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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-10-06 12:59:32 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-11-06 17:37:57 -0200
commita1a638dda91ed7739a066477908511e53840603b (patch)
treee97e3e6fbc929d8e5926f4731104b4a1ed18918b /ChangeLog
parent802c1f1645d626c1297246d62f5586734686a128 (diff)
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arm: Implement memchr ifunc selection in C
This patch refactor ARM memchr ifunc selector to a C implementation.
No functional change is expected, including ifunc resolution rules.

It also reorganize the ifunc options code:

  1. The memchr_impl.S is renamed to memchr_neon.S and multiple
     compilation options (which route to armv6t2/memchr one) is
     removed.  The code to build if __ARM_NEON__ is defined is
     also simplified.

  2. A memchr_noneon is added (which as build along previous ifunc
     resolution) and includes the armv6t2 direct.

  3. Same as 2. for loader object.

Alongside the aforementioned changes, it also some cleanus:

  - Internal memchr definition (__GI_memcpy) is now a hidden
    symbol.
  - No need to create hidden definition for the ifunc variants.

Checked on armv7-linux-gnueabihf and with a build for arm-linux-gnueabi,
arm-linux-gnueabihf with and without multiarch support and with both
GCC 7.1 and GCC mainline.

	* sysdeps/arm/armv7/multiarch/Makefile [$(subdir) = string]
	(sysdeps_routines): Add memchr_noneon.
	* sysdeps/arm/armv7/multiarch/ifunc-memchr.h: New file.
	* sysdeps/arm/armv7/multiarch/memchr_noneon.S: Likewise.
	* sysdeps/arm/armv7/multiarch/rtld-memchr.S: Likewise.
	* sysdeps/arm/armv7/multiarch/memchr.S: Remove file.
	* sysdeps/arm/armv7/multiarch/memchr.c: New file.
	* sysdeps/arm/armv7/multiarch/memchr_impl.S: Move to ...
	* sysdeps/arm/armv7/multiarch/memchr_neon.S: ... here.

Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'ChangeLog')
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diff --git a/ChangeLog b/ChangeLog
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+++ b/ChangeLog
@@ -1,5 +1,15 @@
 2017-11-06  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
+	* sysdeps/arm/armv7/multiarch/Makefile [$(subdir) = string]
+	(sysdeps_routines): Add memchr_noneon.
+	* sysdeps/arm/armv7/multiarch/ifunc-memchr.h: New file.
+	* sysdeps/arm/armv7/multiarch/memchr_noneon.S: Likewise.
+	* sysdeps/arm/armv7/multiarch/rtld-memchr.S: Likewise.
+	* sysdeps/arm/armv7/multiarch/memchr.S: Remove file.
+	* sysdeps/arm/armv7/multiarch/memchr.c: New file.
+	* sysdeps/arm/armv7/multiarch/memchr_impl.S: Move to ...
+	* sysdeps/arm/armv7/multiarch/memchr_neon.S: ... here.
+
 	* sysdeps/arm/arm-ifunc.h: New file.
 	* sysdeps/arm/armv7/multiarch/ifunc-memcpy.h: Likewise.
 	* sysdeps/arm/armv7/multiarch/memcpy.c: Likewise.