| Index: chrome/test/data/dromaeo/tests/sunspider-bitops-3bit-bits-in-byte.html
|
| ===================================================================
|
| --- chrome/test/data/dromaeo/tests/sunspider-bitops-3bit-bits-in-byte.html (revision 0)
|
| +++ chrome/test/data/dromaeo/tests/sunspider-bitops-3bit-bits-in-byte.html (revision 0)
|
| @@ -0,0 +1,46 @@
|
| +<html>
|
| +<head>
|
| +<script src="../htmlrunner.js"></script>
|
| +<script>
|
| +// 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<250; x++)
|
| +for(var y=0; y<256; y++) func(y);
|
| +}
|
| +
|
| +window.onload = function(){ startTest("sunspider-bitops-3bit-bits-in-byte", '');
|
| +
|
| +test("3bit bits in byte", function(){
|
| + TimeFunc(fast3bitlookup);
|
| +});
|
| +
|
| +endTest(); };
|
| +</script>
|
| +</head>
|
| +<body></body>
|
| +</html>
|
|
|
Chromium Code Reviews
Issue 269054:
Importing dromaeo performance tests to src/chrome/test/data.... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/