From 7998fa7899a29803ad4512002636332dfee48451 Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@linux-m68k.org>
Date: Fri, 16 Mar 2012 16:07:57 +0100
Subject: Disable use of FMA instructions in branred

---
 configure | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'configure')

diff --git a/configure b/configure
index e131070718..194c4ed984 100755
--- a/configure
+++ b/configure
@@ -618,6 +618,7 @@ ldd_rewrite_script
 use_ldconfig
 libc_cv_sparc_as_vis3
 libc_cv_as_i686
+libc_cv_cc_nofma
 libc_cv_cc_fma4
 libc_cv_cc_novzeroupper
 libc_cv_cc_sse2avx
@@ -7035,6 +7036,26 @@ if test "$libc_cv_gcc_tls_model_attr" = no; then
   as_fn_error $? "support for the tls_model attribute is required" "$LINENO" 5
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler option to disable generation of FMA instructions" >&5
+$as_echo_n "checking for compiler option to disable generation of FMA instructions... " >&6; }
+if ${libc_cv_cc_nofma+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  libc_cv_cc_nofma=
+for opt in -ffp-contract=off -mno-fused-madd; do
+  if { ac_try='${CC-cc} $opt -xc /dev/null -S -o /dev/null'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
+  libc_cv_cc_nofma=$opt; break
+fi
+done
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_nofma" >&5
+$as_echo "$libc_cv_cc_nofma" >&6; }
+
 if test -n "$submachine"; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler option for CPU variant" >&5
 $as_echo_n "checking for compiler option for CPU variant... " >&6; }
@@ -7655,6 +7676,7 @@ fi
 
 
 
+
 
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -fPIC is default" >&5
-- 
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