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/*
* XOR two pieces of memory, copying the result into a third, which
* may precisely alias one of the input pair (but no guarantees if it
* partially overlaps).
*/
#include "defs.h"
#include "misc.h"
void memxor(uint8_t *out, const uint8_t *in1, const uint8_t *in2, size_t size)
{
switch (size & 15) {
case 0:
while (size >= 16) {
size -= 16;
*out++ = *in1++ ^ *in2++;
case 15: *out++ = *in1++ ^ *in2++;
case 14: *out++ = *in1++ ^ *in2++;
case 13: *out++ = *in1++ ^ *in2++;
case 12: *out++ = *in1++ ^ *in2++;
case 11: *out++ = *in1++ ^ *in2++;
case 10: *out++ = *in1++ ^ *in2++;
case 9: *out++ = *in1++ ^ *in2++;
case 8: *out++ = *in1++ ^ *in2++;
case 7: *out++ = *in1++ ^ *in2++;
case 6: *out++ = *in1++ ^ *in2++;
case 5: *out++ = *in1++ ^ *in2++;
case 4: *out++ = *in1++ ^ *in2++;
case 3: *out++ = *in1++ ^ *in2++;
case 2: *out++ = *in1++ ^ *in2++;
case 1: *out++ = *in1++ ^ *in2++;
}
}
}
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