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#include "digestif.h"
#define u_long_s sizeof (unsigned long)
static inline void xor_into (uint8_t *src, uint8_t *dst, size_t n) {
#if defined (__digestif_SSE2__)
while (n >= 16) {
_mm_storeu_si128 (
(__m128i*) dst,
_mm_xor_si128 (
_mm_loadu_si128 ((__m128i*) src),
_mm_loadu_si128 ((__m128i*) dst)));
src += 16;
dst += 16;
n -= 16;
}
#endif
while (n >= u_long_s) {
*((u_long *) dst) ^= *((u_long *) src);
src += u_long_s;
dst += u_long_s;
n -= u_long_s;
}
while (n-- > 0) {
*dst = *(src ++) ^ *dst;
dst++;
}
}
CAMLprim value
caml_digestif_ba_xor_into (value b1, value off1, value b2, value off2, value n) {
xor_into (_ba_uint8_off (b1, off1), _ba_uint8_off (b2, off2), Int_val (n));
return Val_unit;
}
CAMLprim value
caml_digestif_st_xor_into (value b1, value off1, value b2, value off2, value n) {
xor_into (_st_uint8_off (b1, off1), _st_uint8_off (b2, off2), Int_val (n));
return Val_unit;
}
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