diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | configure.ac | 16 | ||||
| -rw-r--r-- | m4/ax_check_compile_flag.m4 | 74 | ||||
| -rw-r--r-- | m4/ax_check_simd.m4 | 82 |
4 files changed, 173 insertions, 0 deletions
@@ -12,6 +12,7 @@ aclocal.m4 acinclude.m4 aminclude.am m4/*.m4 +!m4/ax_*.m4 autom4te.cache config.cache config.h* diff --git a/configure.ac b/configure.ac index a18197d7..672a6dff 100644 --- a/configure.ac +++ b/configure.ac @@ -226,6 +226,22 @@ then CPPFLAGS+=" -fsanitize=address -fsanitize=undefined" fi +AC_ARG_ENABLE(simd, + [AS_HELP_STRING( + [--disable-simd], + [Disable SIMD support] + )], + [simd=$enableval], [simd="yes"]) +if test x"$simd" = x"yes" +then + # Find and define supported SIMD extensions + AX_CHECK_SIMD +else + AM_CONDITIONAL(HAVE_AVX2, false) + AM_CONDITIONAL(HAVE_SSE3, false) + AM_CONDITIONAL(HAVE_SSE4_1, false) +fi + AC_OUTPUT( libosmocore.pc libosmocodec.pc diff --git a/m4/ax_check_compile_flag.m4 b/m4/ax_check_compile_flag.m4 new file mode 100644 index 00000000..dcabb92a --- /dev/null +++ b/m4/ax_check_compile_flag.m4 @@ -0,0 +1,74 @@ +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT]) +# +# DESCRIPTION +# +# Check whether the given FLAG works with the current language's compiler +# or gives an error. (Warnings, however, are ignored) +# +# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on +# success/failure. +# +# If EXTRA-FLAGS is defined, it is added to the current language's default +# flags (e.g. CFLAGS) when the check is done. The check is thus made with +# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to +# force the compiler to issue an error when a bad flag is given. +# +# INPUT gives an alternative input source to AC_COMPILE_IFELSE. +# +# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this +# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG. +# +# LICENSE +# +# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> +# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> +# +# This program is free software: you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation, either version 3 of the License, or (at your +# option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +# Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program. If not, see <https://www.gnu.org/licenses/>. +# +# As a special exception, the respective Autoconf Macro's copyright owner +# gives unlimited permission to copy, distribute and modify the configure +# scripts that are the output of Autoconf when processing the Macro. You +# need not follow the terms of the GNU General Public License when using +# or distributing such scripts, even though portions of the text of the +# Macro appear in them. The GNU General Public License (GPL) does govern +# all other use of the material that constitutes the Autoconf Macro. +# +# This special exception to the GPL applies to versions of the Autoconf +# Macro released by the Autoconf Archive. When you make and distribute a +# modified version of the Autoconf Macro, you may extend this special +# exception to the GPL to apply to your modified version as well. + +#serial 5 + +AC_DEFUN([AX_CHECK_COMPILE_FLAG], +[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl +AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ + ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS + _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" + AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], + [AS_VAR_SET(CACHEVAR,[yes])], + [AS_VAR_SET(CACHEVAR,[no])]) + _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) +AS_VAR_IF(CACHEVAR,yes, + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_COMPILE_FLAGS diff --git a/m4/ax_check_simd.m4 b/m4/ax_check_simd.m4 new file mode 100644 index 00000000..d07d706f --- /dev/null +++ b/m4/ax_check_simd.m4 @@ -0,0 +1,82 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_ext.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_EXT +# +# DESCRIPTION +# +# Find supported SIMD extensions by requesting cpuid. When an SIMD +# extension is found, the -m"simdextensionname" is added to SIMD_FLAGS if +# compiler supports it. For example, if "sse2" is available, then "-msse2" +# is added to SIMD_FLAGS. +# +# This macro calls: +# +# AC_SUBST(SIMD_FLAGS) +# +# And defines: +# +# HAVE_AVX3 / HAVE_SSE3 / HAVE_SSE4.1 +# +# LICENSE +# +# Copyright (c) 2007 Christophe Tournayre <turn3r@users.sourceforge.net> +# Copyright (c) 2013 Michael Petch <mpetch@capp-sysware.com> +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. This file is offered as-is, without any +# warranty. +# +# NOTE: The functionality that requests the cpuid has been stripped because +# this project detects the CPU capabilities during runtime. However, we +# still need to check if the compiler supports the requested SIMD flag. + +#serial 12 + +AC_DEFUN([AX_CHECK_SIMD], +[ + AC_REQUIRE([AC_CANONICAL_HOST]) + + case $host_cpu in + i[[3456]]86*|x86_64*|amd64*) + AX_CHECK_COMPILE_FLAG(-mavx2, ax_cv_support_avx2_ext=yes, []) + if test x"$ax_cv_support_avx2_ext" = x"yes"; then + SIMD_FLAGS="$SIMD_FLAGS -mavx2" + AC_DEFINE(HAVE_AVX2,, + [Support AVX2 (Advanced Vector Extensions 2) instructions]) + AM_CONDITIONAL(HAVE_AVX2, true) + else + AC_MSG_WARN([Your compiler does not support AVX2 instructions]) + AM_CONDITIONAL(HAVE_AVX2, false) + fi + + AX_CHECK_COMPILE_FLAG(-msse3, ax_cv_support_sse3_ext=yes, []) + if test x"$ax_cv_support_sse3_ext" = x"yes"; then + SIMD_FLAGS="$SIMD_FLAGS -msse3" + AC_DEFINE(HAVE_SSE3,, + [Support SSE3 (Streaming SIMD Extensions 3) instructions]) + AM_CONDITIONAL(HAVE_SSE3, true) + else + AC_MSG_WARN([Your compiler does not support SSE3 instructions]) + AM_CONDITIONAL(HAVE_SSE3, false) + fi + + AX_CHECK_COMPILE_FLAG(-msse4.1, ax_cv_support_sse41_ext=yes, []) + if test x"$ax_cv_support_sse41_ext" = x"yes"; then + SIMD_FLAGS="$SIMD_FLAGS -msse4.1" + AC_DEFINE(HAVE_SSE4_1,, + [Support SSE4.1 (Streaming SIMD Extensions 4.1) instructions]) + AM_CONDITIONAL(HAVE_SSE4_1, true) + else + AC_MSG_WARN([Your compiler does not support SSE4.1 instructions]) + AM_CONDITIONAL(HAVE_SSE4_1, false) + fi + ;; + esac + + AC_SUBST(SIMD_FLAGS) +]) |