Support dynamic dual/quad loop selection on aarch64

[vpp.git] / src / cmake / cpu.cmake

diff --git a/src/cmake/cpu.cmake b/src/cmake/cpu.cmake
index 0e1171d..20dab7b 100644 (file)
--- a/src/cmake/cpu.cmake
+++ b/src/cmake/cpu.cmake
@@ -11,12 +11,50 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+##############################################################################
+# Cache line size detection
+##############################################################################
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
+  file(READ "/proc/cpuinfo" cpuinfo)
+  string(REPLACE "\n" ";" cpuinfo ${cpuinfo})
+  foreach(l ${cpuinfo})
+    string(REPLACE ":" ";" l ${l})
+    list(GET l 0 name)
+    list(GET l 1 value)
+    string(STRIP ${name} name)
+    string(STRIP ${value} value)
+    if(${name} STREQUAL "CPU implementer")
+      set(CPU_IMPLEMENTER ${value})
+    endif()
+    if(${name} STREQUAL "CPU part")
+      set(CPU_PART ${value})
+    endif()
+  endforeach()
+  # Implementer 0x43 - Cavium
+  #  Part 0x0af - ThunderX2 is 64B, rest all are 128B
+  if (${CPU_IMPLEMENTER} STREQUAL "0x43")
+    if (${CPU_PART} STREQUAL "0x0af")
+      set(VPP_LOG2_CACHE_LINE_SIZE 6)
+    else()
+      set(VPP_LOG2_CACHE_LINE_SIZE 7)
+    endif()
+  else()
+      set(VPP_LOG2_CACHE_LINE_SIZE 6)
+  endif()
+  math(EXPR VPP_CACHE_LINE_SIZE "1 << ${VPP_LOG2_CACHE_LINE_SIZE}")
+  message(STATUS "ARM AArch64 CPU implementer ${CPU_IMPLEMENTER} part ${CPU_PART} cacheline size ${VPP_CACHE_LINE_SIZE}")
+else()
+  set(VPP_LOG2_CACHE_LINE_SIZE 6)
+endif()
+
+set(VPP_LOG2_CACHE_LINE_SIZE ${VPP_LOG2_CACHE_LINE_SIZE}
+    CACHE STRING "Target CPU cache line size (power of 2)")
+
 ##############################################################################
 # CPU optimizations and multiarch support
 ##############################################################################
 if(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64.*|x86_64.*|AMD64.*")
   set(CMAKE_C_FLAGS "-march=corei7 -mtune=corei7-avx ${CMAKE_C_FLAGS}")
-  set(VPP_LIB_DIR_NAME lib64)
   check_c_compiler_flag("-march=core-avx2" compiler_flag_march_core_avx2)
   if(compiler_flag_march_core_avx2)
     list(APPEND MARCH_VARIANTS "avx2\;-march=core-avx2 -mtune=core-avx2")
@@ -27,9 +65,22 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64.*|x86_64.*|AMD64.*")
   endif()
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
   set(CMAKE_C_FLAGS "-march=armv8-a+crc ${CMAKE_C_FLAGS}")
-  set(VPP_LIB_DIR_NAME lib64)
-else()
-  set(VPP_LIB_DIR_NAME lib)
+  check_c_compiler_flag("-march=armv8-a+crc+crypto -mtune=qdf24xx" compiler_flag_march_core_qdf24xx)
+  if(compiler_flag_march_core_qdf24xx)
+    list(APPEND MARCH_VARIANTS "qdf24xx\;-march=armv8-a+crc+crypto -DCLIB_N_PREFETCHES=8")
+  endif()
+  check_c_compiler_flag("-march=armv8.1-a+crc+crypto -mtune=thunderx2t99" compiler_flag_march_thunderx2t99)
+  if(compiler_flag_march_thunderx2t99)
+    if (CMAKE_C_COMPILER_VERSION VERSION_GREATER 7.3)
+      list(APPEND MARCH_VARIANTS "thunderx2t99\;-march=armv8.1-a+crc+crypto -mtune=thunderx2t99 -DCLIB_N_PREFETCHES=8")
+    else()
+      list(APPEND MARCH_VARIANTS "thunderx2t99\;-march=armv8.1-a+crc+crypto -DCLIB_N_PREFETCHES=8")
+    endif()
+  endif()
+  check_c_compiler_flag("-march=armv8-a+crc+crypto -mtune=cortex-a72" compiler_flag_march_cortexa72)
+  if(compiler_flag_march_cortexa72)
+    list(APPEND MARCH_VARIANTS "cortexa72\;-march=armv8-a+crc+crypto -mtune=cortex-a72 -DCLIB_N_PREFETCHES=6")
+  endif()
 endif()
 
 macro(vpp_library_set_multiarch_sources lib)