1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
/* See if various MMX/SSE SSSE3 instructions give expected results */
#include <stdio.h>
#include <string.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;
const char c[16] = "LLOaaaaaaaaaaaaa";
const char d[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" (c) : "xmm0");
asm volatile ("palignr $14, (%0), %%xmm0" : : "r" (d));
asm volatile ("movdqa %%xmm0, (%0)" : : "r" (hello));
printf("%5.5s\n", hello);
return 0;
}
|
GitWeb
