diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch')
| -rw-r--r-- | sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S b/sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S index 47630dd97b..9d1921033e 100644 --- a/sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S +++ b/sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S @@ -137,18 +137,18 @@ L(exit): .p2align 4 L(between_2_3): - /* Load as big endian with overlapping loads and bswap to avoid - branches. */ - movzwl -2(%rdi, %rdx), %eax - movzwl -2(%rsi, %rdx), %ecx - shll $16, %eax - shll $16, %ecx - movzwl (%rdi), %edi - movzwl (%rsi), %esi - orl %edi, %eax - orl %esi, %ecx + /* Load as big endian to avoid branches. */ + movzwl (%rdi), %eax + movzwl (%rsi), %ecx + shll $8, %eax + shll $8, %ecx bswap %eax bswap %ecx + movzbl -1(%rdi, %rdx), %edi + movzbl -1(%rsi, %rdx), %esi + orl %edi, %eax + orl %esi, %ecx + /* Subtraction is okay because the upper 8 bits a zero. */ subl %ecx, %eax ret |