suyu/dynarmic
26
1
Fork 1
Code Issues Pull requests Projects Releases Packages Wiki Activity

Merge pull request #563 from Wunkolo/patch-1

Browse source 
emit_x64_vector: Fix ArithmeticShiftRightByte zero_extend constant
This commit is contained in:
LC 2020-11-09 20:31:21 -05:00 committed by GitHub
commit 96e9075804
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/backend/x64/emit_x64_vector.cpp
View file

@ -442,7 +442,7 @@ static void ArithmeticShiftRightByte(EmitContext& ctx, BlockOfCode& code, const
if (code.HasAVX512_Icelake()) { if (code.HasAVX512_Icelake()) {
// Do a logical shift right upon the 8x8 bit-matrix, but shift in // Do a logical shift right upon the 8x8 bit-matrix, but shift in
// `0x80` bytes into the matrix to repeat the most significant bit. // `0x80` bytes into the matrix to repeat the most significant bit.
const u64 zero_extend = ~(0xFFFFFFFFFFFFFFFF << shift_amount) & 0x8080808080808080; const u64 zero_extend = ~(0xFFFFFFFFFFFFFFFF << (shift_amount * 8)) & 0x8080808080808080;
const u64 shift_matrix = (0x0102040810204080 >> (shift_amount * 8)) | zero_extend; const u64 shift_matrix = (0x0102040810204080 >> (shift_amount * 8)) | zero_extend;
code.vgf2p8affineqb(result, result, code.MConst(xword_b, shift_matrix), 0); code.vgf2p8affineqb(result, result, code.MConst(xword_b, shift_matrix), 0);
return; return;