js/src/jit-test/tests/basic/testShiftRightLogical.js@6474c204b198 (annotated)
js/src/jit-test/tests/basic/testShiftRightLogical.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 | /* Test the proper operation of the logical right shift operator. This is |
| michael@0 | 2 | * especially important on ARM as an explicit mask is required at the native |
| michael@0 | 3 | * instruction level. */ |
| michael@0 | 4 | |
| michael@0 | 5 | load(libdir + 'range.js'); |
| michael@0 | 6 | |
| michael@0 | 7 | function testShiftRightLogical() |
| michael@0 | 8 | { |
| michael@0 | 9 | var r = []; |
| michael@0 | 10 | var i = 0; |
| michael@0 | 11 | var j = 0; |
| michael@0 | 12 | |
| michael@0 | 13 | var shifts = [0,1,7,8,15,16,23,24,31]; |
| michael@0 | 14 | |
| michael@0 | 15 | /* Samples from the simple shift range. */ |
| michael@0 | 16 | for (i = 0; i < shifts.length; i++) |
| michael@0 | 17 | r[j++] = -2147483648 >>> shifts[i]; |
| michael@0 | 18 | |
| michael@0 | 19 | /* Samples outside the normal shift range. */ |
| michael@0 | 20 | for (i = 0; i < shifts.length; i++) |
| michael@0 | 21 | r[j++] = -2147483648 >>> (shifts[i] + 32); |
| michael@0 | 22 | |
| michael@0 | 23 | /* Samples far outside the normal shift range. */ |
| michael@0 | 24 | for (i = 0; i < shifts.length; i++) |
| michael@0 | 25 | r[j++] = -2147483648 >>> (shifts[i] + 224); |
| michael@0 | 26 | for (i = 0; i < shifts.length; i++) |
| michael@0 | 27 | r[j++] = -2147483648 >>> (shifts[i] + 256); |
| michael@0 | 28 | |
| michael@0 | 29 | return r.join(","); |
| michael@0 | 30 | } |
| michael@0 | 31 | /* Note: Arguments to the ">>>" operator are converted to unsigned 32-bit |
| michael@0 | 32 | * integers during evaluation. As a result, -2147483648 >>> 0 evaluates to the |
| michael@0 | 33 | * unsigned interpretation of the same value, which is 2147483648. */ |
| michael@0 | 34 | assertEq(testShiftRightLogical(), |
| michael@0 | 35 | "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+ |
| michael@0 | 36 | "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+ |
| michael@0 | 37 | "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+ |
| michael@0 | 38 | "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1"); |
