On 5/21/06, Thomas Dickey <[EMAIL PROTECTED]> wrote:
On Sun, May 21, 2006 at 09:20:17AM +0200, Albert Cahalan wrote: > That is indeed a serious error.no - it's a stupid but benign error: source and destination addresses are the same
Consider this entirely reasonable implementation for PowerPC: if 32-byte aligned, do fast copy else if 8-byte aligned do double copy else if 4-byte aligned do float copy else do byte copy Then, for each 32-byte cache line, the "fast copy" code does: 1. prefetch the source cache line 2. allocate the destination cache line as all zeroes 3. fetch the source cache line 4. store the destination cache line End result: it acts like bzero() when src==dst
