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#if __EMSCRIPTEN__
#include <stdint.h>
#endif
#include <string.h>
int memcmp(const void *vl, const void *vr, size_t n)
{
const unsigned char *l=vl, *r=vr;
// XXX EMSCRIPTEN: add an optimized version.
#if !defined(EMSCRIPTEN_OPTIMIZE_FOR_OZ) && !__has_feature(address_sanitizer)
// If we have enough bytes, and everything is aligned, loop on words instead
// of single bytes.
if (n >= 4 && !((((uintptr_t)l) & 3) | (((uintptr_t)r) & 3))) {
while (n >= 4) {
if (*((uint32_t *)l) != *((uint32_t *)r)) {
// Go to the single-byte loop to find the specific byte.
break;
}
l += 4;
r += 4;
n -= 4;
}
}
#endif
#if defined(EMSCRIPTEN_OPTIMIZE_FOR_OZ)
#pragma clang loop unroll(disable)
#endif
for (; n && *l == *r; n--, l++, r++);
return n ? *l-*r : 0;
}
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