* Roger Riggs:
> to support addExact(), subtractExact(), negateExact(), multiplyExact(),
> and toIntExact() for int and long primitive types.
Would it make sense to replace (x ^ r) < 0 && (x ^ y) >= 0
in
+ public static int addExact(int x, int y) {
+ int r = x + y;
+ if ((x ^ r) < 0 && (x ^ y) >= 0) {
+ throw new ArithmeticException("Addition overflows an int");
+ }
+ return r;
+ }
with (x ^ y ^ r) < 0?
For substraction, you could use ((x ^ r) & (x ^ y)) < 0.
Will Hotspot be able to optimize away the string construction on the
exception path in multiplyExact() if the exception is caught locally?
--
Florian Weimer <fwei...@bfk.de>
BFK edv-consulting GmbH http://www.bfk.de/
Kriegsstraße 100 tel: +49-721-96201-1
D-76133 Karlsruhe fax: +49-721-96201-99
