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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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32
libc/intrin/memmove.c
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@ -93,6 +93,8 @@ void *memmove(void *dst, const void *src, size_t n) {
xmm_t v, w, x, y, V, W, X, Y, wut;
d = dst;
s = src;
#ifdef __x86__
if (IsTiny()) {
uint16_t w1, w2;
uint32_t l1, l2;
@ -133,6 +135,8 @@ void *memmove(void *dst, const void *src, size_t n) {
}
return dst;
}
#endif
switch (n) {
case 0:
return d;
@ -208,6 +212,8 @@ void *memmove(void *dst, const void *src, size_t n) {
return d;
default:
if (d == s) return d;
#ifdef __x86__
if (n < kHalfCache3 || !kHalfCache3) {
if (d > s) {
if (IsAsan() || n < 900 || !X86_HAVE(ERMS)) {
@ -280,6 +286,31 @@ void *memmove(void *dst, const void *src, size_t n) {
}
asm("sfence");
}
#else
if (d > s) {
do {
n -= 32;
v = *(const xmm_t *)(s + n);
w = *(const xmm_t *)(s + n + 16);
*(xmm_t *)(d + n) = v;
*(xmm_t *)(d + n + 16) = w;
} while (n >= 32);
} else {
i = 0;
do {
v = *(const xmm_t *)(s + i);
w = *(const xmm_t *)(s + i + 16);
*(xmm_t *)(d + i) = v;
*(xmm_t *)(d + i + 16) = w;
} while ((i += 32) + 32 <= n);
d += i;
s += i;
n -= i;
}
#endif
if (n) {
if (n >= 16) {
v = *(const xmm_t *)s;
@ -305,6 +336,7 @@ void *memmove(void *dst, const void *src, size_t n) {
*d = *s;
}
}
return dst;
}
}