cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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test_addc.c (723B)

      1#include <stdio.h>
      2
      3int main(void)
      4{
      5    int a, b, c;
      6    int result;
      7
      8    b = 0x01;
      9    c = 0xffffffff;
     10    result = 0;
     11    __asm
     12    ("l.add r1, r1, r0\n\t" /* clear carry */
     13     "l.addc   %0, %1, %2\n\t"
     14     : "=r"(a)
     15     : "r"(b), "r"(c)
     16    );
     17    if (a != result) {
     18        printf("first addc error\n");
     19        return -1;
     20    }
     21
     22    b = 0x01;
     23    c = 0xffffffff;
     24    result = 0x80000001;
     25    __asm
     26    ("l.add r1, r1, r0\n\t" /* clear carry */
     27     "l.addc   %0, %1, %2\n\t"
     28     "l.movhi  %2, 0x7fff\n\t"
     29     "l.ori    %2, %2, 0xffff\n\t"
     30     "l.addc   %0, %1, %2\n\t"
     31     : "=r"(a)
     32     : "r"(b), "r"(c)
     33    );
     34    if (a != result) {
     35        printf("addc error\n");
     36        return -1;
     37    }
     38
     39    return 0;
     40}