mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-26 22:38:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Make more code aarch64 friendly

Browse source
This commit is contained in:
Justine Tunney 2023-05-02 13:38:16 -07:00
parent ca2860947f
commit 2b73e72d59
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
568 changed files with 2197 additions and 1061 deletions
Download patch file Download diff file Expand all files Collapse all files

7
libc/str/timingsafe_bcmp.c
View file

@ -41,6 +41,7 @@ noasan static dontinline antiquity unsigned timingsafe_bcmp_sse(const char *p,
return w | w >> 32;
}
#ifdef __x86_64__
noasan static microarchitecture("avx") int timingsafe_bcmp_avx(const char *p,
const char *q,
size_t n) {
@ -74,6 +75,7 @@ noasan static microarchitecture("avx") int timingsafe_bcmp_avx(const char *p,
w = a[0] | a[1];
return w | w >> 32;
}
#endif
/**
* Tests inequality of first 𝑛 bytes of 𝑝 and 𝑞.
@ -140,11 +142,12 @@ int timingsafe_bcmp(const void *a, const void *b, size_t n) {
__asan_verify(a, n);
__asan_verify(b, n);
}
#ifdef __x86_64__
if (X86_HAVE(AVX)) {
return timingsafe_bcmp_avx(p, q, n);
} else {
return timingsafe_bcmp_sse(p, q, n);
}
#endif
return timingsafe_bcmp_sse(p, q, n);
}
} else if (n >= 4) {
__builtin_memcpy(&u0, p, 4);