path: root/meta-linaro-toolchain/recipes-devtools/gcc/gcc-arm-8.3/0034-libgcc-Add-knob-to-use-ldbl-128-on-ppc.patch

From faf35e26740461fe1a1da5433d5a0169a663e3b5 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 29 Apr 2016 20:03:28 +0000
Subject: [PATCH 34/39] libgcc: Add knob to use ldbl-128 on ppc

musl does not support ldbl 128 so we can not assume
that linux as a whole supports ldbl-128 bits, instead
act upon configure option passed to gcc and assume no
on musl and yes otherwise if no option is passed since
default behaviour is to assume ldbl128 it does not
change the defaults

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
Upstream-Status: Pending

 libgcc/Makefile.in           |  1 +
 libgcc/config/rs6000/t-linux |  5 ++++-
 libgcc/configure             | 18 ++++++++++++++++++
 libgcc/configure.ac          | 12 ++++++++++++
 4 files changed, 35 insertions(+), 1 deletion(-)
 mode change 100644 => 100755 libgcc/configure

diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index dd8cee99fd3..b5f478af382 100644
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -48,6 +48,7 @@ unwind_header = @unwind_header@
 md_unwind_header = @md_unwind_header@
 sfp_machine_header = @sfp_machine_header@
 thread_header = @thread_header@
+with_ldbl128 = @with_ldbl128@
 
 host_noncanonical = @host_noncanonical@
 real_host_noncanonical = @real_host_noncanonical@
diff --git a/libgcc/config/rs6000/t-linux b/libgcc/config/rs6000/t-linux
index 4f6d4c4a4d2..c50dd94a2da 100644
--- a/libgcc/config/rs6000/t-linux
+++ b/libgcc/config/rs6000/t-linux
@@ -1,3 +1,9 @@
 SHLIB_MAPFILES += $(srcdir)/config/rs6000/libgcc-glibc.ver
 
-HOST_LIBGCC2_CFLAGS += -mlong-double-128 -mno-minimal-toc
+ifeq ($(with_ldbl128),yes)
+HOST_LIBGCC2_CFLAGS += -mlong-double-128
+else
+# We do not want to build ibm-ldouble.c.
+LIB2ADD := $(filter-out %ibm-ldouble.c, $(LIB2ADD))
+endif
+HOST_LIBGCC2_CFLAGS += -mno-minimal-toc
diff --git a/libgcc/config/rs6000/fixtfdi.c b/libgcc/config/rs6000/fixtfdi.c
--- a/libgcc/config/rs6000/fixtfdi.c	1969-12-31 19:00:00.000000000 -0500
+++ b/libgcc/config/rs6000/fixtfdi.c	2018-12-12 17:54:50.110755540 -0500
@@ -0,0 +1,42 @@
+/* Software floating-point emulation.
+   Convert a to 64bit signed integer
+   Copyright (C) 1997-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson (rth@cygnus.com) and
+		  Jakub Jelinek (jj@ultra.linux.cz).
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file into
+   combinations with other programs, and to distribute those
+   combinations without any restriction coming from the use of this
+   file.  (The Lesser General Public License restrictions do apply in
+   other respects; for example, they cover modification of the file,
+   and distribution when not linked into a combine executable.)
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef _ARCH_PPC64
+#include "soft-fp.h"
+#include "quad-float128.h"
+
+DItype
+__fixtfdi (TFtype a)
+{
+  if (a < 0)
+    return - __fixunstfdi (-a);
+  return __fixunstfdi (a);
+}
+#endif
diff --git a/libgcc/config/rs6000/fixunstfdi.c b/libgcc/config/rs6000/fixunstfdi.c
--- a/libgcc/config/rs6000/fixunstfdi.c	1969-12-31 19:00:00.000000000 -0500
+++ b/libgcc/config/rs6000/fixunstfdi.c	2018-12-12 17:56:06.141654537 -0500
@@ -0,0 +1,58 @@
+/* Software floating-point emulation.
+   Convert a to 64bit unsigned integer
+   Copyright (C) 1997-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson (rth@cygnus.com) and
+		  Jakub Jelinek (jj@ultra.linux.cz).
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file into
+   combinations with other programs, and to distribute those
+   combinations without any restriction coming from the use of this
+   file.  (The Lesser General Public License restrictions do apply in
+   other respects; for example, they cover modification of the file,
+   and distribution when not linked into a combine executable.)
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef _ARCH_PPC64
+#include "soft-fp.h"
+#include "quad-float128.h"
+
+DItype
+__fixunstfdi (TFtype a)
+{
+  if (a < 0)
+    return 0;
+
+  /* Compute high word of result, as a flonum.  */
+  const TFtype b = (a / (((UDItype) 1) << (sizeof (SItype) * 8)));
+  /* Convert that to fixed (but not to DItype!),
+     and shift it into the high word.  */
+  UDItype v = (USItype) b;
+  v <<= (sizeof (SItype) * 8);
+  /* Remove high part from the TFtype, leaving the low part as flonum.  */
+  a -= (TFtype) v;
+  /* Convert that to fixed (but not to DItype!) and add it in.
+     Sometimes A comes out negative.  This is significant, since
+     A has more bits than a long int does.  */
+  if (a < 0)
+    v -= (USItype) (-a);
+  else
+    v += (USItype) a;
+  return v;
+}
+#endif
diff --git a/libgcc/config/rs6000/floatditf.c b/libgcc/config/rs6000/floatditf.c
--- a/libgcc/config/rs6000/floatditf.c	1969-12-31 19:00:00.000000000 -0500
+++ b/libgcc/config/rs6000/floatditf.c	2018-12-12 17:57:55.852953553 -0500
@@ -0,0 +1,47 @@
+/* Software floating-point emulation.
+   Convert a 64bit signed integer to IEEE quad
+   Copyright (C) 1997-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson (rth@cygnus.com) and
+		  Jakub Jelinek (jj@ultra.linux.cz).
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file into
+   combinations with other programs, and to distribute those
+   combinations without any restriction coming from the use of this
+   file.  (The Lesser General Public License restrictions do apply in
+   other respects; for example, they cover modification of the file,
+   and distribution when not linked into a combine executable.)
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef _ARCH_PPC64
+#include "soft-fp.h"
+#include "double.h"
+#include "quad-float128.h"
+
+TFtype
+__floatditf (DItype u)
+{
+  DFtype dh, dl;
+
+  dh = (SItype) (u >> (sizeof (SItype) * 8));
+  dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
+  dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
+
+  return (TFtype) dh + (TFtype) dl;
+}
+#endif
diff --git a/libgcc/config/rs6000/floatunditf.c b/libgcc/config/rs6000/floatunditf.c
--- a/libgcc/config/rs6000/floatunditf.c	1969-12-31 19:00:00.000000000 -0500
+++ b/libgcc/config/rs6000/floatunditf.c	2018-12-12 17:57:15.262473574 -0500
@@ -0,0 +1,47 @@
+/* Software floating-point emulation.
+   Convert a 64bit unsigned integer to IEEE quad
+   Copyright (C) 1997-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson (rth@cygnus.com) and
+		  Jakub Jelinek (jj@ultra.linux.cz).
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file into
+   combinations with other programs, and to distribute those
+   combinations without any restriction coming from the use of this
+   file.  (The Lesser General Public License restrictions do apply in
+   other respects; for example, they cover modification of the file,
+   and distribution when not linked into a combine executable.)
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef _ARCH_PPC64
+#include "soft-fp.h"
+#include "double.h"
+#include "quad-float128.h"
+
+TFtype
+__floatunditf (UDItype u)
+{
+  DFtype dh, dl;
+
+  dh = (USItype) (u >> (sizeof (SItype) * 8));
+  dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
+  dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
+
+  return (TFtype) dh + (TFtype) dl;
+}
+#endif
diff --git a/libgcc/config/rs6000/ppc64-fp.c b/libgcc/config/rs6000/ppc64-fp.c
--- a/libgcc/config/rs6000/ppc64-fp.c	2018-12-12 17:53:49.540038500 -0500
+++ b/libgcc/config/rs6000/ppc64-fp.c	2018-12-12 17:49:51.897235314 -0500
@@ -25,34 +25,21 @@
 <http://www.gnu.org/licenses/>.  */
 
 #if defined(__powerpc64__) || defined (__64BIT__) || defined(__ppc64__)
-#define TMODES
 #include "fp-bit.h"
 
-extern DItype __fixtfdi (TFtype);
 extern DItype __fixdfdi (DFtype);
 extern DItype __fixsfdi (SFtype);
 extern USItype __fixunsdfsi (DFtype);
 extern USItype __fixunssfsi (SFtype);
-extern TFtype __floatditf (DItype);
-extern TFtype __floatunditf (UDItype);
 extern DFtype __floatdidf (DItype);
 extern DFtype __floatundidf (UDItype);
 extern SFtype __floatdisf (DItype);
 extern SFtype __floatundisf (UDItype);
-extern DItype __fixunstfdi (TFtype);
 
 static DItype local_fixunssfdi (SFtype);
 static DItype local_fixunsdfdi (DFtype);
 
 DItype
-__fixtfdi (TFtype a)
-{
-  if (a < 0)
-    return - __fixunstfdi (-a);
-  return __fixunstfdi (a);
-}
-
-DItype
 __fixdfdi (DFtype a)
 {
   if (a < 0)
@@ -86,30 +73,6 @@
   return (SItype) a;
 }
 
-TFtype
-__floatditf (DItype u)
-{
-  DFtype dh, dl;
-
-  dh = (SItype) (u >> (sizeof (SItype) * 8));
-  dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
-  dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
-
-  return (TFtype) dh + (TFtype) dl;
-}
-
-TFtype
-__floatunditf (UDItype u)
-{
-  DFtype dh, dl;
-
-  dh = (USItype) (u >> (sizeof (SItype) * 8));
-  dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
-  dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
-
-  return (TFtype) dh + (TFtype) dl;
-}
-
 DFtype
 __floatdidf (DItype u)
 {
@@ -183,30 +146,6 @@
   return (SFtype) f;
 }
 
-DItype
-__fixunstfdi (TFtype a)
-{
-  if (a < 0)
-    return 0;
-
-  /* Compute high word of result, as a flonum.  */
-  const TFtype b = (a / (((UDItype) 1) << (sizeof (SItype) * 8)));
-  /* Convert that to fixed (but not to DItype!),
-     and shift it into the high word.  */
-  UDItype v = (USItype) b;
-  v <<= (sizeof (SItype) * 8);
-  /* Remove high part from the TFtype, leaving the low part as flonum.  */
-  a -= (TFtype) v;
-  /* Convert that to fixed (but not to DItype!) and add it in.
-     Sometimes A comes out negative.  This is significant, since
-     A has more bits than a long int does.  */
-  if (a < 0)
-    v -= (USItype) (-a);
-  else
-    v += (USItype) a;
-  return v;
-}
-
 /* This version is needed to prevent recursion; fixunsdfdi in libgcc
    calls fixdfdi, which in turn calls calls fixunsdfdi.  */
 
diff --git a/libgcc/config/rs6000/quad-float128.h b/libgcc/config/rs6000/quad-float128.h
--- a/libgcc/config/rs6000/quad-float128.h	2018-12-12 17:53:49.540038500 -0500
+++ b/libgcc/config/rs6000/quad-float128.h	2018-12-12 17:30:19.423468244 -0500
@@ -104,6 +104,11 @@
 extern UTItype_ppc __fixunskfti (TFtype);
 extern TFtype __floattikf (TItype_ppc);
 extern TFtype __floatuntikf (UTItype_ppc);
+
+extern DItype_ppc __fixtfdi (TFtype);
+extern DItype_ppc __fixunstfdi (TFtype);
+extern TFtype __floatditf (DItype_ppc);
+extern TFtype __floatunditf (UDItype_ppc);
 #endif
 
 /* Functions using the ISA 3.0 hardware support.  If the code is compiled with
diff --git a/libgcc/config/rs6000/t-float128 b/libgcc/config/rs6000/t-float128
--- a/libgcc/config/rs6000/t-float128	2018-12-12 17:53:49.540038500 -0500
+++ b/libgcc/config/rs6000/t-float128	2018-12-12 17:45:12.233937136 -0500
@@ -24,6 +24,7 @@
 
 # New functions for software emulation
 fp128_ppc_funcs		= floattikf floatuntikf fixkfti fixunskfti \
+			  floatditf floatunditf fixtfdi fixunstfdi \
 			  extendkftf2-sw trunctfkf2-sw \
 			  sfp-exceptions _mulkc3 _divkc3 _powikf2
 

diff --git a/libgcc/configure b/libgcc/configure
old mode 100644
new mode 100755
index b2f3f870844..ed806587c17
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -619,6 +619,7 @@ build_vendor
 build_cpu
 build
 with_aix_soname
+with_ldbl128
 enable_vtable_verify
 enable_shared
 libgcc_topdir
@@ -668,6 +669,7 @@ with_cross_host
 with_ld
 enable_shared
 enable_vtable_verify
+with_long_double_128
 with_aix_soname
 enable_version_specific_runtime_libs
 with_slibdir
@@ -1329,6 +1331,7 @@ Optional Packages:
   --with-target-subdir=SUBDIR      Configuring in a subdirectory for target
   --with-cross-host=HOST           Configuring with a cross compiler
   --with-ld               arrange to use the specified ld (full pathname)
+  --with-long-double-128  use 128-bit long double by default
   --with-aix-soname=aix|svr4|both
                           shared library versioning (aka "SONAME") variant to
                           provide on AIX
@@ -2213,6 +2216,21 @@ fi
 
 
 
+# Check whether --with-long-double-128 was given.
+if test "${with_long_double_128+set}" = set; then :
+  withval=$with_long_double_128; with_ldbl128="$with_long_double_128"
+else
+  case "${host}" in
+ power*-*-musl*)
+   with_ldbl128="no";;
+ *) with_ldbl128="yes";;
+ esac
+
+fi
+
+
+
+
 # Check whether --with-aix-soname was given.
 if test "${with_aix_soname+set}" = set; then :
   withval=$with_aix_soname; case "${host}:${enable_shared}" in
diff --git a/libgcc/configure.ac b/libgcc/configure.ac
index b59aa746afc..42220a263c5 100644
--- a/libgcc/configure.ac
+++ b/libgcc/configure.ac
@@ -78,6 +78,18 @@ AC_ARG_ENABLE(vtable-verify,
 [enable_vtable_verify=no])
 AC_SUBST(enable_vtable_verify)
 
+AC_ARG_WITH(long-double-128,
+[AS_HELP_STRING([--with-long-double-128],
+    [use 128-bit long double by default])],
+      with_ldbl128="$with_long_double_128",
+[case "${host}" in
+ power*-*-musl*)
+   with_ldbl128="no";;
+ *) with_ldbl128="yes";;
+ esac
+])
+AC_SUBST(with_ldbl128)
+
 AC_ARG_WITH(aix-soname,
 [AS_HELP_STRING([--with-aix-soname=aix|svr4|both],
     [shared library versioning (aka "SONAME") variant to provide on AIX])],
-- 
2.17.0