mirror of https://github.com/python/cpython.git
138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2008-2020 Stefan Krah. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
|
|
#include "mpdecimal.h"
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
|
|
|
|
static void
|
|
err_exit(const char *msg)
|
|
{
|
|
fprintf(stderr, "%s\n", msg);
|
|
exit(1);
|
|
}
|
|
|
|
static mpd_t *
|
|
new_mpd(void)
|
|
{
|
|
mpd_t *x = mpd_qnew();
|
|
if (x == NULL) {
|
|
err_exit("out of memory");
|
|
}
|
|
|
|
return x;
|
|
}
|
|
|
|
/* Nonsense version of escape-time algorithm for calculating a mandelbrot
|
|
* set. Just for benchmarking. */
|
|
static void
|
|
color_point(mpd_t *x0, mpd_t *y0, long maxiter, mpd_context_t *ctx)
|
|
{
|
|
mpd_t *x, *y, *sq_x, *sq_y;
|
|
mpd_t *two;
|
|
|
|
x = new_mpd();
|
|
y = new_mpd();
|
|
mpd_set_u32(x, 0, ctx);
|
|
mpd_set_u32(y, 0, ctx);
|
|
|
|
sq_x = new_mpd();
|
|
sq_y = new_mpd();
|
|
mpd_set_u32(sq_x, 0, ctx);
|
|
mpd_set_u32(sq_y, 0, ctx);
|
|
|
|
two = new_mpd();
|
|
mpd_set_u32(two, 2, ctx);
|
|
|
|
for (long i = 0; i < maxiter; i++) {
|
|
mpd_mul(y, x, y, ctx);
|
|
mpd_mul(y, y, two, ctx);
|
|
mpd_add(y, y, y0, ctx);
|
|
|
|
mpd_sub(x, sq_x, sq_y, ctx);
|
|
mpd_add(x, x, x0, ctx);
|
|
|
|
mpd_mul(sq_x, x, x, ctx);
|
|
mpd_mul(sq_y, y, y, ctx);
|
|
}
|
|
|
|
mpd_copy(x0, x, ctx);
|
|
|
|
mpd_del(two);
|
|
mpd_del(sq_y);
|
|
mpd_del(sq_x);
|
|
mpd_del(y);
|
|
mpd_del(x);
|
|
}
|
|
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
mpd_context_t ctx;
|
|
mpd_t *x0, *y0;
|
|
uint32_t prec = 19;
|
|
long iter = 10000000;
|
|
clock_t start_clock, end_clock;
|
|
|
|
if (argc != 3) {
|
|
err_exit("usage: bench prec iter\n");
|
|
}
|
|
prec = strtoul(argv[1], NULL, 10);
|
|
iter = strtol(argv[2], NULL, 10);
|
|
|
|
mpd_init(&ctx, prec);
|
|
/* no more MPD_MINALLOC changes after here */
|
|
|
|
x0 = new_mpd();
|
|
y0 = new_mpd();
|
|
mpd_set_string(x0, "0.222", &ctx);
|
|
mpd_set_string(y0, "0.333", &ctx);
|
|
if (ctx.status & MPD_Errors) {
|
|
mpd_del(y0);
|
|
mpd_del(x0);
|
|
err_exit("unexpected error during conversion");
|
|
}
|
|
|
|
start_clock = clock();
|
|
color_point(x0, y0, iter, &ctx);
|
|
end_clock = clock();
|
|
|
|
mpd_print(x0);
|
|
fprintf(stderr, "time: %f\n\n", (double)(end_clock-start_clock)/(double)CLOCKS_PER_SEC);
|
|
|
|
mpd_del(y0);
|
|
mpd_del(x0);
|
|
|
|
return 0;
|
|
}
|