diff options
Diffstat (limited to 'BUILD/check-cpu')
| -rwxr-xr-x | BUILD/check-cpu | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/BUILD/check-cpu b/BUILD/check-cpu new file mode 100755 index 00000000..d62e1545 --- /dev/null +++ b/BUILD/check-cpu @@ -0,0 +1,330 @@ +#!/bin/sh +# Copyright (c) 2005, 2010, Oracle and/or its affiliates. +# +# 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; version 2 of the License. +# +# 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, write to the Free Software +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA + +# +# Check cpu of current machine and find the +# best compiler optimization flags for gcc +# Will return result in: +# cpu_arg : Type of CPU +# low_cpu_arg : Type of CPU used up until GCC v3.3 +# check_cpu_args : Arguments for GCC compiler settings +# + +check_compiler_cpu_flags () { + # different compiler versions have different option names + # for CPU specific command line options + if test -z "$CC" ; then + cc="gcc"; + else + cc=$CC + fi + + # check if compiler is gcc and dump its version + cc_verno=`$cc -dumpversion 2>/dev/null` + if test "x$?" = "x0" ; then + set -- `echo $cc_verno | tr '.' ' '` + cc_ver="GCC" + cc_major=$1 + cc_minor=$2 + cc_patch=$3 + if test -z "$cc_minor"; then + cc_minor="0"; + fi + if test -z "$cc_patch"; then + cc_minor="0"; + fi + cc_comp=`expr $cc_major '*' 100 '+' $cc_minor` + fi + + case "$cc_ver--$cc_verno" in + *GCC*) + # different gcc backends (and versions) have different CPU flags + case `gcc -dumpmachine` in + i?86-* | x86_64-*) + if test "$cc_comp" -lt 304 ; then + check_cpu_cflags="-mcpu=${low_cpu_arg}" + elif test "$cc_comp" -ge 402 ; then + check_cpu_cflags="-mtune=native" + else + check_cpu_cflags="-mtune=${cpu_arg}" + fi + ;; + ppc-*) + check_cpu_cflags="-mcpu=${cpu_arg} -mtune=${cpu_arg}" + ;; + *) + check_cpu_cflags="" + return + ;; + esac + ;; + 2.95.*) + # GCC 2.95 doesn't expose its name in --version output + check_cpu_cflags="-m${cpu_arg}" + ;; + *) + check_cpu_cflags="" + return + ;; + esac + + # now we check whether the compiler really understands the cpu type + touch __test.c + + while [ "$cpu_arg" ] ; do + printf "testing $cpu_arg ... " >&2 + + # compile check + eval "$cc -c $check_cpu_cflags __test.c" 2>/dev/null + if test "x$?" = "x0" ; then + echo ok >&2 + break; + fi + + echo failed >&2 + check_cpu_cflags="" + break; + done + rm __test.* + return 0 +} + +check_cpu () { + CPUINFO=/proc/cpuinfo + if test -n "$TEST_CPUINFO" ; then + CPUINFO=$TEST_CPUINFO + fi + if test -r "$CPUINFO" -a "$CPUINFO" != " " ; then + # on Linux (and others?) we can get detailed CPU information out of /proc + cpuinfo="cat $CPUINFO" + + # detect CPU architecture + cpu_arch=`$cpuinfo | grep 'arch' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1` + + # detect CPU family + cpu_family=`$cpuinfo | grep 'family' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1` + if test -z "$cpu_family" ; then + cpu_family=`$cpuinfo | grep 'cpu' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1` + fi + + # detect CPU vendor and model + cpu_vendor=`$cpuinfo | grep 'vendor_id' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1` + model_name=`$cpuinfo | grep 'model name' | cut -d ':' -f 2 | head -1` + if test -z "$model_name" ; then + model_name=`$cpuinfo | grep 'cpu model' | cut -d ':' -f 2 | head -1` + fi + + # fallback: get CPU model from uname output + if test -z "$model_name" ; then + model_name=`uname -m` + fi + + # parse CPU flags + for flag in `$cpuinfo | grep '^flags' | sed -e 's/^flags.*: //' -e 's/[^a-zA-Z0-9_ ]/_/g'`; do + eval cpu_flag_$flag=yes + done + else + # Fallback when there is no /proc/cpuinfo + CPUINFO=" " + case "`uname -s`" in + FreeBSD|OpenBSD) + cpu_family=`uname -m`; + model_name=`sysctl -n hw.model` + ;; + Darwin) + cpu_family=`sysctl -n machdep.cpu.vendor` + model_name=`sysctl -n machdep.cpu.brand_string` + if [ -z "$cpu_family" -o -z "$model_name" ] + then + cpu_family=`uname -p` + model_name=`machine` + fi + ;; + *) + cpu_family=`uname -p`; + model_name=`uname -m`; + ;; + esac + fi + + # detect CPU shortname as used by gcc options + # this list is not complete, feel free to add further entries + cpu_arg="" + low_cpu_arg="" + case "$cpu_vendor--$cpu_family--$model_name--$spu_arch" in + # DEC Alpha + *Alpha*EV6*) + cpu_arg="ev6"; + ;; + #Core 2 Duo + *Intel*Core\(TM\)2*) + cpu_arg="nocona" + core2="yes" + ;; + # Intel ia32 + *Intel*Core*|*X[eE][oO][nN]*) + # a Xeon is just another pentium4 ... + # ... unless it has the "lm" (long-mode) flag set, + # in that case it's a Xeon with EM64T support + # If SSE3 support exists it is a Core2 Duo or newer + # So is Intel Core. + if [ -z "$cpu_flag_lm" ]; then + cpu_arg="pentium4" + else + cpu_arg="nocona" + fi + if test -z "$cpu_flag_ssse3" ; then + core2="no" + else + core2="yes" + fi + ;; + *Pentium*4*Mobile*) + cpu_arg="pentium4m" + ;; + *Pentium\(R\)*\ M*) + cpu_arg="pentium-m" + low_cpu_arg="pentium3" + ;; + *Pentium\(R\)*\ D*) + cpu_arg="prescott" + ;; + *Pentium*4*) + cpu_arg="pentium4" + ;; + *Pentium*III*Mobile*) + cpu_arg="pentium3m" + ;; + *Pentium*III*) + cpu_arg="pentium3" + ;; + *Pentium*M*pro*) + cpu_arg="pentium-m" + ;; + *Celeron\(R\)*\ M*) + cpu_arg="pentium-m" + ;; + *Celeron*Coppermine*) + cpu_arg="pentium3" + ;; + *Celeron\(R\)*) + cpu_arg="pentium4" + ;; + *Celeron*) + cpu_arg="pentium2" + ;; + *Atom*) + cpu_arg="prescott" + ;; + *GenuineIntel*) + cpu_arg="pentium" + ;; + *Turion*) + cpu_arg="athlon64" + ;; + *Athlon*64*) + cpu_arg="athlon64" + ;; + *Athlon*) + cpu_arg="athlon" + ;; + *AMD-K7*) + cpu_arg="athlon" + ;; + *Athlon*XP\ *) + cpu_arg="athlon-xp" + ;; + *AMD*Sempron\(tm\)*) + cpu_arg="athlon-mp" + ;; + *AMD*Athlon\(tm\)\ 64*) + cpu_arg="k8" + ;; + *Opteron*) + cpu_arg="opteron" + ;; + *Phenom*) + cpu_arg="k8" + ;; + *AuthenticAMD*) + cpu_arg="k6" + ;; + *HygonGenuine*) + cpu_arg="k8" + ;; + *VIA\ *) + cpu_arg="i686" + ;; + # MacOSX / Intel + *i386*i486*) + cpu_arg="pentium-m" + ;; + *i386*) + cpu_arg="i386" + ;; + # Intel ia64 + *Itanium*) + cpu_arg="itanium" + ;; + *IA-64*) + cpu_arg="itanium" + ;; + # Solaris Sparc + *sparc*sun4[uv]*) + cpu_arg="sparc" + ;; + # Power PC + *ppc*) + cpu_arg="powerpc" + ;; + *powerpc*) + cpu_arg="powerpc" + ;; + # unknown + *) + cpu_arg="" + ;; + esac + + if test "x$low_cpu_arg" = "x" ; then + low_cpu_arg="$cpu_arg" + fi + + if test -z "$cpu_arg" ; then + if test "$CPUINFO" != " " ; then + # fallback to uname if necessary + TEST_CPUINFO=" " + check_cpu_cflags="" + check_cpu + return + fi + echo "BUILD/check-cpu: Oops, could not find out what kind of cpu this machine is using." >&2 + check_cpu_cflags="" + return + fi + + if test "x$compiler" = "x" ; then + check_compiler_cpu_flags + fi + + if test "x$core2" = "xyes" ; then + cpu_arg="core2" + fi + + return 0 +} + +check_cpu |