/* | |
js> (((-1 >>> 1) + 1) * Math.pow(2, 52 - 30) + 1) & 1 | |
0 | |
js> (((-1 >> 1) + 1) * Math.pow(2, 52 - 30) + 1) & 1 | |
1 | |
*/ | |
function f(x) { | |
if (x >= 0) { | |
// if it does not fail, try with lower power of 2. | |
return (((x >>> 1) + 1) * 4194304 /* 2 ** (52 - 30) */ + 1) & 1; | |
} | |
return 2; | |
} | |
assertEq(f(-1 >>> 1), 1); | |
assertEq(f(-1 >>> 0), 0); | |
assertEq(f(-1 >>> 0), 0); |