tests/test-i386-ssse3.c

   1 /* See if various MMX/SSE SSSE3 instructions give expected results */
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 int main(int argc, char *argv[]) {
   6         char hello[16];
   7         const char ehlo[8] = "EHLO    ";
   8         uint64_t mask = 0x8080800302020001;
   9
  10         uint64_t a = 0x0000000000090007;
  11         uint64_t b = 0x0000000000000000;
  12
  13         const char c[16] = "LLOaaaaaaaaaaaaa";
  14         const char d[16] = "aaaaaaaaaaaaaaHE";
  15
  16         /* pshufb mm1/xmm1, mm2/xmm2 */
  17         asm volatile ("movq    (%0), %%mm0" : : "r" (ehlo) : "mm0", "mm1");
  18         asm volatile ("movq    %0, %%mm1" : : "m" (mask));
  19         asm volatile ("pshufb  %mm1, %mm0");
  20         asm volatile ("movq    %%mm0, %0" : "=m" (hello));
  21         printf("%s\n", hello);
  22
  23         /* pshufb mm1/xmm1, m64/m128 */
  24         asm volatile ("movq    (%0), %%mm0" : : "r" (ehlo) : "mm0");
  25         asm volatile ("pshufb  %0, %%mm0" : : "m" (mask));
  26         asm volatile ("movq    %%mm0, %0" : "=m" (hello));
  27         printf("%s\n", hello);
  28
  29         /* psubsw mm1/xmm1, m64/m128 */
  30         asm volatile ("movq    %0, %%mm0" : : "r" (a) : "mm0");
  31         asm volatile ("phsubsw %0, %%mm0" : : "m" (b));
  32         asm volatile ("movq    %%mm0, %0" : "=m" (a));
  33         printf("%i - %i = %i\n", 9, 7, -(int16_t) a);
  34
  35         /* palignr mm1/xmm1, m64/m128, imm8 */
  36         asm volatile ("movdqa  (%0), %%xmm0" : : "r" (c) : "xmm0");
  37         asm volatile ("palignr $14, (%0), %%xmm0" : : "r" (d));
  38         asm volatile ("movdqa  %%xmm0, (%0)" : : "r" (hello));
  39         printf("%5.5s\n", hello);
  40
  41         return 0;
  42 }