On 2017/01/13 05:17PM, David Laight wrote: > From: Naveen N. Rao > > Sent: 13 January 2017 17:10 > > Generate instructions to perform the endian conversion using registers, > > rather than generating two memory accesses. > > > > The "way easier and faster" comment was obviously for the author, not > > the processor. > > That rather depends on whether the processor has a store to load forwarder > that will satisfy the read from the store buffer. > I don't know about ppc, but at least some x86 will do that.
Interesting - good to know that. However, I don't think powerpc does that and in-register swap is likely faster regardless. Note also that gcc prefers this form at higher optimization levels. Thanks, Naveen
