1 /* See if various MMX/SSE SSSE3 instructions give expected results */ 2 #include <stdio.h> 3 #include <string.h> 4 #include <stdint.h> 5 6 int main(int argc, char *argv[]) { 7 char hello[16]; 8 const char ehlo[8] = "EHLO "; 9 uint64_t mask = 0x8080800302020001; 10 11 uint64_t a = 0x0000000000090007; 12 uint64_t b = 0x0000000000000000; 13 uint32_t c; 14 uint16_t d; 15 16 const char e[16] = "LLOaaaaaaaaaaaaa"; 17 const char f[16] = "aaaaaaaaaaaaaaHE"; 18 19 /* pshufb mm1/xmm1, mm2/xmm2 */ 20 asm volatile ("movq (%0), %%mm0" : : "r" (ehlo) : "mm0", "mm1"); 21 asm volatile ("movq %0, %%mm1" : : "m" (mask)); 22 asm volatile ("pshufb %mm1, %mm0"); 23 asm volatile ("movq %%mm0, %0" : "=m" (hello)); 24 printf("%s\n", hello); 25 26 /* pshufb mm1/xmm1, m64/m128 */ 27 asm volatile ("movq (%0), %%mm0" : : "r" (ehlo) : "mm0"); 28 asm volatile ("pshufb %0, %%mm0" : : "m" (mask)); 29 asm volatile ("movq %%mm0, %0" : "=m" (hello)); 30 printf("%s\n", hello); 31 32 /* psubsw mm1/xmm1, m64/m128 */ 33 asm volatile ("movq %0, %%mm0" : : "r" (a) : "mm0"); 34 asm volatile ("phsubsw %0, %%mm0" : : "m" (b)); 35 asm volatile ("movq %%mm0, %0" : "=m" (a)); 36 printf("%i - %i = %i\n", 9, 7, -(int16_t) a); 37 38 /* palignr mm1/xmm1, m64/m128, imm8 */ 39 asm volatile ("movdqa (%0), %%xmm0" : : "r" (e) : "xmm0"); 40 asm volatile ("palignr $14, (%0), %%xmm0" : : "r" (f)); 41 asm volatile ("movdqa %%xmm0, (%0)" : : "r" (hello)); 42 printf("%5.5s\n", hello); 43 44 #if 1 /* SSE4 */ 45 /* popcnt r64, r/m64 */ 46 asm volatile ("movq $0x8421000010009c63, %%rax" : : : "rax"); 47 asm volatile ("popcnt %%ax, %%dx" : : : "dx"); 48 asm volatile ("popcnt %%eax, %%ecx" : : : "ecx"); 49 asm volatile ("popcnt %rax, %rax"); 50 asm volatile ("movq %%rax, %0" : "=m" (a)); 51 asm volatile ("movl %%ecx, %0" : "=m" (c)); 52 asm volatile ("movw %%dx, %0" : "=m" (d)); 53 printf("%i = %i\n%i = %i = %i\n", 13, (int) a, 9, c, d + 1); 54 #endif 55 56 return 0; 57 } 58