2012-12-16 05:24:19 -05:00
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#!/bin/sh
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# Print the gcc cpu specific options tailored for the current CPU
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# License: LGPLv2
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# Author:
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2022-10-07 01:20:47 +03:00
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# https://www.pixelbeat.org/
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2012-12-16 05:24:19 -05:00
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# Notes:
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# This script currently supports Linux,FreeBSD,Cygwin
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# This script is x86 (32 bit) specific
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# It should work on any gcc >= 2.95 at least
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# It only returns CPU specific options. You probably also want -03 etc.
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# Changes:
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# V0.1, 12 Mar 2003, Initial release
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# V0.2, 01 Jun 2005, Added support for 3.2>=gcc<=4.0
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# V0.3, 03 Jun 2005, Added support for pentium-m
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# V0.4, 03 Jun 2005, Fix silly bugs
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# V0.5, 07 Jun 2005, Clarify/Simplify confusing floating point expr usage
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# Print warning when CPU only supported on a newer gcc
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# V0.6, 15 Dec 2006, Added support for Intel Core and Core 2 processors
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# Added support for 4.1>=gcc<=4.3
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# Added support for gcc -msse3 option
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# Added support for new gcc -march=native option
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# V0.7, 18 Dec 2006, Changes from Conor McDermottroe
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# Added support for FreeBSD
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# Remove bash specific constructs
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# Better error handling
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# V0.8, 19 Dec 2006, Give warnings and 32 bit -march on 64 bit platforms.
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# Previously it just gave an invalid blank -march.
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# Reported and tested by Ewan Oughton.
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# V0.9, 30 Apr 2007, Give error if compiler not present.
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# Warn about rather than default to -march=native option.
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# V0.92, 08 Nov 2007, Change from Krzysztof Jankowski to support Cygwin.
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# Added support for AMD family 10 processors.
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# Add support for gcc -msse4 & -msse5 options.
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# Use "prescott" rather than "pentium4" for all
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# models >= 3 in intel family 15, not just model 3.
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# V0.93, 13 Nov 2007, Oops, actually not all intel family 15, model >= 3
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# are prescotts. Use the sse3 flag to distinguish.
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# V0.94, 31 Dec 2007, Oops, actually all intel family 15, model >= 3
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# are prescotts. This was indicated by Adam Drzewiecki.
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# I was confused by a bug in older linux kernels where pni
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# was not reported for my intel "F41" processor at least.
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# V0.95, 18 Jan 2008, Changes from Conor McDermottroe
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# Support for Mac OS X
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# Support for FreeBSD base system
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# V0.96, 17 Dec 2008, Following a report from Alfredo Pons, add support
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# for newer intel core2 processors (models 23,26,29,...)
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# by assuming models >= 15 are core2.
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# Report details of unrecognised CPUs.
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# V0.97, 19 Dec 2008, Use prescott for Intel Atom (model 28).
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# Ensure all errors are output to stderr.
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# V0.98, 24 Feb 2009, Actually Intel Atom (model 28) is core2 ISA compliant.
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# It's an in-order core (like i586) so mtune as such.
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# V0.99, 30 Apr 2009, Intel Atom (model 28) is getting a corresponding "atom"
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# option in GCC 4.5
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# V0.99.3, 11 Aug 2009, Support for AMD Geode LX processor.
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# V0.99.4, 24 Oct 2009, Following a report from Maxime de Roucy, add support
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# for AMD family 17 (griffin).
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2013-07-05 10:16:34 -04:00
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# V0.99.11, 04 Jul 2013
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2022-10-07 01:20:47 +03:00
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# https://github.com/pixelb/scripts/commits/master/scripts/gcccpuopt
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2012-12-16 05:24:19 -05:00
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if [ "$1" = "--version" ]; then
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2013-07-05 10:16:34 -04:00
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echo "0.99.11" && exit
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2012-12-16 05:24:19 -05:00
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fi
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# This table shows when -march options were introduced into _official_ gcc releases.
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# Note there are vendor deviations that complicate this.
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# For e.g. Red Hat introduced the prescott option in 3.3-13.
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# gcc-2.95 = i386, i486, i586,pentium, i686,pentiumpro, k6
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# gcc-3.0 += athlon
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# gcc-3.1 += pentium-mmx, pentium2, pentium3, pentium4, k6-2, k6-3, athlon-{tbird, 4,xp,mp}
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# gcc-3.3 += winchip-c6, winchip2, c3
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# gcc-3.4.0 += k8,opteron,athlon64,athlon-fx, c3-2
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# gcc-3.4.1 += pentium-m, pentium3m, pentium4m, prescott, nocona
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# gcc-4.3 += core2, amdfam10, geode
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# gcc-4.5 += atom
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# gcc-4.6 += corei7, corei7-avx, bdver1, btver1
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# gcc-4.7 += core-avx-i, core-avx2, bdver2
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# gcc-4.8 += btver2
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[ -z "$CC" ] && CC=gcc
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try_gcc_options() {
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$CC $* -S -o /dev/null -xc /dev/null >/dev/null 2>&1
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}
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if ! try_gcc_options; then
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echo "Error: Couldn't execute your compiler ($CC)" >&2
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exit 1
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fi
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2013-07-05 10:16:34 -04:00
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if try_gcc_options -march=native; then
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echo "Warning: Your compiler supports the -march=native option which you may prefer" >&2
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2014-03-15 17:11:57 -06:00
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gcc -march=native --verbose -xc /dev/null 2>&1 | sed -n 's|.*/dev/null \(-march.*-mtune[^ ]*\).*|\1|p' >&2
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2013-07-05 10:16:34 -04:00
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fi
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2012-12-16 05:24:19 -05:00
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2013-07-22 11:29:16 -05:00
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#if ! try_gcc_options -march=i386; then
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# if ! try_gcc_options -m32 -march=i386; then
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# echo "Error: This script only supports 32 bit x86 architectures" >&2
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# exit 1
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# else
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# echo "Warning: The optimum *32 bit* architecture is reported" >&2
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# m32="-m32 "
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# fi
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#fi
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2012-12-16 05:24:19 -05:00
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2013-07-22 11:29:16 -05:00
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#try_line() {
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# skip=0
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# for arch in $1; do
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# if try_gcc_options $m32 -march=$arch; then
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# echo $arch
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# return
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# elif [ "$skip" = "0" ] && [ "$arch" != "native" ]; then
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# skip=1
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# echo "Warning: Newer versions of GCC better support your CPU with -march=$arch" >&2
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# fi
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# done
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# return 1
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#}
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2012-12-16 05:24:19 -05:00
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read_cpu_data_linux() {
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IFS=":"
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while read name value; do
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unset IFS
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name=`echo $name` #strip spaces
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value=`echo $value` #strip spaces
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if [ "$name" = "vendor_id" ]; then
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value=`echo $value | sed 's/\([^ ]*\).*/\1/'` #take first word
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fi
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IFS=":"
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if [ "$name" = "vendor_id" ]; then
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vendor_id="$value"
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elif [ "$name" = "cpu family" ]; then
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cpu_family="$value"
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elif [ "$name" = "model" ]; then
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cpu_model="$value"
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elif [ "$name" = "flags" ]; then
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flags="$value"
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break #flags last so break early
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fi
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done < /proc/cpuinfo
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unset IFS
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}
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read_cpu_data_freebsd() {
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local _line _cpu_id
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if [ ! -r /var/run/dmesg.boot ]; then
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echo "Error: /var/run/dmesg.boot does not exist!" >&2
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exit 1;
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fi
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IFS="
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"
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for _line in `grep -A2 '^CPU: ' /var/run/dmesg.boot`; do
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if [ -n "`echo $_line | grep '^ Origin = '`" ]; then
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vendor_id="`echo $_line | sed -e 's/^ Origin = .//' -e 's/[^A-Za-z0-9].*$//'`"
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_cpu_id="`echo $_line | sed -e 's/^.*Id = //' -e 's/ .*$//' -e 'y/abcdef/ABCDEF/'`"
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cpu_family=$(( ($_cpu_id & 0xF0F) >> 8 )) #FreeBSD 5.0 sh doesn't support 0x
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cpu_model=$(( (($_cpu_id & 0xF0) >> 4) + (($_cpu_id & 0xF0000) >> 12) ))
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fi
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if [ -n "`echo $_line | grep '^ Features='`" ]; then
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flags="`echo $_line | sed -e 's/^.*<//' -e 's/>.*//' -e 's/,/ /g' | tr 'A-Z' 'a-z'`"
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fi
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done
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unset IFS
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}
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read_cpu_data_darwin() {
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vendor_id="`/usr/sbin/sysctl -n machdep.cpu.vendor`"
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cpu_family="`/usr/sbin/sysctl -n machdep.cpu.family`"
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cpu_model="`/usr/sbin/sysctl -n machdep.cpu.model`"
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flags="`/usr/sbin/sysctl -n machdep.cpu.features | tr 'A-Z' 'a-z'`"
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}
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read_cpu_data() {
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# Default values
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vendor_id="NotFound"
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cpu_family="-1"
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cpu_model="-1"
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flags=""
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case "$(uname)" in
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Linux|CYGWIN*)
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read_cpu_data_linux ;;
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FreeBSD)
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read_cpu_data_freebsd ;;
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Darwin)
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read_cpu_data_darwin ;;
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*)
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echo "Error: $(uname) is not a supported operating system" >&2
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exit 1 ;;
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esac
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}
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read_cpu_data
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if [ "$vendor_id" = "AuthenticAMD" ]; then
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if [ $cpu_family -eq 4 ]; then
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_CFLAGS="-march=i486"
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elif [ $cpu_family -eq 5 ]; then
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if [ $cpu_model -lt 4 ]; then
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_CFLAGS="-march=pentium"
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elif [ \( $cpu_model -eq 6 \) -o \( $cpu_model -eq 7 \) ]; then
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_CFLAGS="-march=k6"
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elif [ \( $cpu_model -eq 8 \) -o \( $cpu_model -eq 12 \) ]; then
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line="k6-2 k6"
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elif [ \( $cpu_model -eq 9 \) -o \( $cpu_model -eq 13 \) ]; then
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line="k6-3 k6-2 k6"
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elif [ $cpu_model -eq 10 ]; then #geode LX
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line="geode k6-2 k6"
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#The LX supports 3dnowext in addition to the k6-2 instructions,
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#however gcc doesn't support explicitly selecting that.
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fi
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elif [ $cpu_family -eq 6 ]; then
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if [ $cpu_model -le 3 ]; then
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line="athlon k6-3 k6-2 k6"
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elif [ $cpu_model -eq 4 ]; then
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line="athlon-tbird athlon k6-3 k6-2 k6"
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elif [ $cpu_model -ge 6 ]; then #athlon-{4,xp,mp} (also geode NX)
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line="athlon-4 athlon k6-3 k6-2 k6"
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fi
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elif [ $cpu_family -eq 15 ]; then #k8,opteron,athlon64,athlon-fx
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line="k8 athlon-4 athlon k6-3 k6-2 k6"
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elif [ $cpu_family -eq 16 ] || #barcelona,amdfam10
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[ $cpu_family -eq 17 ] || #griffin
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[ $cpu_family -eq 18 ]; then #llano
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line="amdfam10 k8 athlon-4 athlon k6-3 k6-2 k6"
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elif [ $cpu_family -eq 20 ]; then #bobcat
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line="btver1 amdfam10 k8 athlon-4 athlon k6-3 k6-2 k6"
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elif [ $cpu_family -eq 21 ]; then #bulldozer
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if echo "$flags" | grep -q bmi; then #piledriver
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line="bdver2 bdver1 btver1 amdfam10 k8 athlon-4 athlon k6-3 k6-2 k6"
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else
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line="bdver1 btver1 amdfam10 k8 athlon-4 athlon k6-3 k6-2 k6"
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fi
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elif [ $cpu_family -eq 22 ]; then #jaguar
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line="btver2 btver1 amdfam10 k8 athlon-4 athlon k6-3 k6-2 k6"
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fi
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elif [ "$vendor_id" = "CentaurHauls" ]; then
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if [ $cpu_family -eq 5 ]; then
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if [ $cpu_model -eq 4 ]; then
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line="winchip-c6 pentium"
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elif [ $cpu_model -eq 8 ]; then
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line="winchip2 winchip-c6 pentium"
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elif [ $cpu_model -ge 9 ]; then
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line="winchip2 winchip-c6 pentium" #actually winchip3 but gcc doesn't support this currently
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fi
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elif [ $cpu_family -eq 6 ]; then
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if echo "$flags" | grep -q cmov; then
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fallback=pentiumpro
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else
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fallback=pentium #gcc incorrectly assumes i686 always has cmov
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fi
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if [ $cpu_model -eq 6 ]; then
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_CFLAGS="-march=pentium" # ? Cyrix 3 (samuel)
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elif [ $cpu_model -eq 7 ] || [ $cpu_model -eq 8 ]; then
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line="c3 winchip2 winchip-c6 $fallback"
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elif [ $cpu_model -ge 9 ]; then
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line="c3-2 c3 winchip2 winchip-c6 $fallback"
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fi
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fi
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elif [ "$vendor_id" = "GenuineIntel" ]; then
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if [ $cpu_family -eq 3 ]; then
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_CFLAGS="-march=i386"
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elif [ $cpu_family -eq 4 ]; then
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_CFLAGS="-march=i486"
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elif [ $cpu_family -eq 5 ]; then
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if [ $cpu_model -ne 4 ]; then
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_CFLAGS="-march=pentium"
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else
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line="pentium-mmx pentium" #No overlap with other vendors
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fi
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elif [ $cpu_family -eq 6 ]; then
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if [ \( $cpu_model -eq 0 \) -o \( $cpu_model -eq 1 \) ]; then
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_CFLAGS="-march=pentiumpro"
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2013-07-05 10:16:34 -04:00
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elif [ \( $cpu_model -ge 2 \) -a \( $cpu_model -le 6 \) ]; then #4=TM5600 at least
|
2012-12-16 05:24:19 -05:00
|
|
|
line="pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
2013-07-05 10:16:34 -04:00
|
|
|
if [ \( $cpu_model -eq 2 \) ]; then #qemu generic
|
|
|
|
|
echo "\
|
|
|
|
|
Warning: Unspecified QEMU CPU model.
|
|
|
|
|
Please consider upgrading QEMU or configuring it to use a specific model." >&2
|
|
|
|
|
fi
|
2012-12-16 05:24:19 -05:00
|
|
|
elif [ \( $cpu_model -eq 9 \) -o \( $cpu_model -eq 13 \) ]; then #centrino
|
|
|
|
|
line="pentium-m pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
|
|
|
|
elif [ \( $cpu_model -eq 14 \) ]; then #Core
|
|
|
|
|
line="prescott pentium-m pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
|
|
|
|
elif [ $cpu_model -eq 28 ] || # pine
|
|
|
|
|
[ $cpu_model -eq 38 ] || # oak
|
|
|
|
|
[ $cpu_model -eq 54 ]; then # cedar
|
|
|
|
|
line="atom core2 pentium-m pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
|
|
|
|
elif [ $cpu_model -eq 26 ] ||
|
|
|
|
|
[ $cpu_model -eq 30 ] ||
|
|
|
|
|
[ $cpu_model -eq 31 ] ||
|
|
|
|
|
[ $cpu_model -eq 46 ] ||
|
|
|
|
|
# ^ Nehalem ^
|
|
|
|
|
[ $cpu_model -eq 37 ] ||
|
|
|
|
|
[ $cpu_model -eq 44 ] ||
|
|
|
|
|
[ $cpu_model -eq 47 ]; then
|
|
|
|
|
# ^ Westmere ^
|
|
|
|
|
line="corei7 core2 pentium-m pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
|
|
|
|
elif [ $cpu_model -eq 42 ] || #Sandy Bridge
|
|
|
|
|
[ $cpu_model -eq 45 ]; then #Sandy Bridge E
|
|
|
|
|
line="corei7-avx corei7 core2 pentium-m pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
|
|
|
|
elif [ $cpu_model -eq 58 ]; then #Ivy Bridge
|
|
|
|
|
line="core-avx-i corei7-avx corei7 core2 pentium-m pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
|
|
|
|
elif [ $cpu_model -eq 60 ]; then #Haswell
|
|
|
|
|
line="core-avx2 core-avx-i corei7-avx corei7 core2 pentium-m pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
2014-03-15 14:19:36 -06:00
|
|
|
elif [ $cpu_model -eq 69 ]; then #Haswell/Lynnfield/Clarkdale/Sandy Bridge
|
|
|
|
|
line="core-avx2 core-avx-i core2 pentium-m pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
2012-12-16 05:24:19 -05:00
|
|
|
elif [ $cpu_model -eq 15 ] ||
|
|
|
|
|
# ^ Merom ^
|
|
|
|
|
[ $cpu_model -eq 22 ] ||
|
|
|
|
|
# ^ Conroe-L ^
|
|
|
|
|
[ $cpu_model -eq 23 ] ||
|
|
|
|
|
[ $cpu_model -eq 29 ]; then
|
|
|
|
|
# ^ Penryn ^
|
|
|
|
|
line="core2 pentium-m pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
|
|
|
|
elif [ \( $cpu_model -ge 7 \) -a \( $cpu_model -le 11 \) ]; then
|
|
|
|
|
line="pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
|
|
|
|
fi
|
|
|
|
|
elif [ $cpu_family -eq 15 ]; then
|
|
|
|
|
line="pentium4 pentium3 pentium2 pentiumpro pentium-mmx pentium i486 i386"
|
|
|
|
|
if [ $cpu_model -ge 3 ]; then
|
|
|
|
|
line="prescott $line"
|
|
|
|
|
fi
|
|
|
|
|
fi
|
|
|
|
|
elif [ "$vendor_id" = "Geode" ]; then #by NSC
|
|
|
|
|
if [ $cpu_family -eq 5 ]; then
|
|
|
|
|
if [ \( $cpu_model -eq 4 \) -o \( $cpu_model -eq 9 \) ]; then
|
|
|
|
|
# Note both models 4 and 9 have cmov.
|
|
|
|
|
# In addition, model 9 has cxmmx.
|
|
|
|
|
# Note also, the "geode" gcc arch is for newer AMD geode cores
|
|
|
|
|
# and is not appropriate for this older core.
|
|
|
|
|
line="pentium-mmx pentium"
|
|
|
|
|
fi
|
|
|
|
|
fi
|
|
|
|
|
fi
|
|
|
|
|
|
|
|
|
|
if [ \( -z "$_CFLAGS" \) -a \( -z "$line" \) ]; then
|
|
|
|
|
echo "\
|
|
|
|
|
Unrecognised CPU. Please email the following to: P@draigBrady.com
|
|
|
|
|
Vendor:$vendor_id family:$cpu_family model:$cpu_model
|
|
|
|
|
flags:$flags" >&2
|
|
|
|
|
exit 1
|
|
|
|
|
fi
|
|
|
|
|
|
2013-07-22 11:29:16 -05:00
|
|
|
#[ -z "$_CFLAGS" ] && _CFLAGS="-march=`try_line "$line"`"
|
2012-12-16 05:24:19 -05:00
|
|
|
|
|
|
|
|
#The Atom CPU supports the full core2 instruction set,
|
|
|
|
|
#but it's an in-order core, the last one of those being the i586.
|
|
|
|
|
#Therefore if gcc hasn't explicit support for the Atom,
|
|
|
|
|
#tune it for the i586 architecture.
|
|
|
|
|
if ! echo "$_CFLAGS" | grep -q "atom"; then #gcc hasn't specific Atom support
|
|
|
|
|
if echo "$line" | grep -q "core2"; then #atom ISA line
|
|
|
|
|
if [ $cpu_model -eq 28 ]; then #atom
|
|
|
|
|
if echo "$_CFLAGS" | grep -E -q "(core2|pentium[^ ])"; then #gcc chose out of order arch
|
|
|
|
|
_CFLAGS="$_CFLAGS -mtune=pentium" #tune for last in-order core
|
|
|
|
|
fi
|
|
|
|
|
fi
|
|
|
|
|
fi
|
|
|
|
|
fi
|
|
|
|
|
|
|
|
|
|
#SSE is not used for floating point by default in gcc 32 bit
|
|
|
|
|
#so turn that on here.
|
2013-07-22 11:29:16 -05:00
|
|
|
#if echo "$flags" | grep -q "sse"; then
|
|
|
|
|
# if try_gcc_options "-mfpmath=sse"; then #gcc >= 3.1
|
|
|
|
|
# _CFLAGS="$_CFLAGS -mfpmath=sse"
|
|
|
|
|
# fi
|
|
|
|
|
#fi
|
2012-12-16 05:24:19 -05:00
|
|
|
|
|
|
|
|
#The SSE options are mostly selected automatically
|
|
|
|
|
#when a particular march option is selected.
|
|
|
|
|
#There are a few exceptions unfortunately, which we handle here.
|
|
|
|
|
#Note the sse instruction lines are:
|
|
|
|
|
# intel: [sse4.2] [sse4.1] ssse3 sse3 sse2 sse ...
|
|
|
|
|
# amd: [sse5] sse4a [sse3] sse2 sse ...
|
|
|
|
|
# The bracketed ones are only available on some cpus
|
|
|
|
|
# in a particular family and so need to be added explicitly.
|
2013-07-22 11:29:16 -05:00
|
|
|
#if echo "$_CFLAGS" | grep -q "amdfam10"; then
|
|
|
|
|
# if echo "$flags" | grep -q "sse5"; then
|
|
|
|
|
# if try_gcc_options "-msse5"; then #gcc >= 4.3
|
|
|
|
|
# _CFLAGS="$_CFLAGS -msse5"
|
|
|
|
|
# fi
|
|
|
|
|
# fi
|
|
|
|
|
#elif echo "$_CFLAGS" | grep -E -q "(k8|c3-2)"; then
|
|
|
|
|
# if echo "$flags" | grep -E -q "(sse3|pni)"; then
|
|
|
|
|
# if try_gcc_options "-msse3"; then #gcc >= 3.3.3
|
|
|
|
|
# _CFLAGS="$_CFLAGS -msse3"
|
|
|
|
|
# fi
|
|
|
|
|
# fi
|
|
|
|
|
#elif echo "$_CFLAGS" | grep -q "core2"; then
|
|
|
|
|
# if echo "$flags" | grep -q "sse4_2"; then
|
|
|
|
|
# if try_gcc_options "-msse4"; then #gcc >= 4.3
|
|
|
|
|
# _CFLAGS="$_CFLAGS -msse4"
|
|
|
|
|
# fi
|
|
|
|
|
# elif echo "$flags" | grep -q "sse4_1"; then
|
|
|
|
|
# if try_gcc_options "-msse4.1"; then #gcc >= 4.3
|
|
|
|
|
# _CFLAGS="$_CFLAGS -msse4.1"
|
|
|
|
|
# fi
|
|
|
|
|
# fi
|
|
|
|
|
#fi
|
2012-12-16 05:24:19 -05:00
|
|
|
|
2013-07-22 11:29:16 -05:00
|
|
|
echo "$_CFLAGS"
|
