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| author | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:08 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:08 +0100 |
| commit | cdd927d98cc38acf55e1c6594b5c9451df8f239f (patch) | |
| tree | 442bb8c8fa5eb23ade648bbc99db0614cbfe56b3 /ChangeLog | |
| parent | 2ee1bc57ab50737ee2ab88c4d796b90e08b4bf93 (diff) | |
| download | glibc-cdd927d98cc38acf55e1c6594b5c9451df8f239f.zip glibc-cdd927d98cc38acf55e1c6594b5c9451df8f239f.tar.gz glibc-cdd927d98cc38acf55e1c6594b5c9451df8f239f.tar.bz2 | |
S390: Add z13 memmove ifunc variant.
This patch introduces a z13 specific ifunc variant for memmove.
As the common code implementation, it checks if we can copy from
the beginning to the end - with z196 memcpy implementation - or
if we have to copy from the end to the beginning.
The latter case is done by using vector load/store instructions.
If vector instructions are not available, the common-code is
used as fallback. Therefore it is implemented in memmove-c with
a different name.
Furthermore the ifunc logic decides if we need the common-code
implementation at all. If vector instructions are supported
due to the minimum architecture level set we can skip the
common-code ifunc variant.
ChangeLog:
* sysdeps/s390/Makefile (sysdep_routines): Add memmove-c.
* sysdeps/s390/ifunc-memcpy.h (HAVE_MEMMOVE_IFUNC,
HAVE_MEMMOVE_IFUNC_AND_VX_SUPPORT, MEMMOVE_DEFAULT,
HAVE_MEMMOVE_C, MEMMOVE_C, HAVE_MEMMOVE_Z13, MEMMOVE_Z13):
New defines.
* sysdeps/s390/memcpy-z900.S: Add z13 memmove implementation.
* sysdeps/s390/memmove-c.c: New file.
* sysdeps/s390/memmove.c: Likewise.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add ifunc variants for memmove.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 13 |
1 files changed, 13 insertions, 0 deletions
@@ -1,5 +1,18 @@ 2018-12-18 Stefan Liebler <stli@linux.ibm.com> + * sysdeps/s390/Makefile (sysdep_routines): Add memmove-c. + * sysdeps/s390/ifunc-memcpy.h (HAVE_MEMMOVE_IFUNC, + HAVE_MEMMOVE_IFUNC_AND_VX_SUPPORT, MEMMOVE_DEFAULT, + HAVE_MEMMOVE_C, MEMMOVE_C, HAVE_MEMMOVE_Z13, MEMMOVE_Z13): + New defines. + * sysdeps/s390/memcpy-z900.S: Add z13 memmove implementation. + * sysdeps/s390/memmove-c.c: New file. + * sysdeps/s390/memmove.c: Likewise. + * sysdeps/s390/multiarch/ifunc-impl-list.c + (__libc_ifunc_impl_list): Add ifunc variants for memmove. + +2018-12-18 Stefan Liebler <stli@linux.ibm.com> + * config.h.in (HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT): New undefine. * sysdeps/s390/configure.ac: Add check for z13 support. * sysdeps/s390/configure: Regenerated. |