andre/cosmopolitan
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fix memcpy on sandybridge and ivybridge

Browse Source 
This bug impacts folks who purchased Intel chips made in 2011-2012.
We're now using `vxorps` instead of `vpxor` which is great since it
means we do not need to change `X86_HAVE(AVX)` to `X86_HAVE(AVX2)`,
because AVX2 is only available on Haswell and later.

Fixes #16
This commit is contained in:
Justine Tunney
2021-01-16 21:36:55 -08:00
parent 2ad0d05d31
commit 8fa47acecc
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
libc/nexgen32e/memcpy.S
View File

@@ -70,8 +70,8 @@ MemCpy: .leafprologue
cmp %rcx,%rdx cmp %rcx,%rdx
ja 0b ja 0b
vmovdqu %ymm4,-32(%rdi,%rdx) vmovdqu %ymm4,-32(%rdi,%rdx)
vpxor %ymm4,%ymm4,%ymm4 vxorps %ymm4,%ymm4,%ymm4
vpxor %ymm3,%ymm3,%ymm3 vxorps %ymm3,%ymm3,%ymm3
jmp .L0 jmp .L0
.L16r: cmp $1024,%rdx .L16r: cmp $1024,%rdx
jae .Lerms jae .Lerms