зеркало из https://github.com/mozilla/gecko-dev.git
117 строки
3.4 KiB
C
117 строки
3.4 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/*******************************************************************************
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S P O R T M O D E L
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_____
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____/_____\____
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/__o____o____o__\ __
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\_______________/ (@@)/
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/\_____|_____/\ x~[]~
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~~~~~~~~~~~/~~~~~~~|~~~~~~~\~~~~~~~~/\~~~~~~~~~
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Advanced Technology Garbage Collector
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Copyright (c) 1997 Netscape Communications, Inc. All rights reserved.
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Recovered by: Warren Harris
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*******************************************************************************/
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#include "sm.h"
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#include "smgen.h"
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#include <stdio.h>
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#include <time.h>
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#define ITERATIONS (10*1024*1024)
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#define SIZE 1024
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int divTable[SIZE];
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int
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main(void)
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{
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int i, j;
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clock_t t1, t2, te;
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int ans1[SIZE], ans2[SIZE];
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fprintf(stdout, "SportModel: Division algorithm timing analysis test\n");
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t1 = clock();
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for (i = 0, j = 0; i < ITERATIONS; i++) {
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ans1[SIZE - 1 - j] = j;
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if (++j == SIZE) j = 0;
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}
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t2 = clock();
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te = t2 - t1;
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fprintf(stdout, "empty loop = %ldms\n", te * 1000 / CLOCKS_PER_SEC);
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t1 = clock();
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i = ITERATIONS;
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SM_UNROLLED_WHILE(i, {
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ans1[SIZE - 1 - j] = j;
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if (++j == SIZE) j = 0;
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});
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t2 = clock();
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fprintf(stdout, "unrolled loop = %ldms\n", (t2 - t1) * 1000 / CLOCKS_PER_SEC);
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t1 = clock();
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for (i = 0, j = 0; i < ITERATIONS; i++) {
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ans1[SIZE - 1 - j] = j / 12;
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if (++j == SIZE) j = 0;
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}
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t2 = clock();
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fprintf(stdout, "div loop = %ldms\n", (t2 - t1 - te) * 1000 / CLOCKS_PER_SEC);
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/* initialize divTable */
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for (j = 0; j < SIZE; j++) {
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divTable[j] = j / 12;
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}
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t1 = clock();
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for (i = 0, j = 0; i < ITERATIONS; i++) {
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ans1[SIZE - 1 - j] = divTable[j];
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if (++j == SIZE) j = 0;
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}
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t2 = clock();
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fprintf(stdout, "lookup loop = %ldms\n", (t2 - t1 - te) * 1000 / CLOCKS_PER_SEC);
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t1 = clock();
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for (i = 0, j = 0; i < ITERATIONS; i++) {
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ans2[SIZE - 1 - j] = ((j + 1) * 21845) >> 18;
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if (++j == SIZE) j = 0;
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}
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t2 = clock();
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fprintf(stdout, "rad loop = %ldms\n", (t2 - t1 - te) * 1000 / CLOCKS_PER_SEC);
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#if 0
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for (i = 0; i < SIZE; i++) {
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fprintf(stdout, "%8d %8d %8d (%8d) %8d %8d\n",
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i, ans1[i], ans2[i], (ans1[i] - ans2[i]), divTable[i],
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SM_DIV(i, SM_FIRST_MIDSIZE_BUCKET));
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}
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#endif
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}
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/******************************************************************************/
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