js/src/jit-test/tests/sunspider/check-math-cordic.js@6474c204b198 (annotated)
js/src/jit-test/tests/sunspider/check-math-cordic.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright (C) Rich Moore. All rights reserved. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Redistribution and use in source and binary forms, with or without |
| michael@0 | 5 | * modification, are permitted provided that the following conditions |
| michael@0 | 6 | * are met: |
| michael@0 | 7 | * 1. Redistributions of source code must retain the above copyright |
| michael@0 | 8 | * notice, this list of conditions and the following disclaimer. |
| michael@0 | 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| michael@0 | 10 | * notice, this list of conditions and the following disclaimer in the |
| michael@0 | 11 | * documentation and/or other materials provided with the distribution. |
| michael@0 | 12 | * |
| michael@0 | 13 | * THIS SOFTWARE IS PROVIDED BY CONTRIBUTORS ``AS IS'' AND ANY |
| michael@0 | 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| michael@0 | 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| michael@0 | 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| michael@0 | 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| michael@0 | 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| michael@0 | 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| michael@0 | 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| michael@0 | 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| michael@0 | 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| michael@0 | 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 24 | */ |
| michael@0 | 25 | |
| michael@0 | 26 | /////. Start CORDIC |
| michael@0 | 27 | |
| michael@0 | 28 | var AG_CONST = 0.6072529350; |
| michael@0 | 29 | |
| michael@0 | 30 | function FIXED(X) |
| michael@0 | 31 | { |
| michael@0 | 32 | return X * 65536.0; |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | function FLOAT(X) |
| michael@0 | 36 | { |
| michael@0 | 37 | return X / 65536.0; |
| michael@0 | 38 | } |
| michael@0 | 39 | |
| michael@0 | 40 | function DEG2RAD(X) |
| michael@0 | 41 | { |
| michael@0 | 42 | return 0.017453 * (X); |
| michael@0 | 43 | } |
| michael@0 | 44 | |
| michael@0 | 45 | var Angles = [ |
| michael@0 | 46 | FIXED(45.0), FIXED(26.565), FIXED(14.0362), FIXED(7.12502), |
| michael@0 | 47 | FIXED(3.57633), FIXED(1.78991), FIXED(0.895174), FIXED(0.447614), |
| michael@0 | 48 | FIXED(0.223811), FIXED(0.111906), FIXED(0.055953), |
| michael@0 | 49 | FIXED(0.027977) |
| michael@0 | 50 | ]; |
| michael@0 | 51 | |
| michael@0 | 52 | |
| michael@0 | 53 | function cordicsincos() { |
| michael@0 | 54 | var X; |
| michael@0 | 55 | var Y; |
| michael@0 | 56 | var TargetAngle; |
| michael@0 | 57 | var CurrAngle; |
| michael@0 | 58 | var Step; |
| michael@0 | 59 | |
| michael@0 | 60 | X = FIXED(AG_CONST); /* AG_CONST * cos(0) */ |
| michael@0 | 61 | Y = 0; /* AG_CONST * sin(0) */ |
| michael@0 | 62 | |
| michael@0 | 63 | TargetAngle = FIXED(28.027); |
| michael@0 | 64 | CurrAngle = 0; |
| michael@0 | 65 | for (Step = 0; Step < 12; Step++) { |
| michael@0 | 66 | var NewX; |
| michael@0 | 67 | if (TargetAngle > CurrAngle) { |
| michael@0 | 68 | NewX = X - (Y >> Step); |
| michael@0 | 69 | Y = (X >> Step) + Y; |
| michael@0 | 70 | X = NewX; |
| michael@0 | 71 | CurrAngle += Angles[Step]; |
| michael@0 | 72 | } else { |
| michael@0 | 73 | NewX = X + (Y >> Step); |
| michael@0 | 74 | Y = -(X >> Step) + Y; |
| michael@0 | 75 | X = NewX; |
| michael@0 | 76 | CurrAngle -= Angles[Step]; |
| michael@0 | 77 | } |
| michael@0 | 78 | } |
| michael@0 | 79 | return CurrAngle; |
| michael@0 | 80 | } |
| michael@0 | 81 | |
| michael@0 | 82 | ///// End CORDIC |
| michael@0 | 83 | |
| michael@0 | 84 | function cordic( runs ) { |
| michael@0 | 85 | var actual; |
| michael@0 | 86 | |
| michael@0 | 87 | for ( var i = 0 ; i < runs ; i++ ) { |
| michael@0 | 88 | actual = cordicsincos(); |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | assertEq(actual, 1834995.3515519998) |
| michael@0 | 92 | } |
| michael@0 | 93 | |
| michael@0 | 94 | cordic(25000); |
