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IFUNC for Cavium ThunderX2
* sysdeps/aarch64/multiarch/Makefile (sysdep_routines): Add memcpy_thunderx2. * sysdeps/aarch64/multiarch/ifunc-impl-list.c (MAX_IFUNC): Increment to 4. (__libc_ifunc_impl_list): Add __memcpy_thunderx2. * sysdeps/aarch64/multiarch/memcpy.c (libc_ifunc): Add IS_THUNDERX2 and IS_THUNDERX2PA checks. * sysdeps/aarch64/multiarch/memcpy_thunderx.S (USE_THUNDERX2): Use macro to set name appropriately. (memcpy): Use USE_THUNDERX2 macro to modify prefetches. * sysdeps/aarch64/multiarch/memcpy_thunderx2.S: New file. * sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_THUNDERX2PA): New macro. (IS_THUNDERX2): New macro.
This commit is contained in:
Steve Ellcey
parent
da81ae645d
commit
e9537dddc7
17
ChangeLog
17
ChangeLog
@ -1,3 +1,20 @@
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2018-02-22 Steve Ellcey <sellcey@cavium.com>
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* sysdeps/aarch64/multiarch/Makefile (sysdep_routines):
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Add memcpy_thunderx2.
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* sysdeps/aarch64/multiarch/ifunc-impl-list.c (MAX_IFUNC):
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Increment to 4.
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(__libc_ifunc_impl_list): Add __memcpy_thunderx2.
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* sysdeps/aarch64/multiarch/memcpy.c (libc_ifunc): Add IS_THUNDERX2
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and IS_THUNDERX2PA checks.
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* sysdeps/aarch64/multiarch/memcpy_thunderx.S (USE_THUNDERX2):
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Use macro to set name appropriately.
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(memcpy): Use USE_THUNDERX2 macro to modify prefetches.
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* sysdeps/aarch64/multiarch/memcpy_thunderx2.S: New file.
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* sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_THUNDERX2PA):
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New macro.
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(IS_THUNDERX2): New macro.
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2018-02-22 Stefan Liebler <stli@linux.vnet.ibm.com>
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* sysdeps/s390/fpu/libm-test-ulps: Regenerated.
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@ -1,4 +1,4 @@
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ifeq ($(subdir),string)
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sysdep_routines += memcpy_generic memcpy_thunderx memcpy_falkor \
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memmove_falkor memset_generic memset_falkor
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sysdep_routines += memcpy_generic memcpy_thunderx memcpy_thunderx2 \
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memcpy_falkor memmove_falkor memset_generic memset_falkor
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endif
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@ -25,7 +25,7 @@
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#include <stdio.h>
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/* Maximum number of IFUNC implementations. */
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#define MAX_IFUNC 3
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#define MAX_IFUNC 4
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size_t
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__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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@ -40,6 +40,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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/* Support sysdeps/aarch64/multiarch/memcpy.c and memmove.c. */
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IFUNC_IMPL (i, name, memcpy,
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IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_thunderx)
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IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_thunderx2)
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IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_falkor)
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IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_generic))
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IFUNC_IMPL (i, name, memmove,
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@ -30,6 +30,7 @@ extern __typeof (__redirect_memcpy) __libc_memcpy;
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extern __typeof (__redirect_memcpy) __memcpy_generic attribute_hidden;
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extern __typeof (__redirect_memcpy) __memcpy_thunderx attribute_hidden;
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extern __typeof (__redirect_memcpy) __memcpy_thunderx2 attribute_hidden;
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extern __typeof (__redirect_memcpy) __memcpy_falkor attribute_hidden;
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libc_ifunc (__libc_memcpy,
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@ -37,7 +38,9 @@ libc_ifunc (__libc_memcpy,
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? __memcpy_thunderx
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: (IS_FALKOR (midr)
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? __memcpy_falkor
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: __memcpy_generic)));
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: (IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr)
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? __memcpy_thunderx2
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: __memcpy_generic))));
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# undef memcpy
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strong_alias (__libc_memcpy, memcpy);
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@ -74,11 +74,13 @@
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#if IS_IN (libc)
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# undef MEMCPY
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# define MEMCPY __memcpy_thunderx
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# undef MEMMOVE
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# define MEMMOVE __memmove_thunderx
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# define USE_THUNDERX
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# ifndef USE_THUNDERX2
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# undef MEMCPY
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# define MEMCPY __memcpy_thunderx
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# undef MEMMOVE
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# define MEMMOVE __memmove_thunderx
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# define USE_THUNDERX
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# endif
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ENTRY_ALIGN (MEMMOVE, 6)
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@ -180,7 +182,7 @@ L(copy96):
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.p2align 4
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L(copy_long):
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# ifdef USE_THUNDERX
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# if defined(USE_THUNDERX) || defined (USE_THUNDERX2)
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/* On thunderx, large memcpy's are helped by software prefetching.
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This loop is identical to the one below it but with prefetching
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@ -194,7 +196,11 @@ L(copy_long):
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bic dst, dstin, 15
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ldp D_l, D_h, [src]
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sub src, src, tmp1
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# if defined(USE_THUNDERX)
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prfm pldl1strm, [src, 384]
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# elif defined(USE_THUNDERX2)
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prfm pldl1strm, [src, 256]
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# endif
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add count, count, tmp1 /* Count is now 16 too large. */
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ldp A_l, A_h, [src, 16]
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stp D_l, D_h, [dstin]
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@ -204,9 +210,13 @@ L(copy_long):
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subs count, count, 128 + 16 /* Test and readjust count. */
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L(prefetch_loop64):
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# if defined(USE_THUNDERX)
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tbz src, #6, 1f
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prfm pldl1strm, [src, 512]
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1:
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# elif defined(USE_THUNDERX2)
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prfm pldl1strm, [src, 256]
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# endif
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stp A_l, A_h, [dst, 16]
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ldp A_l, A_h, [src, 16]
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stp B_l, B_h, [dst, 32]
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27
sysdeps/aarch64/multiarch/memcpy_thunderx2.S
Normal file
27
sysdeps/aarch64/multiarch/memcpy_thunderx2.S
Normal file
@ -0,0 +1,27 @@
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/* A Thunderx2 Optimized memcpy implementation for AARCH64.
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Copyright (C) 2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* The actual code in this memcpy and memmove is in memcpy_thunderx.S.
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The only real differences are with the prefetching instructions. */
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#define MEMCPY __memcpy_thunderx2
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#define MEMMOVE __memmove_thunderx2
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#define USE_THUNDERX2
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#include "memcpy_thunderx.S"
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@ -41,6 +41,11 @@
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#define IS_THUNDERX(midr) (MIDR_IMPLEMENTOR(midr) == 'C' \
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&& MIDR_PARTNUM(midr) == 0x0a1)
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#define IS_THUNDERX2PA(midr) (MIDR_IMPLEMENTOR(midr) == 'B' \
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&& MIDR_PARTNUM(midr) == 0x516)
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#define IS_THUNDERX2(midr) (MIDR_IMPLEMENTOR(midr) == 'C' \
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&& MIDR_PARTNUM(midr) == 0xaf)
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#define IS_FALKOR(midr) (MIDR_IMPLEMENTOR(midr) == 'Q' \
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&& MIDR_PARTNUM(midr) == 0xc00)
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