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#include <stdio.h>
#include "gmp.h"
#include "gmp-impl.h"
#ifndef USG
#include <sys/time.h>
#include <sys/resource.h>
unsigned long
cputime ()
{
struct rusage rus;
getrusage (0, &rus);
return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
}
#else
#include <time.h>
#ifndef CLOCKS_PER_SEC
#define CLOCKS_PER_SEC 1000000
#endif
#if CLOCKS_PER_SEC >= 10000
#define CLOCK_TO_MILLISEC(cl) ((cl) / (CLOCKS_PER_SEC / 1000))
#else
#define CLOCK_TO_MILLISEC(cl) ((cl) * 1000 / CLOCKS_PER_SEC)
#endif
unsigned long
cputime ()
{
return CLOCK_TO_MILLISEC (clock ());
}
#endif
#define M * 1000000
#ifndef CLOCK
#if defined (__m88k__)
#define CLOCK 20 M
#elif defined (__i386__)
#define CLOCK (16.666667 M)
#elif defined (__m68k__)
#define CLOCK (20 M)
#elif defined (_IBMR2)
#define CLOCK (25 M)
#elif defined (__sparc__)
#define CLOCK (20 M)
#elif defined (__sun__)
#define CLOCK (20 M)
#elif defined (__mips)
#define CLOCK (40 M)
#elif defined (__hppa__)
#define CLOCK (50 M)
#elif defined (__alpha)
#define CLOCK (133 M)
#else
#error "Don't know CLOCK of your machine"
#endif
#endif
#ifndef OPS
#define OPS 10000000
#endif
#ifndef SIZE
#define SIZE 328
#endif
#ifndef TIMES
#define TIMES OPS/SIZE
#else
#undef OPS
#define OPS (SIZE*TIMES)
#endif
mp_limb_t
#if __STDC__
refmpn_sub_n (mp_ptr res_ptr,
mp_srcptr s1_ptr, mp_srcptr s2_ptr, mp_size_t size)
#else
refmpn_sub_n (res_ptr, s1_ptr, s2_ptr, size)
register mp_ptr res_ptr;
register mp_srcptr s1_ptr;
register mp_srcptr s2_ptr;
mp_size_t size;
#endif
{
register mp_limb_t x, y, cy;
register mp_size_t j;
/* The loop counter and index J goes from -SIZE to -1. This way
the loop becomes faster. */
j = -size;
/* Offset the base pointers to compensate for the negative indices. */
s1_ptr -= j;
s2_ptr -= j;
res_ptr -= j;
cy = 0;
do
{
y = s2_ptr[j];
x = s1_ptr[j];
y += cy; /* add previous carry to subtrahend */
cy = (y < cy); /* get out carry from that addition */
y = x - y; /* main subtract */
cy = (y > x) + cy; /* get out carry from the subtract, combine */
res_ptr[j] = y;
}
while (++j != 0);
return cy;
}
main (argc, argv)
int argc;
char **argv;
{
mp_limb_t s1[SIZE];
mp_limb_t s2[SIZE];
mp_limb_t dx[SIZE+1];
mp_limb_t dy[SIZE+1];
int cyx, cyy;
int i;
long t0, t;
int test;
mp_size_t size;
for (test = 0; ; test++)
{
#ifdef RANDOM
size = (random () % SIZE + 1);
#else
size = SIZE;
#endif
mpn_random2 (s1, size);
mpn_random2 (s2, size);
dx[size] = 0x12345678;
dy[size] = 0x12345678;
#ifdef PRINT
mpn_print (s1, size);
mpn_print (s2, size);
#endif
t0 = cputime();
for (i = 0; i < TIMES; i++)
cyx = refmpn_sub_n (dx, s1, s2, size);
t = cputime() - t0;
#if TIMES != 1
printf ("refmpn_sub_n: %ldms (%.2f cycles/limb)\n",
t,
((double) t * CLOCK) / (OPS * 1000.0));
#endif
#ifdef PRINT
printf ("%d ", cyx); mpn_print (dx, size);
#endif
t0 = cputime();
for (i = 0; i < TIMES; i++)
cyx = mpn_sub_n (dx, s1, s2, size);
t = cputime() - t0;
#if TIMES != 1
printf ("mpn_sub_n: %ldms (%.2f cycles/limb)\n",
t,
((double) t * CLOCK) / (OPS * 1000.0));
#endif
#ifdef PRINT
printf ("%d ", cyx); mpn_print (dx, size);
#endif
#ifndef NOCHECK
/* Put garbage in the destination. */
for (i = 0; i < size; i++)
{
dx[i] = 0x7654321;
dy[i] = 0x1234567;
}
cyx = refmpn_sub_n (dx, s1, s2, size);
cyy = mpn_sub_n (dy, s1, s2, size);
if (cyx != cyy || mpn_cmp (dx, dy, size) != 0
|| dx[size] != 0x12345678 || dy[size] != 0x12345678)
{
#ifndef PRINT
printf ("%d ", cyx); mpn_print (dx, size);
printf ("%d ", cyy); mpn_print (dy, size);
#endif
abort();
}
#endif
}
}
mpn_print (mp_ptr p, mp_size_t size)
{
mp_size_t i;
for (i = size - 1; i >= 0; i--)
{
printf ("%0*lX", (int) (2 * sizeof(mp_limb_t)), p[i]);
#ifdef SPACE
if (i != 0)
printf (" ");
#endif
}
puts ("");
}
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