diff options
Diffstat (limited to 'contrib/libgmp/mpn/tests/sub_n.c')
| -rw-r--r-- | contrib/libgmp/mpn/tests/sub_n.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/contrib/libgmp/mpn/tests/sub_n.c b/contrib/libgmp/mpn/tests/sub_n.c new file mode 100644 index 0000000..2b9031b --- /dev/null +++ b/contrib/libgmp/mpn/tests/sub_n.c @@ -0,0 +1,211 @@ +#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 (""); +} |
