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comparison: js/src/jit-test/tests/sunspider/check-math-cordic.js
js/src/jit-test/tests/sunspider/check-math-cordic.js
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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deleted
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| -1:000000000000 | 0:f3ae768068df |
|---|---|
| 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 */ | |
| 25 | |
| 26 /////. Start CORDIC | |
| 27 | |
| 28 var AG_CONST = 0.6072529350; | |
| 29 | |
| 30 function FIXED(X) | |
| 31 { | |
| 32 return X * 65536.0; | |
| 33 } | |
| 34 | |
| 35 function FLOAT(X) | |
| 36 { | |
| 37 return X / 65536.0; | |
| 38 } | |
| 39 | |
| 40 function DEG2RAD(X) | |
| 41 { | |
| 42 return 0.017453 * (X); | |
| 43 } | |
| 44 | |
| 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 ]; | |
| 51 | |
| 52 | |
| 53 function cordicsincos() { | |
| 54 var X; | |
| 55 var Y; | |
| 56 var TargetAngle; | |
| 57 var CurrAngle; | |
| 58 var Step; | |
| 59 | |
| 60 X = FIXED(AG_CONST); /* AG_CONST * cos(0) */ | |
| 61 Y = 0; /* AG_CONST * sin(0) */ | |
| 62 | |
| 63 TargetAngle = FIXED(28.027); | |
| 64 CurrAngle = 0; | |
| 65 for (Step = 0; Step < 12; Step++) { | |
| 66 var NewX; | |
| 67 if (TargetAngle > CurrAngle) { | |
| 68 NewX = X - (Y >> Step); | |
| 69 Y = (X >> Step) + Y; | |
| 70 X = NewX; | |
| 71 CurrAngle += Angles[Step]; | |
| 72 } else { | |
| 73 NewX = X + (Y >> Step); | |
| 74 Y = -(X >> Step) + Y; | |
| 75 X = NewX; | |
| 76 CurrAngle -= Angles[Step]; | |
| 77 } | |
| 78 } | |
| 79 return CurrAngle; | |
| 80 } | |
| 81 | |
| 82 ///// End CORDIC | |
| 83 | |
| 84 function cordic( runs ) { | |
| 85 var actual; | |
| 86 | |
| 87 for ( var i = 0 ; i < runs ; i++ ) { | |
| 88 actual = cordicsincos(); | |
| 89 } | |
| 90 | |
| 91 assertEq(actual, 1834995.3515519998) | |
| 92 } | |
| 93 | |
| 94 cordic(25000); |
