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authorAndreas Schwab <schwab@linux-m68k.org>2012-03-16 16:07:57 +0100
committerAndreas Schwab <schwab@linux-m68k.org>2012-03-21 23:58:50 +0100
commit7998fa7899a29803ad4512002636332dfee48451 (patch)
treeab1e75e83dd8478f276b2fbf87b192732f83548d /configure
parent8e95c99a7a0b0ca8cf9bfbeddf1e43fb3efc1bee (diff)
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Disable use of FMA instructions in branred
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure22
1 files changed, 22 insertions, 0 deletions
diff --git a/configure b/configure
index e131070..194c4ed 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; }
@@ -7657,6 +7678,7 @@ fi
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -fPIC is default" >&5
$as_echo_n "checking whether -fPIC is default... " >&6; }
if ${libc_cv_pic_default+:} false; then :