[glibc/release/2.28/master] AArch64: Use __memcpy_simd on Neoverse N2/V1

[Wilco Dijkstra]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e5dac996b9c5541d5c677565d4102566734202c4

commit e5dac996b9c5541d5c677565d4102566734202c4
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 18b5f51543..e69a1ae5af 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 bc3f2e566d..b426dad834 100644
--- a/sysdeps/aarch64/multiarch/memmove.c
+++ b/sysdeps/aarch64/multiarch/memmove.c
@@ -38,7 +38,8 @@ libc_ifunc (__libc_memmove,
 	     ? __memmove_thunderx
 	     : (IS_FALKOR (midr) || IS_PHECDA (midr)
 		? __memmove_falkor
-		  : (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 c52ed7fc12..fbe1148652 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)
 
 struct cpu_features
 {