js/src/jit-test/tests/ion/bug889451.js@6474c204b198 (annotated)
js/src/jit-test/tests/ion/bug889451.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 | /* |
| michael@0 | 2 | js> (((-1 >>> 1) + 1) * Math.pow(2, 52 - 30) + 1) & 1 |
| michael@0 | 3 | 0 |
| michael@0 | 4 | js> (((-1 >> 1) + 1) * Math.pow(2, 52 - 30) + 1) & 1 |
| michael@0 | 5 | 1 |
| michael@0 | 6 | */ |
| michael@0 | 7 | |
| michael@0 | 8 | function f(x) { |
| michael@0 | 9 | if (x >= 0) { |
| michael@0 | 10 | // if it does not fail, try with lower power of 2. |
| michael@0 | 11 | return (((x >>> 1) + 1) * 4194304 /* 2 ** (52 - 30) */ + 1) & 1; |
| michael@0 | 12 | } |
| michael@0 | 13 | return 2; |
| michael@0 | 14 | } |
| michael@0 | 15 | |
| michael@0 | 16 | assertEq(f(-1 >>> 1), 1); |
| michael@0 | 17 | assertEq(f(-1 >>> 0), 0); |
| michael@0 | 18 | assertEq(f(-1 >>> 0), 0); |
