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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-10-04 17:44:08 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-11-06 17:37:57 -0200 |
| commit | 802c1f1645d626c1297246d62f5586734686a128 (patch) | |
| tree | c0ef0545b4d9382385f2242d3f86ae9fbd1bcda6 /sysdeps/arm/armv7/multiarch/memcpy_vfp.S | |
| parent | abcb584d0eae7270b35e1b3fed1f9661e26b8be0 (diff) | |
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arm: Implement memcpy ifunc selection in C
This patch refactor ARM memcpy ifunc selector to a C implementation.
No functional change is expected, including ifunc resolution rules.
It also adds some cleanup:
- Internal memcpy hidden 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. I also checked with the some possible
multiarch different configurations that trigger different memcpy
buids (__ARM_NEON__ && !__SOFT_FP__, !__ARM_NEON__ && !__SOFT_FP__, and
!__ARM_NEON__ && __SOFT_FP__).
* sysdeps/arm/arm-ifunc.h: New file.
* sysdeps/arm/armv7/multiarch/ifunc-memcpy.h: Likewise.
* sysdeps/arm/armv7/multiarch/memcpy.c: Likewise.
* sysdeps/arm/armv7/multiarch/memcpy_arm.S: Likewise.
* sysdeps/arm/armv7/multiarch/rtld-memcpy.S: Likewise.
* sysdeps/arm/armv7/multiarch/memcpy_neon.S [!__ARM_NEON__]
(__memcpy_neon): Avoid create hidden alias.
* sysdeps/arm/armv7/multiarch/memcpy_vfp.S [!__ARM_NEON_]
(__memcpy_vfp): Likewise.
* sysdeps/arm/armv7/multiarch/Makefile [$(subdir) = string]
(sysdep_routines): Add memcpy_arm.
* sysdeps/arm/armv7/multiarch/memcpy.S: Remove file.
Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/arm/armv7/multiarch/memcpy_vfp.S')
| -rw-r--r-- | sysdeps/arm/armv7/multiarch/memcpy_vfp.S | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sysdeps/arm/armv7/multiarch/memcpy_vfp.S b/sysdeps/arm/armv7/multiarch/memcpy_vfp.S index e008c041ed..d1e9ede439 100644 --- a/sysdeps/arm/armv7/multiarch/memcpy_vfp.S +++ b/sysdeps/arm/armv7/multiarch/memcpy_vfp.S @@ -1,7 +1,9 @@ -/* Under __ARM_NEON__, memcpy_neon.S defines memcpy directly +/* Under __ARM_NEON__ memcpy_neon.S defines memcpy directly and the __memcpy_vfp code will never be used. */ #ifndef __ARM_NEON__ # define MEMCPY_VFP # define memcpy __memcpy_vfp +# undef libc_hidden_builtin_def +# define libc_hidden_builtin_def(a) # include "memcpy_impl.S" #endif |