1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/build/pgo/js-input/bitops-3bit-bits-in-byte.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,82 @@
1.4 +<!DOCTYPE html>
1.5 +<head>
1.6 +<!--
1.7 + Copyright (C) 2007 Apple Inc. All rights reserved.
1.8 +
1.9 + Redistribution and use in source and binary forms, with or without
1.10 + modification, are permitted provided that the following conditions
1.11 + are met:
1.12 + 1. Redistributions of source code must retain the above copyright
1.13 + notice, this list of conditions and the following disclaimer.
1.14 + 2. Redistributions in binary form must reproduce the above copyright
1.15 + notice, this list of conditions and the following disclaimer in the
1.16 + documentation and/or other materials provided with the distribution.
1.17 +
1.18 + THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
1.19 + EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.20 + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.21 + PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
1.22 + CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.23 + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.24 + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.25 + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
1.26 + OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.27 + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
1.28 + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.29 +-->
1.30 +
1.31 +<title>SunSpider bitops-3bit-bits-in-byte</title>
1.32 +
1.33 +</head>
1.34 +
1.35 +<body>
1.36 +<h3>bitops-3bit-bits-in-byte</h3>
1.37 +<div id="console">
1.38 +</div>
1.39 +
1.40 +<script>
1.41 +
1.42 +var _sunSpiderStartDate = new Date();
1.43 +
1.44 +// Copyright (c) 2004 by Arthur Langereis (arthur_ext at domain xfinitegames, tld com
1.45 +
1.46 +// 1 op = 6 ANDs, 3 SHRs, 3 SHLs, 4 assigns, 2 ADDs
1.47 +// O(1)
1.48 +function fast3bitlookup(b) {
1.49 +var c, bi3b = 0xE994; // 0b1110 1001 1001 0100; // 3 2 2 1 2 1 1 0
1.50 +c = 3 & (bi3b >> ((b << 1) & 14));
1.51 +c += 3 & (bi3b >> ((b >> 2) & 14));
1.52 +c += 3 & (bi3b >> ((b >> 5) & 6));
1.53 +return c;
1.54 +
1.55 +/*
1.56 +lir4,0xE994; 9 instructions, no memory access, minimal register dependence, 6 shifts, 2 adds, 1 inline assign
1.57 +rlwinmr5,r3,1,28,30
1.58 +rlwinmr6,r3,30,28,30
1.59 +rlwinmr7,r3,27,29,30
1.60 +rlwnmr8,r4,r5,30,31
1.61 +rlwnmr9,r4,r6,30,31
1.62 +rlwnmr10,r4,r7,30,31
1.63 +addr3,r8,r9
1.64 +addr3,r3,r10
1.65 +*/
1.66 +}
1.67 +
1.68 +
1.69 +function TimeFunc(func) {
1.70 +var x, y, t;
1.71 +for(var x=0; x<500; x++)
1.72 +for(var y=0; y<256; y++) func(y);
1.73 +}
1.74 +
1.75 +TimeFunc(fast3bitlookup);
1.76 +
1.77 +
1.78 +var _sunSpiderInterval = new Date() - _sunSpiderStartDate;
1.79 +
1.80 +document.getElementById("console").innerHTML = _sunSpiderInterval;
1.81 +</script>
1.82 +
1.83 +
1.84 +</body>
1.85 +</html>
