qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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pack.c (469B)

      1 #include <unistd.h>
      2 
      3 int main(void)
      4 {
      5     char data[] = {0xaa, 0xaa, 0xf1, 0xf2, 0xf3, 0xc4, 0xaa, 0xaa};
      6     char exp[] = {0xaa, 0xaa, 0x00, 0x01, 0x23, 0x4c, 0xaa, 0xaa};
      7     int i;
      8 
      9     asm volatile(
     10         "    pack 2(4,%[data]),2(4,%[data])\n"
     11         :
     12         : [data] "a" (&data[0])
     13         : "memory");
     14     for (i = 0; i < 8; i++) {
     15         if (data[i] != exp[i]) {
     16             write(1, "bad data\n", 9);
     17             return 1;
     18         }
     19     }
     20     return 0;
     21 }