Sigh, I keep forgetting to attach the patch.
2016-07-11 Michael Meissner <meiss...@linux.vnet.ibm.com>
* doc/install.texi (Configuration): Document PowerPC specific
configuration options --enable-lra and --enable-float128.
* configure.ac: Add --enable-lra and --enable-float128 to turn on
-mlra and -mfloat128 by default in the PowerPC compiler.
* configure: Regenerate.
* config.gcc (powerpc*-*-linux*): Add --enable-lra and
--enable-float128 support.
* config/rs6000/rs6000.c (rs6000_option_override_internal): Add
support for --enable-lra and --enable-float128.
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.vnet.ibm.com, phone: +1 (978) 899-4797
Index: gcc/doc/install.texi
===================================================================
--- gcc/doc/install.texi (revision 238170)
+++ gcc/doc/install.texi (working copy)
@@ -1661,6 +1661,26 @@ Using the GNU Compiler Collection (GCC)}
See ``RS/6000 and PowerPC Options'' in the main manual
@end ifhtml
+@item --enable-lra
+This option enables @option{-mlra} by default for powerpc-linux.
+@ifnothtml
+@xref{RS/6000 and PowerPC Options,, RS/6000 and PowerPC Options, gcc,
+Using the GNU Compiler Collection (GCC)},
+@end ifnothtml
+@ifhtml
+See ``RS/6000 and PowerPC Options'' in the main manual
+@end ifhtml
+
+@item --enable-float128
+This option enables @option{-mfloat128} by default for powerpc-linux.
+@ifnothtml
+@xref{RS/6000 and PowerPC Options,, RS/6000 and PowerPC Options, gcc,
+Using the GNU Compiler Collection (GCC)},
+@end ifnothtml
+@ifhtml
+See ``RS/6000 and PowerPC Options'' in the main manual
+@end ifhtml
+
@item --enable-default-ssp
Turn on @option{-fstack-protector-strong} by default.
Index: gcc/configure
===================================================================
--- gcc/configure (revision 238170)
+++ gcc/configure (working copy)
@@ -918,6 +918,8 @@ enable_rpath
with_libiconv_prefix
enable_sjlj_exceptions
enable_secureplt
+enable_lra
+enable_float128
enable_leading_mingw64_underscores
enable_cld
enable_frame_pointer
@@ -1630,6 +1632,9 @@ Optional Features:
--enable-sjlj-exceptions
arrange to use setjmp/longjmp exception handling
--enable-secureplt enable -msecure-plt by default for PowerPC
+ --enable-lra enable -mlra by default for PowerPC
+ --enable-float128 enable -mfloat128 by default for PowerPC on Linux
+ VSX systems
--enable-leading-mingw64-underscores
enable leading underscores on 64 bit mingw targets
--enable-cld enable -mcld by default for 32bit x86
@@ -11984,6 +11989,18 @@ if test "${enable_secureplt+set}" = set;
fi
+# Check whether --enable-lra was given.
+if test "${enable_lra+set}" = set; then :
+ enableval=$enable_lra;
+fi
+
+
+# Check whether --enable-float128 was given.
+if test "${enable_float128+set}" = set; then :
+ enableval=$enable_float128;
+fi
+
+
# Check whether --enable-leading-mingw64-underscores was given.
if test "${enable_leading_mingw64_underscores+set}" = set; then :
enableval=$enable_leading_mingw64_underscores;
@@ -18475,7 +18492,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 18478 "configure"
+#line 18495 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -18581,7 +18598,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 18584 "configure"
+#line 18601 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
Index: gcc/configure.ac
===================================================================
--- gcc/configure.ac (revision 238170)
+++ gcc/configure.ac (working copy)
@@ -1798,6 +1798,17 @@ AC_ARG_ENABLE(secureplt,
[enable -msecure-plt by default for PowerPC])],
[], [])
+AC_ARG_ENABLE(lra,
+[AS_HELP_STRING([--enable-lra],
+ [enable -mlra by default for PowerPC])],
+[], [])
+
+AC_ARG_ENABLE(float128,
+[AS_HELP_STRING([--enable-float128],
+ [enable -mfloat128 by default for PowerPC on Linux VSX
+ systems])],
+[], [])
+
AC_ARG_ENABLE(leading-mingw64-underscores,
AS_HELP_STRING([--enable-leading-mingw64-underscores],
[enable leading underscores on 64 bit mingw targets]),
Index: gcc/config.gcc
===================================================================
--- gcc/config.gcc (revision 238170)
+++ gcc/config.gcc (working copy)
@@ -2414,6 +2414,12 @@ powerpc*-*-linux*)
if test x${enable_secureplt} = xyes; then
tm_file="rs6000/secureplt.h ${tm_file}"
fi
+ if test x${enable_lra} = xyes; then
+ tm_defines="${tm_defines} ENABLE_LRA=1"
+ fi
+ if test x${enable_float128} = xyes; then
+ tm_defines="${tm_defines} ENABLE_FLOAT128=1"
+ fi
;;
powerpc-wrs-vxworks|powerpc-wrs-vxworksae|powerpc-wrs-vxworksmils)
tm_file="${tm_file} elfos.h freebsd-spec.h rs6000/sysv4.h"
Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c (revision 238170)
+++ gcc/config/rs6000/rs6000.c (working copy)
@@ -4306,6 +4306,17 @@ rs6000_option_override_internal (bool gl
rs6000_isa_flags &= ~OPTION_MASK_P9_VECTOR;
}
+ /* Enable LRA if the compiler was configured with --enable-lra. */
+#ifdef ENABLE_LRA
+ if ((rs6000_isa_flags_explicit & OPTION_MASK_LRA) == 0)
+ {
+ if (ENABLE_LRA)
+ rs6000_isa_flags |= OPTION_MASK_LRA;
+ else
+ rs6000_isa_flags &= ~OPTION_MASK_LRA;
+ }
+#endif
+
/* There have been bugs with -mvsx-timode that don't show up with -mlra,
but do show up with -mno-lra. Given -mlra will become the default once
PR 69847 is fixed, turn off the options with problems by default if
@@ -4372,6 +4383,17 @@ rs6000_option_override_internal (bool gl
}
}
+ /* Enable FLOAT128 if the compiler was configured with --enable-float128. */
+#ifdef ENABLE_FLOAT128
+ if (TARGET_VSX && (rs6000_isa_flags_explicit & OPTION_MASK_FLOAT128) == 0)
+ {
+ if (ENABLE_FLOAT128)
+ rs6000_isa_flags |= OPTION_MASK_FLOAT128;
+ else
+ rs6000_isa_flags &= ~(OPTION_MASK_FLOAT128 | OPTION_MASK_FLOAT128_HW);
+ }
+#endif
+
/* __float128 requires VSX support. */
if (TARGET_FLOAT128 && !TARGET_VSX)
{
