js/src/devtools/jint/sunspider/bitops-bits-in-byte.js@6474c204b198 (annotated)
js/src/devtools/jint/sunspider/bitops-bits-in-byte.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Copyright (c) 2004 by Arthur Langereis (arthur_ext at domain xfinitegames, tld com) |
| michael@0 | 2 | |
| michael@0 | 3 | |
| michael@0 | 4 | // 1 op = 2 assigns, 16 compare/branches, 8 ANDs, (0-8) ADDs, 8 SHLs |
| michael@0 | 5 | // O(n) |
| michael@0 | 6 | function bitsinbyte(b) { |
| michael@0 | 7 | var m = 1, c = 0; |
| michael@0 | 8 | /* BEGIN LOOP */ |
| michael@0 | 9 | while(m<0x100) { |
| michael@0 | 10 | if(b & m) c++; |
| michael@0 | 11 | m <<= 1; |
| michael@0 | 12 | } |
| michael@0 | 13 | /* END LOOP */ |
| michael@0 | 14 | return c; |
| michael@0 | 15 | } |
| michael@0 | 16 | |
| michael@0 | 17 | function TimeFunc(func) { |
| michael@0 | 18 | var x, y, t; |
| michael@0 | 19 | /* BEGIN LOOP */ |
| michael@0 | 20 | for(var x=0; x<350; x++) { |
| michael@0 | 21 | /* BEGIN LOOP */ |
| michael@0 | 22 | for(var y=0; y<256; y++) func(y); |
| michael@0 | 23 | /* END LOOP */ |
| michael@0 | 24 | } |
| michael@0 | 25 | /* END LOOP */ |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | TimeFunc(bitsinbyte); |
