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test-i386-ssse3.c

/* See if various MMX/SSE SSSE3 instructions give expected results */
#include <stdio.h>
#include <string.h>
#include <stdint.h>

int main(int argc, char *argv[]) {
      char hello[16];
      const char ehlo[8] = "EHLO    ";
      uint64_t mask = 0x8080800302020001;

      uint64_t a = 0x0000000000090007;
      uint64_t b = 0x0000000000000000;
      uint32_t c;
      uint16_t d;

      const char e[16] = "LLOaaaaaaaaaaaaa";
      const char f[16] = "aaaaaaaaaaaaaaHE";

      /* pshufb mm1/xmm1, mm2/xmm2 */
      asm volatile ("movq    (%0), %%mm0" : : "r" (ehlo) : "mm0", "mm1");
      asm volatile ("movq    %0, %%mm1" : : "m" (mask));
      asm volatile ("pshufb  %mm1, %mm0");
      asm volatile ("movq    %%mm0, %0" : "=m" (hello));
      printf("%s\n", hello);

      /* pshufb mm1/xmm1, m64/m128 */
      asm volatile ("movq    (%0), %%mm0" : : "r" (ehlo) : "mm0");
      asm volatile ("pshufb  %0, %%mm0" : : "m" (mask));
      asm volatile ("movq    %%mm0, %0" : "=m" (hello));
      printf("%s\n", hello);

      /* psubsw mm1/xmm1, m64/m128 */
      asm volatile ("movq    %0, %%mm0" : : "r" (a) : "mm0");
      asm volatile ("phsubsw %0, %%mm0" : : "m" (b));
      asm volatile ("movq    %%mm0, %0" : "=m" (a));
      printf("%i - %i = %i\n", 9, 7, -(int16_t) a);

      /* palignr mm1/xmm1, m64/m128, imm8 */
      asm volatile ("movdqa  (%0), %%xmm0" : : "r" (e) : "xmm0");
      asm volatile ("palignr $14, (%0), %%xmm0" : : "r" (f));
      asm volatile ("movdqa  %%xmm0, (%0)" : : "r" (hello));
      printf("%5.5s\n", hello);

#if 1 /* SSE4 */
      /* popcnt r64, r/m64 */
      asm volatile ("movq    $0x8421000010009c63, %%rax" : : : "rax");
      asm volatile ("popcnt  %%ax, %%dx" : : : "dx");
      asm volatile ("popcnt  %%eax, %%ecx" : : : "ecx");
      asm volatile ("popcnt  %rax, %rax");
      asm volatile ("movq    %%rax, %0" : "=m" (a));
      asm volatile ("movl    %%ecx, %0" : "=m" (c));
      asm volatile ("movw    %%dx, %0" : "=m" (d));
      printf("%i = %i\n%i = %i = %i\n", 13, (int) a, 9, c, d + 1);
#endif

      return 0;
}

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