73 lines · cpp
1#include <cinttypes>2#include <cstdint>3#include <cstdio>4 5union alignas(16) xmm_t {6 uint64_t as_uint64[2];7 uint8_t as_uint8[16];8};9 10int main() {11 constexpr xmm_t xmm_fill = {12 .as_uint64 = { 0, 0 }13 };14 15 uint64_t mm[8];16 xmm_t xmm[8];17 18 asm volatile(19 "movq %2, %%mm0\n\t"20 "movq %2, %%mm1\n\t"21 "movq %2, %%mm2\n\t"22 "movq %2, %%mm3\n\t"23 "movq %2, %%mm4\n\t"24 "movq %2, %%mm5\n\t"25 "movq %2, %%mm6\n\t"26 "movq %2, %%mm7\n\t"27 "\n\t"28 "movaps %2, %%xmm0\n\t"29 "movaps %2, %%xmm1\n\t"30 "movaps %2, %%xmm2\n\t"31 "movaps %2, %%xmm3\n\t"32 "movaps %2, %%xmm4\n\t"33 "movaps %2, %%xmm5\n\t"34 "movaps %2, %%xmm6\n\t"35 "movaps %2, %%xmm7\n\t"36 "\n\t"37 "int3\n\t"38 "\n\t"39 "movq %%mm0, 0x00(%0)\n\t"40 "movq %%mm1, 0x08(%0)\n\t"41 "movq %%mm2, 0x10(%0)\n\t"42 "movq %%mm3, 0x18(%0)\n\t"43 "movq %%mm4, 0x20(%0)\n\t"44 "movq %%mm5, 0x28(%0)\n\t"45 "movq %%mm6, 0x30(%0)\n\t"46 "movq %%mm7, 0x38(%0)\n\t"47 "\n\t"48 "movaps %%xmm0, 0x00(%1)\n\t"49 "movaps %%xmm1, 0x10(%1)\n\t"50 "movaps %%xmm2, 0x20(%1)\n\t"51 "movaps %%xmm3, 0x30(%1)\n\t"52 "movaps %%xmm4, 0x40(%1)\n\t"53 "movaps %%xmm5, 0x50(%1)\n\t"54 "movaps %%xmm6, 0x60(%1)\n\t"55 "movaps %%xmm7, 0x70(%1)\n\t"56 :57 : "a"(mm), "b"(xmm), "m"(xmm_fill)58 : "%mm0", "%mm1", "%mm2", "%mm3", "%mm4", "%mm5", "%mm6", "%mm7", "%xmm0",59 "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7"60 );61 62 for (int i = 0; i < 8; ++i)63 printf("mm%d = 0x%016" PRIx64 "\n", i, mm[i]);64 for (int i = 0; i < 8; ++i) {65 printf("xmm%d = { ", i);66 for (int j = 0; j < sizeof(xmm->as_uint8); ++j)67 printf("0x%02x ", xmm[i].as_uint8[j]);68 printf("}\n");69 }70 71 return 0;72}73