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Re: Widening vs PPro
- To: law at cygnus dot com
- Subject: Re: Widening vs PPro
- From: Richard Henderson <rth at cygnus dot com>
- Date: Wed, 14 Apr 1999 00:16:16 -0700
- Cc: Jan Hubicka <hubicka at atrey dot karlin dot mff dot cuni dot cz>, egcs-patches at egcs dot cygnus dot com
- References: <12736.924071179@upchuck>
On Wed, Apr 14, 1999 at 12:26:19AM -0600, Jeffrey A Law wrote:
> The more I think about it, the more I suspect that defining PROMOTE_MODE
> to force widening of all non-memory integer operations is probably the
> best way to deal with partial registers stalls for the x86 variants where
> it is an issue.
>
> It's probably worth an experiment for ...
You'd think, but it didn't seem to be the case in practice. Even
when I only promoted HImode operations.
Some more extensive benchmarking is certainly in order, but...
r~