summaryrefslogtreecommitdiffstats
path: root/libtommath/etc/tune.c
diff options
context:
space:
mode:
Diffstat (limited to 'libtommath/etc/tune.c')
-rw-r--r--libtommath/etc/tune.c145
1 files changed, 0 insertions, 145 deletions
diff --git a/libtommath/etc/tune.c b/libtommath/etc/tune.c
deleted file mode 100644
index c2ac998..0000000
--- a/libtommath/etc/tune.c
+++ /dev/null
@@ -1,145 +0,0 @@
-/* Tune the Karatsuba parameters
- *
- * Tom St Denis, tomstdenis@gmail.com
- */
-#include <tommath.h>
-#include <time.h>
-
-/* how many times todo each size mult. Depends on your computer. For slow computers
- * this can be low like 5 or 10. For fast [re: Athlon] should be 25 - 50 or so
- */
-#define TIMES (1UL<<14UL)
-
-#ifndef X86_TIMER
-
-/* RDTSC from Scott Duplichan */
-static ulong64 TIMFUNC (void)
- {
- #if defined __GNUC__
- #if defined(__i386__) || defined(__x86_64__)
- /* version from http://www.mcs.anl.gov/~kazutomo/rdtsc.html
- * the old code always got a warning issued by gcc, clang did not complain...
- */
- unsigned hi, lo;
- __asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
- return ((ulong64)lo)|( ((ulong64)hi)<<32);
- #else /* gcc-IA64 version */
- unsigned long result;
- __asm__ __volatile__("mov %0=ar.itc" : "=r"(result) :: "memory");
- while (__builtin_expect ((int) result == -1, 0))
- __asm__ __volatile__("mov %0=ar.itc" : "=r"(result) :: "memory");
- return result;
- #endif
-
- // Microsoft and Intel Windows compilers
- #elif defined _M_IX86
- __asm rdtsc
- #elif defined _M_AMD64
- return __rdtsc ();
- #elif defined _M_IA64
- #if defined __INTEL_COMPILER
- #include <ia64intrin.h>
- #endif
- return __getReg (3116);
- #else
- #error need rdtsc function for this build
- #endif
- }
-
-
-/* generic ISO C timer */
-ulong64 LBL_T;
-void t_start(void) { LBL_T = TIMFUNC(); }
-ulong64 t_read(void) { return TIMFUNC() - LBL_T; }
-
-#else
-extern void t_start(void);
-extern ulong64 t_read(void);
-#endif
-
-ulong64 time_mult(int size, int s)
-{
- unsigned long x;
- mp_int a, b, c;
- ulong64 t1;
-
- mp_init (&a);
- mp_init (&b);
- mp_init (&c);
-
- mp_rand (&a, size);
- mp_rand (&b, size);
-
- if (s == 1) {
- KARATSUBA_MUL_CUTOFF = size;
- } else {
- KARATSUBA_MUL_CUTOFF = 100000;
- }
-
- t_start();
- for (x = 0; x < TIMES; x++) {
- mp_mul(&a,&b,&c);
- }
- t1 = t_read();
- mp_clear (&a);
- mp_clear (&b);
- mp_clear (&c);
- return t1;
-}
-
-ulong64 time_sqr(int size, int s)
-{
- unsigned long x;
- mp_int a, b;
- ulong64 t1;
-
- mp_init (&a);
- mp_init (&b);
-
- mp_rand (&a, size);
-
- if (s == 1) {
- KARATSUBA_SQR_CUTOFF = size;
- } else {
- KARATSUBA_SQR_CUTOFF = 100000;
- }
-
- t_start();
- for (x = 0; x < TIMES; x++) {
- mp_sqr(&a,&b);
- }
- t1 = t_read();
- mp_clear (&a);
- mp_clear (&b);
- return t1;
-}
-
-int
-main (void)
-{
- ulong64 t1, t2;
- int x, y;
-
- for (x = 8; ; x += 2) {
- t1 = time_mult(x, 0);
- t2 = time_mult(x, 1);
- printf("%d: %9llu %9llu, %9llu\n", x, t1, t2, t2 - t1);
- if (t2 < t1) break;
- }
- y = x;
-
- for (x = 8; ; x += 2) {
- t1 = time_sqr(x, 0);
- t2 = time_sqr(x, 1);
- printf("%d: %9llu %9llu, %9llu\n", x, t1, t2, t2 - t1);
- if (t2 < t1) break;
- }
- printf("KARATSUBA_MUL_CUTOFF = %d\n", y);
- printf("KARATSUBA_SQR_CUTOFF = %d\n", x);
-
- return 0;
-}
-
-/* $Source$ */
-/* $Revision$ */
-/* $Date$ */