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mul64c.c
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#include <stdio.h>
#include <stdint.h>
int main() {
uint64_t s = 0xd;
uint64_t r;
for (uint64_t i = 0; i < 1048576*100; ++i) {
volatile unsigned v = 0;
uint64_t z = s + v;
uint64_t y = 0xd;
uint64_t x = 0xd;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x = z;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x = z;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x = z;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x = z;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x = z;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x = z;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x = z;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y; x *= y;
r = x;
}
return r == 0x780c7372621bd74d ? 0 : 1;
}