configure.in: Check if the assembler supports ".balign" and ".p2align" and define...

        * configure.in: Check if the assembler supports ".balign" and
        ".p2align" and define HAVE_GAS_BALIGN_AND_P2ALIGN appropriately.
        * acconfig.h (HAVE_GAS_BALIGN_AND_P2ALIGN): New tag.
        * i386/gas.h (ASM_OUTPUT_ALIGN): If the assembler has support for
        ".balign" then use it.

From-SVN: r21023

5 files changed, 44 insertions, 1 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a9a3f84..bc58a67 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,11 @@
 Wed Jul  8 21:43:14 1998  Jeffrey A Law  (law@cygnus.com)
 
+	* configure.in: Check if the assembler supports ".balign" and
+	".p2align" and define HAVE_GAS_BALIGN_AND_P2ALIGN appropriately.
+	* acconfig.h (HAVE_GAS_BALIGN_AND_P2ALIGN): New tag.
+	* i386/gas.h (ASM_OUTPUT_ALIGN): If the assembler has support for
+	".balign" then use it.
+
 	* print-rtl.c (print_rtx): Revert previous patch.
 
 	* jump.c (duplicate_loop_exit_test): Do not duplicate the loop exit
diff --git a/gcc/acconfig.h b/gcc/acconfig.h
index 7c1523f..e1ac384 100644
--- a/gcc/acconfig.h
+++ b/gcc/acconfig.h
@@ -14,6 +14,9 @@
    of bytes to skip when using the GAS .p2align command. */
 #undef HAVE_GAS_MAX_SKIP_P2ALIGN
 
+/* Define if your assembler supports .balign and .p2align.  */
+#undef HAVE_GAS_BALIGN_AND_P2ALIGN
+
 /* Define if you have a working <inttypes.h> header file.  */
 #undef HAVE_INTTYPES_H
 
diff --git a/gcc/config/i386/gas.h b/gcc/config/i386/gas.h
index 2da338a..52c5cc4 100644
--- a/gcc/config/i386/gas.h
+++ b/gcc/config/i386/gas.h
@@ -80,7 +80,7 @@ Boston, MA 02111-1307, USA.  */
    doubt or guess work, and since this file is used for both a.out and other
    file formats, we use one of them.  */
 
-#if 0 /* ??? However, not every port uses binutils 2.6 yet.  */
+#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN 
 #undef ASM_OUTPUT_ALIGN
 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
   if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
diff --git a/gcc/configure b/gcc/configure
index 654ec63..9e59376 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -5237,6 +5237,15 @@ elif [ -f $srcdir/../gas/configure.in ]; then
 	done
 	gcc_cv_gas_major_version=`expr "$gcc_cv_gas_version" : "VERSION=\([0-9]*\)"`
 	gcc_cv_gas_minor_version=`expr "$gcc_cv_gas_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
+	# Gas version 2.6 and later support for .balign and .p2align.
+	# bytes to skip when using .p2align.
+	if [ "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 6 -o "$gcc_cv_gas_major_version" -gt 2 ]; then
+		gcc_cv_as_alignment_features=".balign and .p2align"
+		cat >> confdefs.h <<\EOF
+#define HAVE_GAS_BALIGN_AND_P2ALIGN 1
+EOF
+
+	fi
 	# Gas version 2.8 and later support specifying the maximum
 	# bytes to skip when using .p2align.
 	if [ "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 8 -o "$gcc_cv_gas_major_version" -gt 2 ]; then
@@ -5251,6 +5260,17 @@ elif [ x$host = x$target ]; then
 	gcc_cv_as=as$host_exeext
 fi
 if [ x$gcc_cv_as != x ]; then
+	# Check if we have .balign and .p2align
+	echo ".balign  4" > conftest.s
+	echo ".p2align  2" >> conftest.s
+	if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
+		gcc_cv_as_alignment_features=".balign and .p2align"
+		cat >> confdefs.h <<\EOF
+#define HAVE_GAS_BALIGN_AND_P2ALIGN 1
+EOF
+
+	fi
+	rm -f conftest.s conftest.o
 	# Check if specifying the maximum bytes to skip when
 	# using .p2align is supported.
 	echo ".p2align 4,,7" > conftest.s
diff --git a/gcc/configure.in b/gcc/configure.in
index 1714963..097ca9e 100644
--- a/gcc/configure.in
+++ b/gcc/configure.in
@@ -3332,6 +3332,12 @@ elif [[ -f $srcdir/../gas/configure.in ]]; then
 	done
 	gcc_cv_gas_major_version=`expr "$gcc_cv_gas_version" : "VERSION=\([[0-9]]*\)"`
 	gcc_cv_gas_minor_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.\([[0-9]]*\)"`
+	# Gas version 2.6 and later support for .balign and .p2align.
+	# bytes to skip when using .p2align.
+	if [[ "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 6 -o "$gcc_cv_gas_major_version" -gt 2 ]]; then
+		gcc_cv_as_alignment_features=".balign and .p2align"
+		AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN)
+	fi
 	# Gas version 2.8 and later support specifying the maximum
 	# bytes to skip when using .p2align.
 	if [[ "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 8 -o "$gcc_cv_gas_major_version" -gt 2 ]]; then
@@ -3343,6 +3349,14 @@ elif [[ x$host = x$target ]]; then
 	gcc_cv_as=as$host_exeext
 fi
 if [[ x$gcc_cv_as != x ]]; then
+	# Check if we have .balign and .p2align
+	echo ".balign  4" > conftest.s
+	echo ".p2align  2" >> conftest.s
+	if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
+		gcc_cv_as_alignment_features=".balign and .p2align"
+		AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN)
+	fi
+	rm -f conftest.s conftest.o
 	# Check if specifying the maximum bytes to skip when
 	# using .p2align is supported.
 	echo ".p2align 4,,7" > conftest.s