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Re: [patch] expmed.c: Speed up synth_mult.

From: Kazu Hirata <kazu at cs dot umass dot edu>
To: zack at codesourcery dot com
Cc: gcc-patches at gcc dot gnu dot org
Date: Wed, 17 Nov 2004 17:24:10 -0500 (EST)
Subject: Re: [patch] expmed.c: Speed up synth_mult.
References: <20041117.170944.23007390.kazu@cs.umass.edu><876544m848.fsf@codesourcery.com>

Hi Zack,

> > 	* expmed.c (alg_code): Add alg_unknown.
> > 	(alg_hash_entry): New.
> > 	(NUM_ALG_HASH_ENTRIES): Likewise.
> > 	(alg_hash): Likewise.
> > 	(synth_mult): Cache the result into alg_hash.
> 
> This is OK.

Thanks!

> How much tuning of the cache size did you do?

None. :-) I would say it's difficult because it really depends on the
source code that you are compiling.  One of these days, I might plot
the number of calls to synth_mult over different cache size.

Kazu Hirata

References:
- [patch] expmed.c: Speed up synth_mult.
  - From: Kazu Hirata
- Re: [patch] expmed.c: Speed up synth_mult.
  - From: Zack Weinberg

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