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Re: [PATCH 1/3] sparc: build with -mvis on sparc32/sparcv9 and sparc64

From: Mike Frysinger <vapier at gentoo dot org>
To: Aurelien Jarno <aurelien at aurel32 dot net>
Cc: libc-alpha at sourceware dot org, David Miller <davem at davemloft dot net>
Date: Thu, 4 Aug 2016 07:29:46 -0400
Subject: Re: [PATCH 1/3] sparc: build with -mvis on sparc32/sparcv9 and sparc64
Authentication-results: sourceware.org; auth=none
References: <1470272940-22128-1-git-send-email-aurelien@aurel32.net>

On 04 Aug 2016 03:08, Aurelien Jarno wrote:
> When building for sparc32/sparcv9 or sparc64, we assume that VIS
> instructions are available and use them in the sparc specific assembly
> code. However we do not tell GCC to use such instructions, resulting in
> slightly suboptimal code.
> 
> Fix that by passing -Wa,-Av9a -mvis to GCC.

does this address:
	https://sourceware.org/bugzilla/show_bug.cgi?id=19477

it also seems to imply that v9 is *not* supported, and if you want to
build for sparc64, you must have at least v9a ?  and that VIS is always
supported ?  glancing at some wiki history, it doesn't seem like a big
problem, but it is different from before.
-mike

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References:
- [PATCH 1/3] sparc: build with -mvis on sparc32/sparcv9 and sparc64
  - From: Aurelien Jarno

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