diff options
Diffstat (limited to 'libtommath/etc/tune.c')
| -rw-r--r-- | libtommath/etc/tune.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/libtommath/etc/tune.c b/libtommath/etc/tune.c index acb146f..c2ac998 100644 --- a/libtommath/etc/tune.c +++ b/libtommath/etc/tune.c @@ -6,18 +6,23 @@ #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 + * 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__) - unsigned long long a; - __asm__ __volatile__ ("rdtsc\nmovl %%eax,%0\nmovl %%edx,4+%0\n"::"m"(a):"%eax","%edx"); - return a; + /* 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"); @@ -42,8 +47,6 @@ static ulong64 TIMFUNC (void) } -#ifndef X86_TIMER - /* generic ISO C timer */ ulong64 LBL_T; void t_start(void) { LBL_T = TIMFUNC(); } @@ -67,7 +70,7 @@ ulong64 time_mult(int size, int s) mp_rand (&a, size); mp_rand (&b, size); - if (s == 1) { + if (s == 1) { KARATSUBA_MUL_CUTOFF = size; } else { KARATSUBA_MUL_CUTOFF = 100000; @@ -95,7 +98,7 @@ ulong64 time_sqr(int size, int s) mp_rand (&a, size); - if (s == 1) { + if (s == 1) { KARATSUBA_SQR_CUTOFF = size; } else { KARATSUBA_SQR_CUTOFF = 100000; @@ -117,7 +120,7 @@ main (void) ulong64 t1, t2; int x, y; - for (x = 8; ; x += 2) { + 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); @@ -125,7 +128,7 @@ main (void) } y = x; - for (x = 8; ; x += 2) { + 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); @@ -136,3 +139,7 @@ main (void) return 0; } + +/* $Source$ */ +/* $Revision$ */ +/* $Date$ */ |