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Make progress towards aarch64 build

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This commit is contained in:
Justine Tunney 2023-05-01 19:43:59 -07:00
parent 08ff26c817
commit ca2860947f
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GPG key ID: BE714B4575D6E328
15428 changed files with 25694 additions and 23138 deletions
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8
libc/intrin/bzero.c
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@ -43,6 +43,7 @@ static dontinline antiquity void bzero_sse(char *p, size_t n) {
}
}
#ifdef __x86_64__
microarchitecture("avx") static void bzero_avx(char *p, size_t n) {
xmm_t v = {0};
if (IsAsan()) __asan_verify(p, n);
@ -73,6 +74,7 @@ microarchitecture("avx") static void bzero_avx(char *p, size_t n) {
*(xmm_t *)p = v;
}
}
#endif
/**
* Sets memory to zero.
@ -134,7 +136,11 @@ void bzero(void *p, size_t n) {
char *b;
uint64_t x;
b = p;
#ifdef __x86_64__
asm("xorl\t%k0,%k0" : "=r"(x));
#else
x = 0;
#endif
if (n <= 16) {
if (n >= 8) {
__builtin_memcpy(b, &x, 8);
@ -148,11 +154,13 @@ void bzero(void *p, size_t n) {
b[--n] = x;
} while (n);
}
#ifdef __x86_64__
} else if (IsTiny()) {
asm("rep stosb" : "+D"(b), "+c"(n), "=m"(*(char(*)[n])b) : "a"(0));
return;
} else if (X86_HAVE(AVX)) {
bzero_avx(b, n);
#endif
} else {
bzero_sse(b, n);
}