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From: Wilco Dijkstra <wilco@sourceware.org>
To: glibc-cvs@sourceware.org
Subject: [glibc/release/2.30/master] AArch64: Use __memcpy_simd on Neoverse N2/V1
Date: Wed, 14 Oct 2020 16:00:37 +0000 (GMT) [thread overview]
Message-ID: <20201014160037.80A713857C77@sourceware.org> (raw)
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=24c0d6881503d00d06b4f9141678df2925c0b5a8
commit 24c0d6881503d00d06b4f9141678df2925c0b5a8
Author: Wilco Dijkstra <wdijkstr@arm.com>
Date: Wed Oct 14 13:56:21 2020 +0100
AArch64: Use __memcpy_simd on Neoverse N2/V1
Add CPU detection of Neoverse N2 and Neoverse V1, and select __memcpy_simd as
the memcpy/memmove ifunc.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit e11ed9d2b4558eeacff81557dc9557001af42a6b)
Diff:
---
sysdeps/aarch64/multiarch/memcpy.c | 3 ++-
sysdeps/aarch64/multiarch/memmove.c | 3 ++-
sysdeps/unix/sysv/linux/aarch64/cpu-features.h | 4 ++++
3 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/sysdeps/aarch64/multiarch/memcpy.c b/sysdeps/aarch64/multiarch/memcpy.c
index be23c1ef02..1528d89e54 100644
--- a/sysdeps/aarch64/multiarch/memcpy.c
+++ b/sysdeps/aarch64/multiarch/memcpy.c
@@ -41,7 +41,8 @@ libc_ifunc (__libc_memcpy,
? __memcpy_falkor
: (IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr)
? __memcpy_thunderx2
- : (IS_NEOVERSE_N1 (midr)
+ : (IS_NEOVERSE_N1 (midr) || IS_NEOVERSE_N2 (midr)
+ || IS_NEOVERSE_V1 (midr)
? __memcpy_simd
: __memcpy_generic)))));
diff --git a/sysdeps/aarch64/multiarch/memmove.c b/sysdeps/aarch64/multiarch/memmove.c
index 71753f2880..60a0b250b9 100644
--- a/sysdeps/aarch64/multiarch/memmove.c
+++ b/sysdeps/aarch64/multiarch/memmove.c
@@ -41,7 +41,8 @@ libc_ifunc (__libc_memmove,
? __memmove_falkor
: (IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr)
? __memmove_thunderx2
- : (IS_NEOVERSE_N1 (midr)
+ : (IS_NEOVERSE_N1 (midr) || IS_NEOVERSE_N2 (midr)
+ || IS_NEOVERSE_V1 (midr)
? __memmove_simd
: __memmove_generic)))));
diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.h b/sysdeps/unix/sysv/linux/aarch64/cpu-features.h
index 85ba3b3d94..0877013a10 100644
--- a/sysdeps/unix/sysv/linux/aarch64/cpu-features.h
+++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.h
@@ -53,6 +53,10 @@
&& MIDR_PARTNUM(midr) == 0x000)
#define IS_NEOVERSE_N1(midr) (MIDR_IMPLEMENTOR(midr) == 'A' \
&& MIDR_PARTNUM(midr) == 0xd0c)
+#define IS_NEOVERSE_N2(midr) (MIDR_IMPLEMENTOR(midr) == 'A' \
+ && MIDR_PARTNUM(midr) == 0xd49)
+#define IS_NEOVERSE_V1(midr) (MIDR_IMPLEMENTOR(midr) == 'A' \
+ && MIDR_PARTNUM(midr) == 0xd40)
#define IS_EMAG(midr) (MIDR_IMPLEMENTOR(midr) == 'P' \
&& MIDR_PARTNUM(midr) == 0x000)
reply other threads:[~2020-10-14 16:00 UTC|newest]
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