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 r64[8];16 xmm_t xmm[8];17 18 asm volatile(19 "movq %2, %%r8\n\t"20 "movq %2, %%r9\n\t"21 "movq %2, %%r10\n\t"22 "movq %2, %%r11\n\t"23 "movq %2, %%r12\n\t"24 "movq %2, %%r13\n\t"25 "movq %2, %%r14\n\t"26 "movq %2, %%r15\n\t"27 "\n\t"28 "movaps %2, %%xmm8\n\t"29 "movaps %2, %%xmm9\n\t"30 "movaps %2, %%xmm10\n\t"31 "movaps %2, %%xmm11\n\t"32 "movaps %2, %%xmm12\n\t"33 "movaps %2, %%xmm13\n\t"34 "movaps %2, %%xmm14\n\t"35 "movaps %2, %%xmm15\n\t"36 "\n\t"37 "int3\n\t"38 "\n\t"39 "movq %%r8, 0x00(%0)\n\t"40 "movq %%r9, 0x08(%0)\n\t"41 "movq %%r10, 0x10(%0)\n\t"42 "movq %%r11, 0x18(%0)\n\t"43 "movq %%r12, 0x20(%0)\n\t"44 "movq %%r13, 0x28(%0)\n\t"45 "movq %%r14, 0x30(%0)\n\t"46 "movq %%r15, 0x38(%0)\n\t"47 "\n\t"48 "movaps %%xmm8, 0x00(%1)\n\t"49 "movaps %%xmm9, 0x10(%1)\n\t"50 "movaps %%xmm10, 0x20(%1)\n\t"51 "movaps %%xmm11, 0x30(%1)\n\t"52 "movaps %%xmm12, 0x40(%1)\n\t"53 "movaps %%xmm13, 0x50(%1)\n\t"54 "movaps %%xmm14, 0x60(%1)\n\t"55 "movaps %%xmm15, 0x70(%1)\n\t"56 :57 : "a"(r64), "b"(xmm), "m"(xmm_fill)58 : "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%xmm8",59 "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15"60 );61 62 for (int i = 0; i < 8; ++i)63 printf("r%d = 0x%016" PRIx64 "\n", i+8, r64[i]);64 for (int i = 0; i < 8; ++i) {65 printf("xmm%d = { ", i+8);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