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#include <libunwind.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <altivec.h>
#include <sys/resource.h>
#define panic(args...) { fprintf (stderr, args); abort(); }
extern vector signed int vec_init ();
extern void vec_print (vector signed int v);
vector signed int vec_stack (int count);
int
main ()
{
printf ("&vec_stack = %016lx\n", (unsigned long) vec_stack);
vec_stack (3);
return 0;
}
vector signed int
vec_stack (int count)
{
register vector signed int v1;
register vector signed int v2;
register vector signed int v3;
register vector signed int v4;
register vector signed int v5;
register vector signed int v6;
register vector signed int v7;
register vector signed int v8;
register vector signed int v9;
unw_fpreg_t vr;
unw_cursor_t cursor;
unw_word_t ip, sp;
unw_context_t uc;
int ret;
int verbose = 1;
/* if (count == 0) return vec_init(); */
if (count == 0)
{
unw_getcontext (&uc);
if (unw_init_local (&cursor, &uc) < 0)
{
panic ("unw_init_local failed!\n");
}
else
{
do
{
if ((ret = unw_get_reg (&cursor, UNW_REG_IP, &ip)) < 0)
{
panic ("FAILURE: unw_get_reg returned %d for UNW_REG_IP\n",
ret);
}
if ((ret = unw_get_reg (&cursor, UNW_REG_SP, &sp)) < 0)
{
panic ("FAILURE: unw_get_reg returned %d for UNW_REG_SP\n",
ret);
}
if ((ret = unw_get_fpreg (&cursor, UNW_PPC64_V30, &vr)) < 0)
{
panic
("FAILURE: unw_get_vreg returned %d for UNW_PPC64_V30\n",
ret);
}
if (verbose)
{
const char *regname = unw_regname (UNW_PPC64_V30);
char proc_name_buffer[256];
unw_word_t offset;
unsigned int * vec_half1, * vec_half2;
vec_half1 = (unsigned int *)&vr;
vec_half2 = vec_half1 + 1;
printf ("ip = %016lx, sp=%016lx\n", (long) ip, (long) sp);
printf ("vr30 = %08x %08x %08x %08x\n",
(unsigned int) (*vec_half1 >> 16),
(unsigned int) (*vec_half1 & 0xffffffff),
(unsigned int) (*vec_half2 >> 16),
(unsigned int) (*vec_half2 & 0xffffffff));
ret =
unw_get_proc_name (&cursor, proc_name_buffer,
sizeof (proc_name_buffer), &offset);
if (ret == 0)
{
printf ("proc name = %s, offset = %lx\n",
proc_name_buffer, offset);
}
else
{
panic ("unw_get_proc_name returned %d\n", ret);
}
printf ("unw_regname(UNW_PPC_V30) = %s\n\n", regname);
}
ret = unw_step (&cursor);
if (ret < 0)
{
unw_get_reg (&cursor, UNW_REG_IP, &ip);
panic ("FAILURE: unw_step() returned %d for ip=%lx\n", ret,
(long) ip);
}
}
while (ret > 0);
}
}
v1 = vec_init ();
v2 = vec_init ();
v3 = vec_init ();
v4 = vec_init ();
v5 = vec_init ();
v6 = vec_init ();
/* make use of all of the registers in some calculation */
v7 =
vec_nor (v1, vec_add (v2, vec_sub (v3, vec_and (v4, vec_or (v5, v6)))));
/*
* "force" the registers to be non-volatile by making a call and also
* using the registers after the call.
*/
v8 = vec_stack (count - 1);
/*
* Use the result from the previous call, plus all of the non-volatile
* registers in another calculation.
*/
v9 =
vec_nor (v1,
vec_add (v2,
vec_sub (v3,
vec_and (v4, vec_or (v5, vec_xor (v6, v8))))));
printf ("v1 - ");
vec_print (v1);
printf ("\n");
printf ("v2 - ");
vec_print (v2);
printf ("\n");
printf ("v3 - ");
vec_print (v3);
printf ("\n");
printf ("v4 - ");
vec_print (v4);
printf ("\n");
printf ("v5 - ");
vec_print (v5);
printf ("\n");
printf ("v6 - ");
vec_print (v6);
printf ("\n");
printf ("v7 - ");
vec_print (v7);
printf ("\n");
printf ("v8 - ");
vec_print (v8);
printf ("\n");
printf ("v9 - ");
vec_print (v9);
printf ("\n");
return v9;
}
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