build/pgo/js-input/bitops-3bit-bits-in-byte.html@129ffea94266
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.
1 <!DOCTYPE html>
2 <head>
3 <!--
4 Copyright (C) 2007 Apple Inc. All rights reserved.
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.
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 -->
28 <title>SunSpider bitops-3bit-bits-in-byte</title>
30 </head>
32 <body>
33 <h3>bitops-3bit-bits-in-byte</h3>
34 <div id="console">
35 </div>
37 <script>
39 var _sunSpiderStartDate = new Date();
41 // Copyright (c) 2004 by Arthur Langereis (arthur_ext at domain xfinitegames, tld com
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;
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 }
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 }
72 TimeFunc(fast3bitlookup);
75 var _sunSpiderInterval = new Date() - _sunSpiderStartDate;
77 document.getElementById("console").innerHTML = _sunSpiderInterval;
78 </script>
81 </body>
82 </html>
