Re: More bit shifting issues
- From: CBFalconer <cbfalconer@xxxxxxxxx>
- Date: Tue, 01 Apr 2008 16:58:56 -0500
Boltar wrote:
I seem to be having yet more wierd issue with bit shifting. It
seems the following code doesnt do anything under gcc (ie it
returns -1 as both results). Anyone know why? Is it another
language definition or CPU issue?
main() {
printf("%d\n",(int)0xFFFFFFFF >> 1);
printf("%d\n",(int)-1 >> 1);
}
I suspect this covers it:
6.5 Expressions
.... snip ...
[#4] Some operators (the unary operator ~, and the binary
operators <<, >>, &, ^, and |, collectively described as
bitwise operators) are required to have operands that have
integer type. These operators return values that depend on
the internal representations of integers, and have
implementation-defined and undefined aspects for signed
types.
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[page]: <http://cbfalconer.home.att.net>
Try the download section.
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