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Re: [PATCH] Optimized generic expf and exp2f

From: Joseph Myers <joseph at codesourcery dot com>
To: Szabolcs Nagy <szabolcs dot nagy at arm dot com>
Cc: <nd at arm dot com>, GNU C Library <libc-alpha at sourceware dot org>
Date: Mon, 11 Sep 2017 18:05:12 +0000
Subject: Re: [PATCH] Optimized generic expf and exp2f
Authentication-results: sourceware.org; auth=none
References: <59AED6DA.6000509@arm.com> <alpine.DEB.2.20.1709052014180.6352@digraph.polyomino.org.uk> <59B6C71B.2040708@arm.com>

On Mon, 11 Sep 2017, Szabolcs Nagy wrote:

> it is not yet clear to me how to do the errno-only-wrapper,
> since the existing wrapper-template machinery does not
> work on a per function basis, but that code would be nice
> to reuse, some guidance on that would be helpful.

I'd expect something like

#include <math-type-macros-float.h>
#undef __USE_WRAPPER_TEMPLATE
#define __USE_WRAPPER_TEMPLATE 1
#include <w_exp_template.c>

should work.  (Modulo possibly needing to do something extra to give expf 
the right symbol version.)  A sysdeps w_expf.c should always override the 
default automatic generation based on the template.

-- 
Joseph S. Myers
joseph@codesourcery.com

References:
- [PATCH] Optimized generic expf and exp2f
  - From: Szabolcs Nagy
- Re: [PATCH] Optimized generic expf and exp2f
  - From: Joseph Myers
- Re: [PATCH] Optimized generic expf and exp2f
  - From: Szabolcs Nagy

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