1 #include <cinttypes> 2 #include <cstdint> 3 #include <cstdio> 4 5 union alignas(16) xmm_t { 6 uint64_t as_uint64[2]; 7 uint8_t as_uint8[16]; 8 }; 9 10 int main() { 11 constexpr xmm_t xmm_fill = { 12 .as_uint64 = { 0x0F0F0F0F0F0F0F0F, 0x0F0F0F0F0F0F0F0F } 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