Changeset 41dde6 in git for m4/cpu-check.m4

Timestamp:

Apr 19, 2011, 3:16:16 PM (12 years ago)

Author:

Mohamed Barakat <mohamed.barakat@…>

Branches:

(u'spielwiese', '91e5db82acc17434e4062bcfa44e6efa7d41fd30')

Children:

72b8801dbb1081f0965bc77daff3ec9da62f800a

Parents:

aa450d0e542b7d92cb13033a49556c48bed0fa0b

git-author:

Mohamed Barakat <mohamed.barakat@rwth-aachen.de>2011-04-19 15:16:16+02:00

git-committer:

Mohamed Barakat <mohamed.barakat@rwth-aachen.de>2011-11-09 12:31:19+01:00

Message:

- moved the definitions of HAVE_MULT_MOD, HAVE_DIV_MOD, and HAVE_GENERIC_ADD to cpu-check.m4
- generate misc/auxiliary.h in configure script

File:

• m4/cpu-check.m4 (modified) (2 diffs)

m4/cpu-check.m4

@@ -7 +7 @@
 AC_DEFUN([SING_CHECK_CPU],
 [
-# Checks for library functions.
+AC_CANONICAL_HOST
 AC_MSG_CHECKING(CPU for singular)
 
@@ -75 +75 @@
   ac_cv_singuname="unknown"
 fi
-AC_DEFINE_UNQUOTED(S_UNAME, "$ac_cv_singuname", Singular's own uname\, believe it or not)
+AC_DEFINE_UNQUOTED(S_UNAME, "$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)],
+  []
+)
 
 ])