/* 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; }