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#include <stdio.h>
#include <stdlib.h>
#include "tests/asm.h"
#include "tests/malloc.h"
#include <string.h>
const unsigned int vec0[4]
= { 0x12345678, 0x11223344, 0x55667788, 0x87654321 };
const unsigned int vec1[4]
= { 0xABCDEF01, 0xAABBCCDD, 0xEEFF0011, 0x10FEDCBA };
const unsigned int vecZ[4]
= { 0, 0, 0, 0 };
void do_fxsave ( void* p ) {
asm __volatile__("fxsave (%0)" : : "r" (p) : "memory" );
}
void do_fxrstor ( void* p ) {
asm __volatile__("fxrstor (%0)" : : "r" (p) : "memory" );
}
void do_zeroise ( void )
{
asm __volatile__("finit");
asm __volatile__(
"fldz\n\t"
"fldz\n\t"
"fldz\n\t"
"fldz\n\t"
"fldz\n\t"
"fldz\n\t"
"fldz\n\t"
"fldz\n\t"
"finit\n");
asm __volatile__("movups " VG_SYM(vecZ) ", %xmm0");
asm __volatile__("movups " VG_SYM(vecZ) ", %xmm1");
asm __volatile__("movups " VG_SYM(vecZ) ", %xmm2");
asm __volatile__("movups " VG_SYM(vecZ) ", %xmm3");
asm __volatile__("movups " VG_SYM(vecZ) ", %xmm4");
asm __volatile__("movups " VG_SYM(vecZ) ", %xmm5");
asm __volatile__("movups " VG_SYM(vecZ) ", %xmm6");
asm __volatile__("movups " VG_SYM(vecZ) ", %xmm7");
asm __volatile__(
"pushl $0\n\t"
"ldmxcsr 0(%esp)\n\t"
"addl $4,%esp\n");
}
/* set up the FP and SSE state, and then dump it. */
void do_setup_then_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__("movups " VG_SYM(vec0) ", %xmm0");
asm __volatile__("movups " VG_SYM(vec1) ", %xmm1");
asm __volatile__("xorps %xmm2, %xmm2");
asm __volatile__("movaps %xmm2, %xmm3");
asm __volatile__("movaps %xmm2, %xmm4");
asm __volatile__("movaps %xmm2, %xmm5");
asm __volatile__("movaps %xmm2, %xmm6");
asm __volatile__("movaps %xmm1, %xmm7");
asm __volatile__("xorps %xmm0, %xmm7");
do_fxsave (p);
}
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;
}
void show ( unsigned char* buf, int xx )
{
int i;
for (i = 0; i < 512; i++) {
if ((i % 16) == 0)
printf("%3d ", i);
if (xx && isFPLsbs(i))
printf("xx ");
else
printf("%02x ", buf[i]);
if (i > 0 && ((i % 16) == 15))
printf("\n");
}
}
int main ( int argc, char** argv )
{
unsigned char* buf1 = memalign16(512);
unsigned char* buf2 = memalign16(512);
unsigned char* buf3 = memalign16(512);
int xx = argc > 1;
printf("Re-run with any arg to suppress least-significant\n"
" 16 bits of FP numbers\n");
memset(buf1, 0x55, 512);
memset(buf2, 0x55, 512);
memset(buf3, 0x55, 512);
/* Load up x87/xmm state and dump it. */
do_setup_then_fxsave(buf1);
printf("\nBEFORE\n");
show(buf1, xx);
/* Zeroise x87/xmm state and dump it, to show that the
regs have been cleared out. */
do_zeroise();
do_fxsave(buf2);
printf("\nZEROED\n");
show(buf2, xx);
/* Reload x87/xmm state from buf1 and dump it in buf3. */
do_fxrstor(buf1);
do_fxsave(buf3);
printf("\nRESTORED\n");
show(buf3, xx);
free(buf1); free(buf2); free(buf3);
return 0;
}
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