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Diffstat (limited to 'build/pgo/js-input/sunspider/bitops-3bit-bits-in-byte.html')
| -rw-r--r-- | build/pgo/js-input/sunspider/bitops-3bit-bits-in-byte.html | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/build/pgo/js-input/sunspider/bitops-3bit-bits-in-byte.html b/build/pgo/js-input/sunspider/bitops-3bit-bits-in-byte.html new file mode 100644 index 0000000000..c40be94ef0 --- /dev/null +++ b/build/pgo/js-input/sunspider/bitops-3bit-bits-in-byte.html @@ -0,0 +1,82 @@ +<!DOCTYPE html> +<head> +<!-- + Copyright (C) 2007 Apple Inc. All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY + EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR + CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +--> + +<title>SunSpider bitops-3bit-bits-in-byte</title> + +</head> + +<body> +<h3>bitops-3bit-bits-in-byte</h3> +<div id="console"> +</div> + +<script> + +var _sunSpiderStartDate = new Date(); + +// Copyright (c) 2004 by Arthur Langereis (arthur_ext at domain xfinitegames, tld com + +// 1 op = 6 ANDs, 3 SHRs, 3 SHLs, 4 assigns, 2 ADDs +// O(1) +function fast3bitlookup(b) { +var c, bi3b = 0xE994; // 0b1110 1001 1001 0100; // 3 2 2 1 2 1 1 0 +c = 3 & (bi3b >> ((b << 1) & 14)); +c += 3 & (bi3b >> ((b >> 2) & 14)); +c += 3 & (bi3b >> ((b >> 5) & 6)); +return c; + +/* +lir4,0xE994; 9 instructions, no memory access, minimal register dependence, 6 shifts, 2 adds, 1 inline assign +rlwinmr5,r3,1,28,30 +rlwinmr6,r3,30,28,30 +rlwinmr7,r3,27,29,30 +rlwnmr8,r4,r5,30,31 +rlwnmr9,r4,r6,30,31 +rlwnmr10,r4,r7,30,31 +addr3,r8,r9 +addr3,r3,r10 +*/ +} + + +function TimeFunc(func) { +var x, y, t; +for(var x=0; x<500; x++) +for(var y=0; y<256; y++) func(y); +} + +TimeFunc(fast3bitlookup); + + +var _sunSpiderInterval = new Date() - _sunSpiderStartDate; + +document.getElementById("console").innerHTML = _sunSpiderInterval; +</script> + + +</body> +</html> |