dst_bit);
- if (mask != 0xffffffff) {
- and_(dst, mask);
- }
+ and_(dst, mask);
+ shr(src, opcode.bf_src_bit);
+ and_(src, opcode.GetBitfieldMask());
+ shl(src, opcode.bf_dst_bit);
or_(dst, src);
+
Compile_ProcessResult(opcode.result_operation, opcode.dst);
}
@@ -309,17 +294,9 @@ void MacroJITx64Impl::Compile_ExtractShiftLeftImmediate(Macro::Opcode opcode) {
const auto src = Compile_GetRegister(opcode.src_b, RESULT);
shr(src, dst.cvt8());
- if (opcode.bf_size != 0 && opcode.bf_size != 31) {
- and_(src, opcode.GetBitfieldMask());
- } else if (opcode.bf_size == 0) {
- xor_(src, src);
- }
+ and_(src, opcode.GetBitfieldMask());
+ shl(src, opcode.bf_dst_bit);
- if (opcode.bf_dst_bit != 0 && opcode.bf_dst_bit != 31) {
- shl(src, opcode.bf_dst_bit);
- } else if (opcode.bf_dst_bit == 31) {
- xor_(src, src);
- }
Compile_ProcessResult(opcode.result_operation, opcode.dst);
}
@@ -327,13 +304,8 @@ void MacroJITx64Impl::Compile_ExtractShiftLeftRegister(Macro::Opcode opcode) {
const auto dst = Compile_GetRegister(opcode.src_a, ecx);
const auto src = Compile_GetRegister(opcode.src_b, RESULT);
- if (opcode.bf_src_bit != 0) {
- shr(src, opcode.bf_src_bit);
- }
-
- if (opcode.bf_size != 31) {
- and_(src, opcode.GetBitfieldMask());
- }
+ shr(src, opcode.bf_src_bit);
+ and_(src, opcode.GetBitfieldMask());
shl(src, dst.cvt8());
Compile_ProcessResult(opcode.result_operation, opcode.dst);