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