From cdd927d98cc38acf55e1c6594b5c9451df8f239f Mon Sep 17 00:00:00 2001 From: Stefan Liebler Date: Tue, 18 Dec 2018 13:57:08 +0100 Subject: 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. --- ChangeLog | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'ChangeLog') diff --git a/ChangeLog b/ChangeLog index 52dbc37..539e653 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,18 @@ 2018-12-18 Stefan Liebler + * 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 + * 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. -- cgit v1.1