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AArch64: Use __memcpy_simd on Neoverse N2/V1

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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 e11ed9d2b4)
This commit is contained in:
Wilco Dijkstra 2020-10-14 13:56:21 +01:00
parent be3eaffd5a
commit 28ff0f650c
3 changed files with 8 additions and 2 deletions
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3
sysdeps/aarch64/multiarch/memcpy.c
View File

@ -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)))));

3
sysdeps/aarch64/multiarch/memmove.c
View File

@ -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))));

4
sysdeps/unix/sysv/linux/aarch64/cpu-features.h
View File

@ -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
{