diff options
| author | Wilco Dijkstra <wilco.dijkstra@arm.com> | 2023-10-26 17:07:21 +0100 |
|---|---|---|
| committer | Wilco Dijkstra <wilco.dijkstra@arm.com> | 2024-04-08 16:24:27 +0100 |
| commit | cb48c2603a18c9059c1611d82aa257d1b14ae2ab (patch) | |
| tree | af38ed59e289c14e156e6d19c1dd0a8ce1b7ef9c /sysdeps/aarch64/multiarch/memset_falkor.S | |
| parent | 455b1b2b7fd014a283777475aa2a8b73a83f31b9 (diff) | |
| download | glibc-cb48c2603a18c9059c1611d82aa257d1b14ae2ab.tar.gz glibc-cb48c2603a18c9059c1611d82aa257d1b14ae2ab.tar.xz glibc-cb48c2603a18c9059c1611d82aa257d1b14ae2ab.zip | |
AArch64: Add memset_zva64
Add a specialized memset for the common ZVA size of 64 to avoid the overhead of reading the ZVA size. Since the code is identical to __memset_falkor, remove the latter. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> (cherry picked from commit 3d7090f14b13312320e425b27dcf0fe72de026fd)
Diffstat (limited to 'sysdeps/aarch64/multiarch/memset_falkor.S')
| -rw-r--r-- | sysdeps/aarch64/multiarch/memset_falkor.S | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/sysdeps/aarch64/multiarch/memset_falkor.S b/sysdeps/aarch64/multiarch/memset_falkor.S deleted file mode 100644 index c6946a8072..0000000000 --- a/sysdeps/aarch64/multiarch/memset_falkor.S +++ /dev/null @@ -1,54 +0,0 @@ -/* Memset for falkor. - Copyright (C) 2017-2023 Free Software Foundation, Inc. - - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library. If not, see - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include <memset-reg.h> - -/* Reading dczid_el0 is expensive on falkor so move it into the ifunc - resolver and assume ZVA size of 64 bytes. The IFUNC resolver takes care to - use this function only when ZVA is enabled. */ - -#if IS_IN (libc) -.macro zva_macro - .p2align 4 - /* Write the first and last 64 byte aligned block using stp rather - than using DC ZVA. This is faster on some cores. */ - str q0, [dst, 16] - stp q0, q0, [dst, 32] - bic dst, dst, 63 - stp q0, q0, [dst, 64] - stp q0, q0, [dst, 96] - sub count, dstend, dst /* Count is now 128 too large. */ - sub count, count, 128+64+64 /* Adjust count and bias for loop. */ - add dst, dst, 128 -1: dc zva, dst - add dst, dst, 64 - subs count, count, 64 - b.hi 1b - stp q0, q0, [dst, 0] - stp q0, q0, [dst, 32] - stp q0, q0, [dstend, -64] - stp q0, q0, [dstend, -32] - ret -.endm - -# define ZVA_MACRO zva_macro -# define MEMSET __memset_falkor -# include <sysdeps/aarch64/memset.S> -#endif |