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authorLijian.Zhang <Lijian.Zhang@arm.com>2020-02-18 19:58:19 +0800
committerDamjan Marion <dmarion@me.com>2020-04-30 10:18:39 +0000
commit690ce8672c090709924b924af1e49ffc38d8f00c (patch)
tree68bb72374590e850fe0958fba2a236f83f8ac171
parente09912001f1e62a39b033b3e1c14854dc7c6f52f (diff)
build: support arch-specific compiling for Neoverse N1
Enable arch-specific compiling and dynamic optimal function selection for Arm Neoverse-N1. Support for -march=armv8.2-a+crc+crypto -mtune=neoverse-n1 for Neoverse-N1 is added starting from gcc-9.2.0 without change with change improvement [L2 - 1x flows] 11.00 Mpps 11.46 Mpps 4% [L2 - 10Kx flows] 6.83 Mpps 7.17 Mpps 5% [L3 - 1x flows] 10.39 Mpps 10.78 Mpps 3.7% [L3 - 10Kx flows] 6.67 Mpps 7.19 Mpps 7.8% Type: feature Change-Id: I5d24d17820b3dd6909b913202e8c31fc7d48650f Signed-off-by: Lijian Zhang <Lijian.Zhang@arm.com> Reviewed-by: Jieqiang Wang <Jieqiang.Wang@arm.com> Reviewed-by: Govindarajan Mohandoss <Govindarajan.Mohandoss@arm.com>
-rw-r--r--src/cmake/cpu.cmake4
-rw-r--r--src/vppinfra/cpu.h11
2 files changed, 15 insertions, 0 deletions
diff --git a/src/cmake/cpu.cmake b/src/cmake/cpu.cmake
index 916fe0d1ddd..0ce8bea31ec 100644
--- a/src/cmake/cpu.cmake
+++ b/src/cmake/cpu.cmake
@@ -107,6 +107,10 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
if(compiler_flag_march_cortexa72)
list(APPEND MARCH_VARIANTS "cortexa72\;-march=armv8-a+crc+crypto -mtune=cortex-a72 -DCLIB_N_PREFETCHES=6")
endif()
+ check_c_compiler_flag("-march=armv8.2-a+crc+crypto -mtune=neoverse-n1" compiler_flag_march_neoversen1)
+ if(compiler_flag_march_neoversen1)
+ list(APPEND MARCH_VARIANTS "neoversen1\;-march=armv8.2-a+crc+crypto -mtune=neoverse-n1 -DCLIB_N_PREFETCHES=6")
+ endif()
endif()
macro(vpp_library_set_multiarch_sources lib)
diff --git a/src/vppinfra/cpu.h b/src/vppinfra/cpu.h
index 48c68a11699..7bd5dfe9722 100644
--- a/src/vppinfra/cpu.h
+++ b/src/vppinfra/cpu.h
@@ -322,6 +322,8 @@ clib_cpu_part ()
#define AARCH64_CPU_PART_QDF24XX 0xc00
#define AARCH64_CPU_IMPLEMENTER_CORTEXA72 0x41
#define AARCH64_CPU_PART_CORTEXA72 0xd08
+#define AARCH64_CPU_IMPLEMENTER_NEOVERSEN1 0x41
+#define AARCH64_CPU_PART_NEOVERSEN1 0xd0c
static inline int
clib_cpu_march_priority_thunderx2t99 ()
@@ -350,6 +352,15 @@ clib_cpu_march_priority_cortexa72 ()
return -1;
}
+static inline int
+clib_cpu_march_priority_neoversen1 ()
+{
+ if ((AARCH64_CPU_IMPLEMENTER_NEOVERSEN1 == clib_cpu_implementer ()) &&
+ (AARCH64_CPU_PART_NEOVERSEN1 == clib_cpu_part ()))
+ return 10;
+ return -1;
+}
+
#ifdef CLIB_MARCH_VARIANT
#define CLIB_MARCH_FN_PRIORITY() CLIB_MARCH_SFX(clib_cpu_march_priority)()
#else