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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 /sysdeps/s390/multiarch/ifunc-impl-list.c | |
| parent | 2ee1bc57ab50737ee2ab88c4d796b90e08b4bf93 (diff) | |
| download | glibc-cdd927d98cc38acf55e1c6594b5c9451df8f239f.tar.gz glibc-cdd927d98cc38acf55e1c6594b5c9451df8f239f.tar.xz glibc-cdd927d98cc38acf55e1c6594b5c9451df8f239f.zip | |
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 'sysdeps/s390/multiarch/ifunc-impl-list.c')
| -rw-r--r-- | sysdeps/s390/multiarch/ifunc-impl-list.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c index 6969c480cc..c05c63e006 100644 --- a/sysdeps/s390/multiarch/ifunc-impl-list.c +++ b/sysdeps/s390/multiarch/ifunc-impl-list.c @@ -126,6 +126,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, ) #endif /* HAVE_MEMCPY_IFUNC */ +#if HAVE_MEMMOVE_IFUNC + IFUNC_IMPL (i, name, memmove, +# if HAVE_MEMMOVE_Z13 + IFUNC_IMPL_ADD (array, i, memmove, + dl_hwcap & HWCAP_S390_VX, MEMMOVE_Z13) +# endif +# if HAVE_MEMMOVE_C + IFUNC_IMPL_ADD (array, i, memmove, 1, MEMMOVE_C) +# endif + ) +#endif /* HAVE_MEMMOVE_IFUNC */ + #ifdef HAVE_S390_VX_ASM_SUPPORT # define IFUNC_VX_IMPL(FUNC) \ |