js/src/devtools/jint/sunspider/math-cordic.js@129ffea94266
js/src/devtools/jint/sunspider/math-cordic.js
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /*
2 * Copyright (C) Rich Moore. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
26 /////. Start CORDIC
28 var AG_CONST = 0.6072529350;
30 function FIXED(X)
31 {
32 return X * 65536.0;
33 }
35 function FLOAT(X)
36 {
37 return X / 65536.0;
38 }
40 function DEG2RAD(X)
41 {
42 return 0.017453 * (X);
43 }
45 var Angles = [
46 FIXED(45.0), FIXED(26.565), FIXED(14.0362), FIXED(7.12502),
47 FIXED(3.57633), FIXED(1.78991), FIXED(0.895174), FIXED(0.447614),
48 FIXED(0.223811), FIXED(0.111906), FIXED(0.055953),
49 FIXED(0.027977)
50 ];
53 function cordicsincos() {
54 var X;
55 var Y;
56 var TargetAngle;
57 var CurrAngle;
58 var Step;
60 X = FIXED(AG_CONST); /* AG_CONST * cos(0) */
61 Y = 0; /* AG_CONST * sin(0) */
63 TargetAngle = FIXED(28.027);
64 CurrAngle = 0;
65 /* BEGIN LOOP */
66 for (Step = 0; Step < 12; Step++) {
67 var NewX;
68 if (TargetAngle > CurrAngle) {
69 NewX = X - (Y >> Step);
70 Y = (X >> Step) + Y;
71 X = NewX;
72 CurrAngle += Angles[Step];
73 } else {
74 NewX = X + (Y >> Step);
75 Y = -(X >> Step) + Y;
76 X = NewX;
77 CurrAngle -= Angles[Step];
78 }
79 }
80 /* END LOOP */
81 }
83 ///// End CORDIC
85 function cordic( runs ) {
86 var start = new Date();
88 /* BEGIN LOOP */
89 for ( var i = 0 ; i < runs ; i++ ) {
90 cordicsincos();
91 }
92 /* END LOOP */
94 var end = new Date();
96 return end.getTime() - start.getTime();
97 }
99 cordic(25000);
