diff options
| 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/ifunc-memcpy.h | |
| parent | 2ee1bc57ab50737ee2ab88c4d796b90e08b4bf93 (diff) | |
| download | glibc-cdd927d98cc38acf55e1c6594b5c9451df8f239f.tar glibc-cdd927d98cc38acf55e1c6594b5c9451df8f239f.tar.gz glibc-cdd927d98cc38acf55e1c6594b5c9451df8f239f.tar.bz2 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/ifunc-memcpy.h')
| -rw-r--r-- | sysdeps/s390/ifunc-memcpy.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sysdeps/s390/ifunc-memcpy.h b/sysdeps/s390/ifunc-memcpy.h index 51c71baa2c..0e701968c8 100644 --- a/sysdeps/s390/ifunc-memcpy.h +++ b/sysdeps/s390/ifunc-memcpy.h @@ -43,6 +43,29 @@ # define HAVE_MEMCPY_Z196 HAVE_MEMCPY_IFUNC #endif +#if defined SHARED && defined USE_MULTIARCH && IS_IN (libc) \ + && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT +# define HAVE_MEMMOVE_IFUNC 1 +#else +# define HAVE_MEMMOVE_IFUNC 0 +#endif + +#ifdef HAVE_S390_VX_ASM_SUPPORT +# define HAVE_MEMMOVE_IFUNC_AND_VX_SUPPORT HAVE_MEMMOVE_IFUNC +#else +# define HAVE_MEMMOVE_IFUNC_AND_VX_SUPPORT 0 +#endif + +#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT +# define MEMMOVE_DEFAULT MEMMOVE_Z13 +# define HAVE_MEMMOVE_C 0 +# define HAVE_MEMMOVE_Z13 1 +#else +# define MEMMOVE_DEFAULT MEMMOVE_C +# define HAVE_MEMMOVE_C 1 +# define HAVE_MEMMOVE_Z13 HAVE_MEMMOVE_IFUNC_AND_VX_SUPPORT +#endif + #if HAVE_MEMCPY_Z900_G5 # define MEMCPY_Z900_G5 __memcpy_default # define MEMPCPY_Z900_G5 __mempcpy_default @@ -66,3 +89,15 @@ # define MEMCPY_Z196 NULL # define MEMPCPY_Z196 NULL #endif + +#if HAVE_MEMMOVE_C +# define MEMMOVE_C __memmove_c +#else +# define MEMMOVE_C NULL +#endif + +#if HAVE_MEMMOVE_Z13 +# define MEMMOVE_Z13 __memmove_z13 +#else +# define MEMMOVE_Z13 NULL +#endif |