source: git/m4/cpu-check.m4 @ 84b294

# Check the cpu type

dnl SING_CHECK_CPU
dnl
dnl check the cpu and define EXEC_EXT and SI_CPU*

AC_DEFUN([SING_CHECK_CPU],
[
AC_CANONICAL_HOST
AC_MSG_CHECKING(CPU for singular)

# CPUUNAME and PATH
ac_cv_singcpuname=`uname -m`
AC_MSG_RESULT($ac_cv_singcpuname)

if test "$ac_cv_singuname" = ix86-Win; then
  EXEC_EXT=".exe"
  AC_DEFINE(SI_CPU_I386,1,"ix86 under Windows")
  AC_SUBST(SI_CPU_I386)
fi
AC_SUBST(EXEC_EXT)
if test "$ac_cv_singuname" = x86_64-Linux; then
  AC_DEFINE(SI_CPU_X86_64,1,"ix86-64 under GNU/Linux")
  AC_SUBST(SI_CPU_X86_64)
fi
if test "$ac_cv_singuname" = ix86-Linux; then
  AC_DEFINE(SI_CPU_I386,1,"ix86 under GNU/Linux")
  AC_SUBST(SI_CPU_I386)
fi
if test "$ac_cv_singuname" = IA64-Linux; then
  AC_DEFINE(SI_CPU_IA64,1,"ia64 under GNU/Linux")
  AC_SUBST(SI_CPU_IA64)
fi
if test "$ac_cv_singuname" = ppc-Linux; then
  AC_DEFINE(SI_CPU_PPC,1,"PPC under GNU/Linux")
  AC_SUBST(SI_CPU_PPC)
fi
if test "$ac_cv_singuname" = ppcMac-darwin; then
  AC_DEFINE(SI_CPU_PPC,1,"PPC under MacOS")
  AC_SUBST(SI_CPU_PPC)
fi
# test again with CPU names
if test "$ac_cv_singcpuname" = i386; then
  AC_DEFINE(SI_CPU_I386,1,"i386")
  AC_SUBST(SI_CPU_I386)
fi
if test "$ac_cv_singcpuname" = i686; then
  AC_DEFINE(SI_CPU_I386,1,"i686")
  AC_SUBST(SI_CPU_I386)
fi
if test "$ac_cv_singcpuname" = x86_64; then
  AC_DEFINE(SI_CPU_X86_64,1,"x86-64")
  AC_SUBST(SI_CPU_X86_64)
fi
if test "$ac_cv_singcpuname" = ia64; then
  AC_DEFINE(SI_CPU_IA64,1,"ia64")
  AC_SUBST(SI_CPU_IA64)
fi
if test "$ac_cv_singcpuname" = sparc; then
  AC_DEFINE(SI_CPU_SPARC,1,"SPARC")
  AC_SUBST(SI_CPU_SPARC)
fi
if test "$ac_cv_singcpuname" = ppc; then
  AC_DEFINE(SI_CPU_PPC,1,"PPC")
  AC_SUBST(SI_CPU_PPC)
fi

# UNAME and PATH
AC_MSG_CHECKING(uname for Singular)

#ac_cv_singuname=`singuname.sh`
AC_MSG_RESULT($ac_cv_singuname)
if test "$ac_cv_singuname" = unknown; then
  AC_MSG_WARN(Unknown architecture: Check singuname.sh)
  ac_cv_singuname="unknown"
fi
AC_DEFINE_UNQUOTED(S_UNAME, "$ac_cv_singuname", Singular\'s own uname\, believe it or not)


AS_CASE([$host_cpu],
dnl the following settings seems to be better on i386 and x86_64 processors
  [i*86*|x86_64*], [AC_DEFINE(HAVE_MULT_MOD,1,multiplication is fast on the cpu: a*b is with mod otherwise using tables of logartihms)],
dnl the following settings seems to be better on itanium processors
dnl AC_DEFINE(HAVE_MULT_MOD,1,)
  [ia64*], [AC_DEFINE(HAVE_GENERIC_ADD,1,use branch for addition in Z/p otherwise it uses a generic add)],
dnl the following settings seems to be better on sparc processors
  [sparc*], [
            AC_DEFINE(HAVE_MULT_MOD,1,multiplication is fast on the cpu: a*b is with mod otherwise using tables of logartihms)
            AC_DEFINE(HAVE_DIV_MOD,1,division using extend euclidian algorithm otherwise using tables of logartihms)
            ],
dnl the following settings seems to be better on ppc processors
dnl testet on: ppc_Linux, 740/750 PowerMac G3, 512k L2 cache
  [powerpc*|ppc*], [AC_DEFINE(HAVE_MULT_MOD,1,multiplication is fast on the cpu: a*b is with mod otherwise using tables of logartihms)],
  []
)

])