Re: Feature request concerning bitwise operations

2010-01-11 Thread Steven Bosscher
On Mon, Jan 11, 2010 at 8:14 AM, Wen Li wrote: > On x86 processors, I think bitwise operators should be optimized for > individual bit accesses, which should be converted to BT instructions. > > For example: > > x |= 1< x ^= 1< x &= ~(1< if (x&(1< > Especially when y is not known at compile time,

Feature request concerning bitwise operations

2010-01-10 Thread Wen Li
On x86 processors, I think bitwise operators should be optimized for individual bit accesses, which should be converted to BT instructions. For example: x |= 1<