re PR fortran/32049 (Support on x86_64 also kind=16)

/
2010-11-13  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
            Tobias Burnus  <burnus@net-b.de>

        PR fortran/32049
        * Makefile.def: Add libquadmath; build it with language=fortran.
        * configure.ac: Add libquadmath.
        * Makefile.tpl: Handle multiple libs in check-[+language+].
        * Makefile.in: Regenerate.
        * configure: Regenerate.

libquadmath/
2010-11-13  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
            Tobias Burnus  <burnus@net-b.de>

        PR fortran/32049
        Initial implementation and checkin.

gcc/fortran/
2010-11-13  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
            Tobias Burnus  <burnus@net-b.de>

        PR fortran/32049
        * gfortranspec.c (find_spec_file): New function.
        (lang_specific_driver): Try to find .spec file and use it.
        * trans-io.c (iocall): Define
        * IOCALL_X_REAL128/COMPLEX128(,write).
        (gfc_build_io_library_fndecls): Build decl for __float128 I/O.
        (transfer_expr): Call __float128 I/O functions.
        * trans-types.c (gfc_init_kinds): Allow kind-16 belonging
        to __float128.

gcc/testsuite/
2010-11-13  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
            Tobias Burnus  <burnus@net-b.de>

        PR fortran/32049
        * gfortran.dg/quad_1.f90: New.
        * lib/gcc-defs.exp (gcc-set-multilib-library-path): Use also
        compiler arguments.
        * lib/gfortran.exp (gfortran_link_flags): Add libquadmath to
        library search path; call gcc-set-multilib-library-path with
        arguments such that libgfortran.spec is found.
        (gfortran_init): Add path for libgfortran.spec to
GFORTRAN_UNDER_TEST.

libgomp/
2010-11-13  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
            Tobias Burnus  <burnus@net-b.de>

        PR fortran/32049
        * configure.ac: 
        * configure: Regenerate.

libgfortran/
2010-11-13  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
            Tobias Burnus  <burnus@net-b.de>

        PR fortran/32049
        * Makefile.am: Add missing pow_r16_i4.c, add transfer128.c,
        link libquadmath, if used.
        * acinclude.m4 (LIBGFOR_CHECK_FLOAT128): Add.
        * configure.ac: Use it, touch spec file.
        * gfortran.map: Add pow_r16_i4 and
        transfer_(real,complex)128(,write) functions.
        * intrinsics/cshift0.c (cshift0): Handle __float128 type.
        * intrinsics/erfc_scaled_inc.c: Ditto.
        * intrinsics/pack_generic.c (pack): Ditto
        * intrinsics/spread_generic.c (spread): Ditto.
        * intrinsics/unpack_generic.c (unpack1): Ditto.
        * io/read.c (convert_real): Ditto.
        * io/transfer.c: Update comments.
        * io/transfer128.c: New file.
        * io/write_float.def (write_float): Handle __float128 type.
        * libgfortran.h: #include quadmath_weak.h, define __builtin_infq
        and nanq.
        * m4/mtype.m4: Handle __float128 type.
        * runtime/in_pack_generic.c (internal_pack): Ditto.
        * runtime/in_unpack_generic.c (internal_unpack): Ditto.
        * kinds-override.h: New file.
        * libgfortran.spec.in: Ditto.
        * generated/pow_r16_i4.c: Generated.
        * Makefile.in: Regenerate.
        * configure: Regenerate.
        * config.h: Regenerate.
        * bessel_r10.c: Regenerate.
        * bessel_r16.c: Regenerate.
        * bessel_r4.c: Regenerate.
        * bessel_r8.c: Regenerate.
        * exponent_r16.c: Regenerate.
        * fraction_r16.c: Regenerate.
        * nearest_r16.c: Regenerate.
        * norm2_r10.c: Regenerate.
        * norm2_r16.c: Regenerate.
        * norm2_r4.c: Regenerate.
        * norm2_r8.c: Regenerate.
        * rrspacing_r16.c: Regenerate.
        * set_exponent_r16.c: Regenerate.
        * spacing_r16.c: Regenerate.


Co-Authored-By: Tobias Burnus <burnus@net-b.de>

From-SVN: r166825

1 files changed, 76 insertions, 0 deletions

diff --git a/libgfortran/acinclude.m4 b/libgfortran/acinclude.m4
index 09cd292..cb016f1 100644
--- a/libgfortran/acinclude.m4
+++ b/libgfortran/acinclude.m4
@@ -275,3 +275,79 @@ esac])
     AC_DEFINE(HAVE_BROKEN_POWF, 1, [Define if powf is broken.])
   fi
 ])
+
+dnl Check whether we have a __float128 type
+AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [
+  LIBQUADSPEC=
+  AC_CACHE_CHECK([whether we have a usable __float128 type],
+                 libgfor_cv_have_float128, [
+    AC_TRY_LINK([
+/* no header */
+],[
+  typedef _Complex float __attribute__((mode(TC))) __complex128;
+
+  __float128 x;
+  x = __builtin_huge_valq() - 2.e1000Q;
+
+  __complex128 z1, z2;
+  z1 = x;
+  z2 = 2.Q;
+
+  z1 /= z2;
+  z1 /= 7.Q;
+],
+    libgfor_cv_have_float128=yes,
+    libgfor_cv_have_float128=no)
+  ])
+
+  if test "x$libgfor_cv_have_float128" = xyes; then
+    AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable __float128 type.])
+
+    dnl Check whether -Wl,--as-needed is supported
+    dnl 
+    dnl Turn warnings into error to avoid testsuite breakage.  So enable
+    dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn
+    dnl it off again.  As a workaround, save and restore werror flag like
+    dnl AC_PATH_XTRA.
+    dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html
+    ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag
+    AC_CACHE_CHECK([whether --as-needed works],
+      [libgfor_cv_have_as_needed],
+      [
+      save_LDFLAGS="$LDFLAGS"
+      LDFLAGS="$LDFLAGS -Wl,--as-needed -lm -Wl,--no-as-needed"
+      libgfor_cv_have_as_needed=no
+      AC_LANG_WERROR
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
+		     [libgfor_cv_have_as_needed=yes],
+		     [libgfor_cv_have_as_needed=no])
+      LDFLAGS="$save_LDFLAGS"
+      ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
+    ])
+
+    dnl For static libgfortran linkage, depend on libquadmath only if needed.
+    if test "x$libgfor_cv_have_as_needed" = xyes; then
+      LIBQUADSPEC="%{static-libgfortran:--as-needed} -lquadmath %{static-libgfortran:--no-as-needed}"
+    else
+      LIBQUADSPEC="-lquadmath"
+    fi
+    if test -f ../libquadmath/libquadmath.la; then
+      LIBQUADLIB=../libquadmath/libquadmath.la
+      LIBQUADLIB_DEP=../libquadmath/libquadmath.la
+      LIBQUADINCLUDE='-I$(srcdir)/../libquadmath'
+    else
+      LIBQUADLIB="-lquadmath"
+      LIBQUADLIB_DEP=
+      LIBQUADINCLUDE=
+    fi
+  fi
+
+  dnl For the spec file
+  AC_SUBST(LIBQUADSPEC)
+  AC_SUBST(LIBQUADLIB)
+  AC_SUBST(LIBQUADLIB_DEP)
+  AC_SUBST(LIBQUADINCLUDE)
+
+  dnl We need a conditional for the Makefile
+  AM_CONDITIONAL(LIBGFOR_BUILD_QUAD, [test "x$libgfor_cv_have_float128" = xyes])
+])