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