1 2 #include <stdio.h> 3 #include <stdlib.h> 4 5 const unsigned int vec0[4] 6 = { 0x12345678, 0x11223344, 0x55667788, 0x87654321 }; 7 8 const unsigned int vec1[4] 9 = { 0xABCDEF01, 0xAABBCCDD, 0xEEFF0011, 0x10FEDCBA }; 10 11 /* set up the FP and SSE state, and then dump it. */ 12 void do_fxsave ( void* p ) 13 { 14 asm __volatile__("finit"); 15 asm __volatile__("fldpi"); 16 asm __volatile__("fld1"); 17 asm __volatile__("fldln2"); 18 asm __volatile__("fldlg2"); 19 asm __volatile__("fld %st(3)"); 20 asm __volatile__("fld %st(3)"); 21 asm __volatile__("fld1"); 22 asm __volatile__("movups (%0), %%xmm0" : : "r"(&vec0[0]) : "xmm0" ); 23 asm __volatile__("movups (%0), %%xmm1" : : "r"(&vec1[0]) : "xmm1" ); 24 asm __volatile__("xorps %xmm2, %xmm2"); 25 asm __volatile__("movaps %xmm0, %xmm3"); 26 asm __volatile__("movaps %xmm1, %xmm4"); 27 asm __volatile__("movaps %xmm2, %xmm5"); 28 asm __volatile__("movaps %xmm0, %xmm6"); 29 asm __volatile__("movaps %xmm1, %xmm7"); 30 asm __volatile__("movaps %xmm1, %xmm8"); 31 asm __volatile__("movaps %xmm2, %xmm9"); 32 asm __volatile__("movaps %xmm0, %xmm10"); 33 asm __volatile__("movaps %xmm1, %xmm11"); 34 asm __volatile__("movaps %xmm1, %xmm12"); 35 asm __volatile__("movaps %xmm2, %xmm13"); 36 asm __volatile__("movaps %xmm0, %xmm14"); 37 asm __volatile__("movaps %xmm1, %xmm15"); 38 asm __volatile__("fxsave (%0)" : : "r" (p) : "memory" ); 39 } 40 41 int isFPLsbs ( int i ) 42 { 43 int q; 44 q = 32; if (i == q || i == q+1) return 1; 45 q = 48; if (i == q || i == q+1) return 1; 46 q = 64; if (i == q || i == q+1) return 1; 47 q = 80; if (i == q || i == q+1) return 1; 48 q = 96; if (i == q || i == q+1) return 1; 49 q = 112; if (i == q || i == q+1) return 1; 50 q = 128; if (i == q || i == q+1) return 1; 51 q = 144; if (i == q || i == q+1) return 1; 52 return 0; 53 } 54 55 int main ( int argc, char** argv ) 56 { 57 int i, j; 58 unsigned char* buf = malloc(512); 59 int xx = 1; /* argc > 1; 60 printf("Re-run with any arg to suppress least-significant\n" 61 " 16 bits of FP numbers\n"); 62 */ 63 for (i = 0; i < 512; i++) 64 buf[i] = 0x55; 65 66 do_fxsave(buf); 67 for (j = 0; j < 512; j++) { 68 i = (j & 0xFFF0) + (15 - (j & 0xF)); 69 if ((j % 16) == 0) 70 printf("%3d ", j); 71 if (xx && isFPLsbs(i)) 72 printf("xx "); 73 else 74 printf("%02x ", buf[i]); 75 if (j > 0 && ((j % 16) == 15)) 76 printf("\n"); 77 } 78 return 0; 79 } 80
