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Re: [Patch,AVR]: PR49687 (better widening 32-bit mul)

From: Georg-Johann Lay <avr at gjlay dot de>
To: "Weddington, Eric" <Eric dot Weddington at atmel dot com>
Cc: gcc-patches at gcc dot gnu dot org, Denis Chertykov <chertykov at gmail dot com>, Richard Henderson <rth at redhat dot com>
Date: Tue, 26 Jul 2011 11:56:37 +0200
Subject: Re: [Patch,AVR]: PR49687 (better widening 32-bit mul)
References: <4E2D3821.3090007@gjlay.de> <8D64F155F1C88743BFDC71288E8E2DA8032C1E5F@csomb01.corp.atmel.com> <4E2D99CF.3050004@gjlay.de> <8D64F155F1C88743BFDC71288E8E2DA8032C2159@csomb01.corp.atmel.com> <4E2DDFA8.4090009@gjlay.de>

Georg-Johann Lay wrote:

> I found that too painful, and on devices with >= 8k flash the
> self-tail-call will just save 4 bytes.

That' not correct: even on devices >= 8k an rcall will always reach
the destination, so that the self tail-call always saves 6 bytes.

Johann

References:
- [Patch,AVR]: PR49687 (better widening 32-bit mul)
  - From: Georg-Johann Lay
- RE: [Patch,AVR]: PR49687 (better widening 32-bit mul)
  - From: Weddington, Eric
- Re: [Patch,AVR]: PR49687 (better widening 32-bit mul)
  - From: Georg-Johann Lay
- RE: [Patch,AVR]: PR49687 (better widening 32-bit mul)
  - From: Weddington, Eric
- Re: [Patch,AVR]: PR49687 (better widening 32-bit mul)
  - From: Georg-Johann Lay

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