http://d.puremagic.com/issues/show_bug.cgi?id=3735



--- Comment #4 from Stewart Gordon <s...@iname.com> 2012-01-18 16:31:48 PST ---
(In reply to comment #2)
> Apart from Stewart's comment, there's also the case of >>>.
> 
> a >>>= b is different to a = a >>> b, if a is short or byte.
> 
> (The first does an unsigned shift, the second does a signed shift).

Oh yes, that crazy abomination that is promotion.  Suppose you have

byte a = cast(byte) 0b11110000;  // why does it insist on a cast?
a = a >>> 3;

then what actually happens is

0b11110000 >> 3
promote to int
0b1111111111110000 >> 3
apply shift
0b0001111111111110
convert back to a byte
0b11111110

If you shift by 25 or more (17 or more for short), you'll start to see the zero
bits come through.

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