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Re: [PATCH, ARM] Check for 64 FP instructions availability in libm before using them

From: Corinna Vinschen <vinschen at redhat dot com>
To: newlib at sourceware dot org
Date: Wed, 9 Dec 2015 10:31:43 +0100
Subject: Re: [PATCH, ARM] Check for 64 FP instructions availability in libm before using them
Authentication-results: sourceware.org; auth=none
References: <000201d1322d$d3b3d430$7b1b7c90$ at arm dot com>
Reply-to: newlib at sourceware dot org

On Dec  9 11:00, Thomas Preud'homme wrote:
> Currently, double precision math functions in newlib/libm/machine/arm detect whether neon instructions can be used for double precision computation by checking the architecture version (>= 8) and the availability of floating-point instructions. However, these instructions would not be available if targeting fpv5-sp-d16 as the FPU, which by definition does not have 64bit float instructions. This patch adds a check that __ARM_FP advertises 64bit float instructions.

Patch applied.


Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer
Red Hat

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References:
- [PATCH, ARM] Check for 64 FP instructions availability in libm before using them
  - From: Thomas Preud'homme

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