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diff --git a/m4/cpu-check.m4 b/m4/cpu-check.m4
index 3cf0a7f08..12bb926ac 100644
--- a/m4/cpu-check.m4
+++ b/m4/cpu-check.m4
@@ -37,6 +37,18 @@ if test "$ac_cv_singcpuname" = ppc; then
AC_DEFINE(SI_CPU_PPC,1,"PPC")
AC_SUBST(SI_CPU_PPC)
fi
+if test "$ac_cv_singcpuname" = arm -o "$ac_cv_singcpuname" = armel; then
+ AC_DEFINE(SI_CPU_ARM,1,"ARM")
+ AC_SUBST(SI_CPU_ARM)
+fi
+if test "$ac_cv_singcpuname" = aarch64; then
+ AC_DEFINE(SI_CPU_AARCH64,1,"AARCH64")
+ AC_SUBST(SI_CPU_AARCH64)
+fi
+if test "$ac_cv_singcpuname" = s390; then
+ AC_DEFINE(SI_CPU_S390,1,"S390")
+ AC_SUBST(SI_CPU_S390)
+fi
# UNAME and PATH
AC_MSG_CHECKING(uname for Singular)
@@ -65,6 +77,14 @@ dnl testet on: ppc_Linux, 740/750 PowerMac G3, 512k L2 cache
[powerpc*|ppc*], [AC_DEFINE(HAVE_GENERIC_MULT,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 arm processors
[arm*], [],
+dnl FIXME: need to run some tests
+ [aarch64*], [
+ 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_GENERIC_ADD,1,use branch for addition in Z/p otherwise it uses a generic add)
+ AC_DEFINE(HAVE_DIV_MOD,1,division using extend euclidian algorithm otherwise using tables of logartihms)
+ ],
+dnl FIXME: need to run some tests
+ [s390*], [AC_DEFINE(HAVE_GENERIC_ADD,1,use branch for addition in Z/p otherwise it uses a generic add)],
[]
)
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