Annotation of OpenXM_contrib/gmp/tests/devel/sub_n.c, Revision 1.1
1.1 ! ohara 1: /*
! 2: Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation,
! 3: Inc.
! 4:
! 5: This file is part of the GNU MP Library.
! 6:
! 7: The GNU MP Library is free software; you can redistribute it and/or modify
! 8: it under the terms of the GNU Lesser General Public License as published by
! 9: the Free Software Foundation; either version 2.1 of the License, or (at your
! 10: option) any later version.
! 11:
! 12: The GNU MP Library is distributed in the hope that it will be useful, but
! 13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 14: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
! 15: License for more details.
! 16:
! 17: You should have received a copy of the GNU Lesser General Public License
! 18: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! 19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! 20: MA 02111-1307, USA.
! 21: */
! 22:
! 23: #include <stdio.h>
! 24: #include "gmp.h"
! 25: #include "gmp-impl.h"
! 26:
! 27: #if defined (USG) || defined (__SVR4) || defined (_UNICOS) || defined (__hpux)
! 28: #include <time.h>
! 29:
! 30: int
! 31: cputime ()
! 32: {
! 33: if (CLOCKS_PER_SEC < 100000)
! 34: return clock () * 1000 / CLOCKS_PER_SEC;
! 35: return clock () / (CLOCKS_PER_SEC / 1000);
! 36: }
! 37: #else
! 38: #include <sys/types.h>
! 39: #include <sys/time.h>
! 40: #include <sys/resource.h>
! 41:
! 42: int
! 43: cputime ()
! 44: {
! 45: struct rusage rus;
! 46:
! 47: getrusage (0, &rus);
! 48: return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
! 49: }
! 50: #endif
! 51:
! 52: #define M * 1000000
! 53:
! 54: #ifndef CLOCK
! 55: #error "Don't know CLOCK of your machine"
! 56: #endif
! 57:
! 58: #ifndef OPS
! 59: #define OPS (CLOCK/5)
! 60: #endif
! 61: #ifndef SIZE
! 62: #define SIZE 328
! 63: #endif
! 64: #ifndef TIMES
! 65: #define TIMES OPS/SIZE
! 66: #else
! 67: #undef OPS
! 68: #define OPS (SIZE*TIMES)
! 69: #endif
! 70:
! 71:
! 72: mp_limb_t
! 73: refmpn_sub_n (mp_ptr res_ptr,
! 74: mp_srcptr s1_ptr, mp_srcptr s2_ptr, mp_size_t size)
! 75: {
! 76: register mp_limb_t x, y, cy;
! 77: register mp_size_t j;
! 78:
! 79: /* The loop counter and index J goes from -SIZE to -1. This way
! 80: the loop becomes faster. */
! 81: j = -size;
! 82:
! 83: /* Offset the base pointers to compensate for the negative indices. */
! 84: s1_ptr -= j;
! 85: s2_ptr -= j;
! 86: res_ptr -= j;
! 87:
! 88: cy = 0;
! 89: do
! 90: {
! 91: y = s2_ptr[j];
! 92: x = s1_ptr[j];
! 93: y = (y + cy) & GMP_NUMB_MASK; /* add previous carry to subtrahend */
! 94: cy = (y < cy); /* get out carry from that addition */
! 95: y = (x - y) & GMP_NUMB_MASK; /* main subtract */
! 96: cy = (y > x) + cy; /* get out carry from the subtract, combine */
! 97: res_ptr[j] = y;
! 98: }
! 99: while (++j != 0);
! 100:
! 101: return cy;
! 102: }
! 103:
! 104: main (argc, argv)
! 105: int argc;
! 106: char **argv;
! 107: {
! 108: mp_limb_t s1[SIZE];
! 109: mp_limb_t s2[SIZE];
! 110: mp_limb_t dx[SIZE+2];
! 111: mp_limb_t dy[SIZE+2];
! 112: int cyx, cyy;
! 113: int i;
! 114: long t0, t;
! 115: unsigned int test;
! 116: mp_size_t size;
! 117: unsigned int ntests;
! 118:
! 119: ntests = ~(unsigned) 0;
! 120: if (argc == 2)
! 121: ntests = strtol (argv[1], 0, 0);
! 122:
! 123: for (test = 1; test <= ntests; test++)
! 124: {
! 125: #if TIMES == 1 && ! defined (PRINT)
! 126: if (test % (SIZE > 10000 ? 1 : 10000 / SIZE) == 0)
! 127: {
! 128: printf ("\r%d", test);
! 129: fflush (stdout);
! 130: }
! 131: #endif
! 132:
! 133: #ifdef RANDOM
! 134: size = random () % SIZE + 1;
! 135: #else
! 136: size = SIZE;
! 137: #endif
! 138:
! 139: dx[0] = 0x87654321;
! 140: dy[0] = 0x87654321;
! 141: dx[size+1] = 0x12345678;
! 142: dy[size+1] = 0x12345678;
! 143:
! 144: #if TIMES != 1
! 145: mpn_random (s1, size);
! 146: mpn_random (s2, size);
! 147:
! 148: #ifndef NOCHECK
! 149: t0 = cputime();
! 150: for (i = 0; i < TIMES; i++)
! 151: refmpn_sub_n (dx+1, s1, s2, size);
! 152: t = cputime() - t0;
! 153: printf ("refmpn_sub_n: %5ldms (%.2f cycles/limb)\n",
! 154: t, ((double) t * CLOCK) / (OPS * 1000.0));
! 155: #endif
! 156:
! 157: t0 = cputime();
! 158: for (i = 0; i < TIMES; i++)
! 159: mpn_sub_n (dx+1, s1, s2, size);
! 160: t = cputime() - t0;
! 161: printf ("mpn_sub_n: %5ldms (%.2f cycles/limb)\n",
! 162: t, ((double) t * CLOCK) / (OPS * 1000.0));
! 163: #endif
! 164:
! 165: #ifndef NOCHECK
! 166: mpn_random2 (s1, size);
! 167: mpn_random2 (s2, size);
! 168:
! 169: #ifdef PRINT
! 170: mpn_print (s1, size);
! 171: mpn_print (s2, size);
! 172: #endif
! 173:
! 174: /* Put garbage in the destination. */
! 175: for (i = 0; i < size; i++)
! 176: {
! 177: dx[i+1] = 0xdead;
! 178: dy[i+1] = 0xbeef;
! 179: }
! 180:
! 181: cyx = refmpn_sub_n (dx+1, s1, s2, size);
! 182: cyy = mpn_sub_n (dy+1, s1, s2, size);
! 183: #ifdef PRINT
! 184: printf ("%d ", cyx); mpn_print (dx+1, size);
! 185: printf ("%d ", cyy); mpn_print (dy+1, size);
! 186: #endif
! 187: if (cyx != cyy || mpn_cmp (dx, dy, size+2) != 0
! 188: || dx[0] != 0x87654321 || dx[size+1] != 0x12345678)
! 189: {
! 190: #ifndef PRINT
! 191: printf ("%d ", cyx); mpn_print (dx+1, size);
! 192: printf ("%d ", cyy); mpn_print (dy+1, size);
! 193: #endif
! 194: printf ("\n");
! 195: if (dy[0] != 0x87654321)
! 196: printf ("clobbered at low end\n");
! 197: if (dy[size+1] != 0x12345678)
! 198: printf ("clobbered at high end\n");
! 199: printf ("TEST NUMBER %u\n", test);
! 200: abort();
! 201: }
! 202: #endif
! 203: }
! 204: }
! 205:
! 206: mpn_print (mp_ptr p, mp_size_t size)
! 207: {
! 208: mp_size_t i;
! 209:
! 210: for (i = size - 1; i >= 0; i--)
! 211: {
! 212: #ifdef _LONG_LONG_LIMB
! 213: printf ("%0*lX%0*lX", (int) (sizeof(mp_limb_t)),
! 214: (unsigned long) (p[i] >> (BITS_PER_MP_LIMB/2)),
! 215: (int) (sizeof(mp_limb_t)), (unsigned long) (p[i]));
! 216: #else
! 217: printf ("%0*lX", (int) (2 * sizeof(mp_limb_t)), p[i]);
! 218: #endif
! 219: #ifdef SPACE
! 220: if (i != 0)
! 221: printf (" ");
! 222: #endif
! 223: }
! 224: puts ("");
! 225: }
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