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RE: [Patch,AVR]: PR49687 (better widening 32-bit mul)
- From: "Weddington, Eric" <Eric dot Weddington at atmel dot com>
- To: "Georg-Johann Lay" <avr at gjlay dot de>, <gcc-patches at gcc dot gnu dot org>
- Cc: "Anatoly Sokolov" <aesok at post dot ru>, "Denis Chertykov" <chertykov at gmail dot com>, "Richard Henderson" <rth at redhat dot com>
- Date: Mon, 25 Jul 2011 08:19:46 -0600
- Subject: RE: [Patch,AVR]: PR49687 (better widening 32-bit mul)
- References: <4E2D3821.3090007@gjlay.de>
> -----Original Message-----
> From: Georg-Johann Lay [mailto:avr@gjlay.de]
> Sent: Monday, July 25, 2011 3:32 AM
> To: gcc-patches@gcc.gnu.org
> Cc: Anatoly Sokolov; Denis Chertykov; Weddington, Eric; Richard Henderson
> Subject: [Patch,AVR]: PR49687 (better widening 32-bit mul)
>
> Eric, can you review the assembler routines and say if such reuse is ok
> or if you'd prefer a speed-optimized version of __mulsi3 like in the
> current libgcc?
Hi Johann,
Typically a penalty on speed is preferred over a penalty on code size. Do you already have information on how it compares on code size with the old routines?
Eric