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.

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

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