The Tor Browser / file comparison
comparison: build/pgo/js-input/bitops-3bit-bits-in-byte.html
build/pgo/js-input/bitops-3bit-bits-in-byte.html
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:d7c8a18bac9c |
|---|---|
| 1 <!DOCTYPE html> | |
| 2 <head> | |
| 3 <!-- | |
| 4 Copyright (C) 2007 Apple Inc. All rights reserved. | |
| 5 | |
| 6 Redistribution and use in source and binary forms, with or without | |
| 7 modification, are permitted provided that the following conditions | |
| 8 are met: | |
| 9 1. Redistributions of source code must retain the above copyright | |
| 10 notice, this list of conditions and the following disclaimer. | |
| 11 2. Redistributions in binary form must reproduce the above copyright | |
| 12 notice, this list of conditions and the following disclaimer in the | |
| 13 documentation and/or other materials provided with the distribution. | |
| 14 | |
| 15 THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 16 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 18 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 19 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 23 OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 25 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 --> | |
| 27 | |
| 28 <title>SunSpider bitops-3bit-bits-in-byte</title> | |
| 29 | |
| 30 </head> | |
| 31 | |
| 32 <body> | |
| 33 <h3>bitops-3bit-bits-in-byte</h3> | |
| 34 <div id="console"> | |
| 35 </div> | |
| 36 | |
| 37 <script> | |
| 38 | |
| 39 var _sunSpiderStartDate = new Date(); | |
| 40 | |
| 41 // Copyright (c) 2004 by Arthur Langereis (arthur_ext at domain xfinitegames, tld com | |
| 42 | |
| 43 // 1 op = 6 ANDs, 3 SHRs, 3 SHLs, 4 assigns, 2 ADDs | |
| 44 // O(1) | |
| 45 function fast3bitlookup(b) { | |
| 46 var c, bi3b = 0xE994; // 0b1110 1001 1001 0100; // 3 2 2 1 2 1 1 0 | |
| 47 c = 3 & (bi3b >> ((b << 1) & 14)); | |
| 48 c += 3 & (bi3b >> ((b >> 2) & 14)); | |
| 49 c += 3 & (bi3b >> ((b >> 5) & 6)); | |
| 50 return c; | |
| 51 | |
| 52 /* | |
| 53 lir4,0xE994; 9 instructions, no memory access, minimal register dependence, 6 shifts, 2 adds, 1 inline assign | |
| 54 rlwinmr5,r3,1,28,30 | |
| 55 rlwinmr6,r3,30,28,30 | |
| 56 rlwinmr7,r3,27,29,30 | |
| 57 rlwnmr8,r4,r5,30,31 | |
| 58 rlwnmr9,r4,r6,30,31 | |
| 59 rlwnmr10,r4,r7,30,31 | |
| 60 addr3,r8,r9 | |
| 61 addr3,r3,r10 | |
| 62 */ | |
| 63 } | |
| 64 | |
| 65 | |
| 66 function TimeFunc(func) { | |
| 67 var x, y, t; | |
| 68 for(var x=0; x<500; x++) | |
| 69 for(var y=0; y<256; y++) func(y); | |
| 70 } | |
| 71 | |
| 72 TimeFunc(fast3bitlookup); | |
| 73 | |
| 74 | |
| 75 var _sunSpiderInterval = new Date() - _sunSpiderStartDate; | |
| 76 | |
| 77 document.getElementById("console").innerHTML = _sunSpiderInterval; | |
| 78 </script> | |
| 79 | |
| 80 | |
| 81 </body> | |
| 82 </html> |
