X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fcmake%2Fcpu.cmake;h=623c9ded88e3e1acc17969a5a9db6ca5adf1c639;hb=7d527a2292bdabc84ff070f5b27f35c0e858cddd;hp=bdc9014d944596494f891a86f5333d8b7ecaea15;hpb=79dcbc74cd417f4caf41bc398ccba94cab7d656b;p=vpp.git

diff --git a/src/cmake/cpu.cmake b/src/cmake/cpu.cmake
index bdc9014d944..623c9ded88e 100644
--- a/src/cmake/cpu.cmake
+++ b/src/cmake/cpu.cmake
@@ -14,7 +14,12 @@
 ##############################################################################
 # Cache line size detection
 ##############################################################################
-if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
+if(CMAKE_CROSSCOMPILING)
+  message(STATUS "Cross-compiling - cache line size detection disabled")
+  set(VPP_LOG2_CACHE_LINE_SIZE 6)
+elseif(DEFINED VPP_LOG2_CACHE_LINE_SIZE)
+  # Cache line size assigned via cmake args
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
   file(READ "/proc/cpuinfo" cpuinfo)
   string(REPLACE "\n" ";" cpuinfo ${cpuinfo})
   foreach(l ${cpuinfo})
@@ -50,29 +55,92 @@ endif()
 set(VPP_LOG2_CACHE_LINE_SIZE ${VPP_LOG2_CACHE_LINE_SIZE}
     CACHE STRING "Target CPU cache line size (power of 2)")
 
+##############################################################################
+# Gnu Assembler AVX-512 bug detection
+# - see: https://sourceware.org/bugzilla/show_bug.cgi?id=23465
+##############################################################################
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64.*|x86_64.*|AMD64.*")
+  if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+    set(pfx ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/gas_avx512_bug_test)
+    file(WRITE ${pfx}.s "vmovaps 0x40(,%rax), %zmm0\n")
+    execute_process(COMMAND ${CMAKE_C_COMPILER} -c ${pfx}.s -o ${pfx}.o)
+    execute_process(COMMAND objdump -s ${pfx}.o OUTPUT_VARIABLE _output)
+    if (NOT _output MATCHES "62f17c48 28040540 000000")
+      set(GNU_ASSEMBLER_AVX512_BUG 1)
+    endif()
+  endif()
+endif()
+
 ##############################################################################
 # 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}")
-  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")
+  check_c_compiler_flag("-march=haswell" compiler_flag_march_haswell)
+  if(compiler_flag_march_haswell)
+    list(APPEND MARCH_VARIANTS "hsw\;-march=haswell -mtune=haswell")
   endif()
-  check_c_compiler_flag("-march=skylake-avx512" compiler_flag_march_skylake_avx512)
-  if(compiler_flag_march_skylake_avx512)
-    list(APPEND MARCH_VARIANTS "avx512\;-march=skylake-avx512 -mtune=skylake-avx512")
+  check_c_compiler_flag("-march=tremont" compiler_flag_march_tremont)
+  if(compiler_flag_march_tremont)
+    list(APPEND MARCH_VARIANTS "trm\;-march=tremont -mtune=tremont")
+  endif()
+  if (GNU_ASSEMBLER_AVX512_BUG)
+     message(WARNING "AVX-512 multiarch variant(s) disabled due to GNU Assembler bug")
+  else()
+    check_c_compiler_flag("-mprefer-vector-width=256" compiler_flag_mprefer_vector_width)
+    check_c_compiler_flag("-march=skylake-avx512" compiler_flag_march_skylake_avx512)
+    check_c_compiler_flag("-march=icelake-client" compiler_flag_march_icelake_client)
+    if(compiler_flag_march_skylake_avx512 AND compiler_flag_mprefer_vector_width)
+      list(APPEND MARCH_VARIANTS "skx\;-march=skylake-avx512 -mtune=skylake-avx512 -mprefer-vector-width=256")
+    endif()
+    if(compiler_flag_march_icelake_client AND compiler_flag_mprefer_vector_width)
+      list(APPEND MARCH_VARIANTS "icl\;-march=icelake-client -mtune=icelake-client -mprefer-vector-width=512")
+    endif()
   endif()
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
   set(CMAKE_C_FLAGS "-march=armv8-a+crc ${CMAKE_C_FLAGS}")
+  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=armv8.2-a+crc+crypto+lse" compiler_flag_march_core_octeontx2)
+  if(compiler_flag_march_core_octeontx2)
+    list(APPEND MARCH_VARIANTS "octeontx2\;-march=armv8.2-a+crc+crypto+lse -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_ID STREQUAL "GNU" AND (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 8.3))
+      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()
+  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)
+  cmake_parse_arguments(ARG
+    ""
+    ""
+    "SOURCES;DEPENDS"
+    ${ARGN}
+  )
+
   foreach(V ${MARCH_VARIANTS})
     list(GET V 0 VARIANT)
     list(GET V 1 VARIANT_FLAGS)
     set(l ${lib}_${VARIANT})
-    add_library(${l} OBJECT ${ARGN})
+    add_library(${l} OBJECT ${ARG_SOURCES})
+    if(ARG_DEPENDS)
+      add_dependencies(${l} ${ARG_DEPENDS})
+    endif()
     set_target_properties(${l} PROPERTIES POSITION_INDEPENDENT_CODE ON)
     target_compile_options(${l} PUBLIC "-DCLIB_MARCH_VARIANT=${VARIANT}")
     separate_arguments(VARIANT_FLAGS)