22 Jul
2016
22 Jul
'16
5:51 p.m.
On Jul 22, 2016, at 8:10 PM, Cameron Kaiser
<spectre at floodgap.com> wrote:
I realize I'm a broken record here, but PowerPC does the same thing.
It seems that a great many things that some modern reporter thinks are new, or recent, and
unusual, have been done in any number of places. And possibly (as in this case) at least
20 years earlier than the reporter is aware of.
paul
It's
not. Peter is talking about a four-bit field in the
instructions. You're talking about a six-bit field in the program
counter.
Something that's always bothered me about three-address architectures
like ARM is why there is the insistence on that scheduling bottleneck,
the condition code register? You can see how two-address architectures
like the x80 and x86 try to get around the problem by having certain
instructions not modify certain condition code bits