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* [gcc(refs/users/meissner/heads/work077)] Use default long double from host compiler if not specified on PowerPC.
@ 2022-02-02 18:32 Michael Meissner
0 siblings, 0 replies; 5+ messages in thread
From: Michael Meissner @ 2022-02-02 18:32 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:49866ad94104c3c0b8c31df18dbe58c0aa9874c9
commit 49866ad94104c3c0b8c31df18dbe58c0aa9874c9
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Wed Feb 2 13:32:02 2022 -0500
Use default long double from host compiler if not specified on PowerPC.
If the user did not specify a default long double format, set the long
double type to IEEE 128-bit if the host compiler uses IEEE 128-bit as the
long double default.
I used a Fedora rawhide system that was configured to use the default for
long double being IEEE 128-bit. I built and bootstrapped a compiler on
this system with these patches applied, and I verified that the default
for the compiler used IEEE 128-bit long doubles.
Can I apply this patch to the trunk for GCC 12? Ideally, this should be
back-ported to GCC 11 as well.
2022-02-02 Michael Meissner <meissner@the-meissners.org>
gcc/
* config.in (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): New
configure option.
* config/rs6000/rs6000.cc (TARGET_IEEEQUAD_DEFAULT): If the host
compiler used IEEE 128-bit long doubles and the long double format
was not specified with configuration switches, set the long double
format to IEEE 128-bit.
* configure.ac (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): Set as 1
if the host compiler used IEEE 128-bit long doubles.
* configure: Regenerate.
Diff:
---
gcc/config.in | 5 +++++
gcc/config/rs6000/rs6000.cc | 7 ++++++-
gcc/configure | 33 +++++++++++++++++++++++++++++++++
gcc/configure.ac | 21 ++++++++++++++++++++-
4 files changed, 64 insertions(+), 2 deletions(-)
diff --git a/gcc/config.in b/gcc/config.in
index 64c27c9cfac..8dc90def9ca 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -2732,3 +2732,8 @@
#undef vfork
#endif
+/* Define as 1 if the default long double on a PowerPC system uses the IEEE
+ 128-bit format. */
+#ifndef USED_FOR_TARGET
+#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE
+#endif
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 666dec694a8..e005266361d 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -91,10 +91,15 @@
explicitly redefine TARGET_IEEEQUAD and TARGET_IEEEQUAD_DEFAULT to 0, so
those systems will not pick up this default. This needs to be after all
of the include files, so that POWERPC_LINUX and POWERPC_FREEBSD are
- properly defined. */
+ properly defined.
+
+ If we were built with a host compiler that defaulted to IEEE 128-bit, set
+ the default here to use IEEE 128-bit. */
#ifndef TARGET_IEEEQUAD_DEFAULT
#if !defined (POWERPC_LINUX) && !defined (POWERPC_FREEBSD)
#define TARGET_IEEEQUAD_DEFAULT 1
+#elif defined (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE)
+#define TARGET_IEEEQUAD_DEFAULT TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE
#else
#define TARGET_IEEEQUAD_DEFAULT 0
#endif
diff --git a/gcc/configure b/gcc/configure
index bd4d4721868..824d172b606 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -31473,6 +31473,39 @@ on 64-bit PowerPC VSX Linux systems" "$LINENO" 5
with_long_double_format=""
;;
esac
+else
+ gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking if PowerPC target defaults to IEEE 128-bit long double" >&5
+$as_echo_n "checking if PowerPC target defaults to IEEE 128-bit long double... " >&6; }
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LONG_DOUBLE
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "IEEE_LONG_DOUBLE" >/dev/null 2>&1; then :
+ gcc_cv_powerpc_ieee_long_double=yes
+else
+ gcc_cv_powerpc_ieee_long_double=no
+fi
+rm -f conftest*
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_powerpc_ieee_long_double" >&5
+$as_echo "$gcc_cv_powerpc_ieee_long_double" >&6; }
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+
+$as_echo "#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE 1" >>confdefs.h
+
+ fi
+ ;;
+ esac
fi
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 1171c946e6e..c373b348568 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -6975,7 +6975,26 @@ on 64-bit PowerPC VSX Linux systems])
with_long_double_format=""
;;
esac],
- [])
+ [gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ AC_MSG_CHECKING(if PowerPC target defaults to IEEE 128-bit long double)
+ AC_EGREP_CPP(IEEE_LONG_DOUBLE,[
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LONG_DOUBLE
+#endif
+ ],
+ [gcc_cv_powerpc_ieee_long_double=yes],
+ [gcc_cv_powerpc_ieee_long_double=no])
+ AC_MSG_RESULT($gcc_cv_powerpc_ieee_long_double)
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+ AC_DEFINE(TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE, 1,
+ [Define if long double is IEEE 128-bit on PowerPC systems by default])
+ fi
+ ;;
+ esac])
# Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
# values in the TCB. Currently, only GLIBC 2.23 and later support this.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [gcc(refs/users/meissner/heads/work077)] Use default long double from host compiler if not specified on PowerPC.
@ 2022-02-02 22:01 Michael Meissner
0 siblings, 0 replies; 5+ messages in thread
From: Michael Meissner @ 2022-02-02 22:01 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:b8d97c893cc4dd49fea8970fbcd2077cf57ddc9e
commit b8d97c893cc4dd49fea8970fbcd2077cf57ddc9e
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Wed Feb 2 17:01:08 2022 -0500
Use default long double from host compiler if not specified on PowerPC.
If the user did not specify a default long double format, set the long
double type to IEEE 128-bit if the host compiler uses IEEE 128-bit as the
long double default.
I used a Fedora rawhide system that was configured to use the default for
long double being IEEE 128-bit. I built and bootstrapped a compiler on
this system with these patches applied, and I verified that the default
for the compiler used IEEE 128-bit long doubles.
Can I apply this patch to the trunk for GCC 12? Ideally, this should be
back-ported to GCC 11 as well.
2022-02-02 Michael Meissner <meissner@the-meissners.org>
gcc/
* config.in (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): New
configure option.
* config/rs6000/rs6000.cc (TARGET_IEEEQUAD_DEFAULT): If the host
compiler used IEEE 128-bit long doubles and the long double format
was not specified with configuration switches, set the long double
format to IEEE 128-bit.
* configure.ac (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): Set as 1
if the host compiler used IEEE 128-bit long doubles.
* configure: Regenerate.
Diff:
---
gcc/config.in | 4 ++++
gcc/config/rs6000/rs6000.cc | 7 ++++++-
gcc/configure | 33 +++++++++++++++++++++++++++++++++
gcc/configure.ac | 21 ++++++++++++++++++++-
4 files changed, 63 insertions(+), 2 deletions(-)
diff --git a/gcc/config.in b/gcc/config.in
index 64c27c9cfac..746c522e4e6 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -2732,3 +2732,7 @@
#undef vfork
#endif
+/* Define if long double is IEEE 128-bit on PowerPC systems by default. */
+#ifndef USED_FOR_TARGET
+#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE
+#endif
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 666dec694a8..a0e234438cd 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -91,10 +91,15 @@
explicitly redefine TARGET_IEEEQUAD and TARGET_IEEEQUAD_DEFAULT to 0, so
those systems will not pick up this default. This needs to be after all
of the include files, so that POWERPC_LINUX and POWERPC_FREEBSD are
- properly defined. */
+ properly defined.
+
+ If we were built with a host compiler that defaulted to IEEE 128-bit, set
+ the default here to use IEEE 128-bit. */
#ifndef TARGET_IEEEQUAD_DEFAULT
#if !defined (POWERPC_LINUX) && !defined (POWERPC_FREEBSD)
#define TARGET_IEEEQUAD_DEFAULT 1
+#elif defined (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE)
+#define TARGET_IEEEQUAD_DEFAULT 1
#else
#define TARGET_IEEEQUAD_DEFAULT 0
#endif
diff --git a/gcc/configure b/gcc/configure
index bd4d4721868..113860968ed 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -31473,6 +31473,39 @@ on 64-bit PowerPC VSX Linux systems" "$LINENO" 5
with_long_double_format=""
;;
esac
+else
+ gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking if PowerPC target defaults to IEEE 128-bit long double" >&5
+$as_echo_n "checking if PowerPC target defaults to IEEE 128-bit long double... " >&6; }
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LDBL
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "IEEE_LDBL" >/dev/null 2>&1; then :
+ gcc_cv_powerpc_ieee_long_double=yes
+else
+ gcc_cv_powerpc_ieee_long_double=no
+fi
+rm -f conftest*
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_powerpc_ieee_long_double" >&5
+$as_echo "$gcc_cv_powerpc_ieee_long_double" >&6; }
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+
+$as_echo "#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE 1" >>confdefs.h
+
+ fi
+ ;;
+ esac
fi
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 1171c946e6e..d7a0d6e6999 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -6975,7 +6975,26 @@ on 64-bit PowerPC VSX Linux systems])
with_long_double_format=""
;;
esac],
- [])
+ [gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ AC_MSG_CHECKING(if PowerPC target defaults to IEEE 128-bit long double)
+ AC_EGREP_CPP(IEEE_LDBL,[
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LDBL
+#endif
+ ],
+ [gcc_cv_powerpc_ieee_long_double=yes],
+ [gcc_cv_powerpc_ieee_long_double=no])
+ AC_MSG_RESULT($gcc_cv_powerpc_ieee_long_double)
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+ AC_DEFINE(TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE, 1,
+ [Define if long double is IEEE 128-bit on PowerPC systems by default])
+ fi
+ ;;
+ esac])
# Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
# values in the TCB. Currently, only GLIBC 2.23 and later support this.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [gcc(refs/users/meissner/heads/work077)] Use default long double from host compiler if not specified on PowerPC.
@ 2022-02-02 18:51 Michael Meissner
0 siblings, 0 replies; 5+ messages in thread
From: Michael Meissner @ 2022-02-02 18:51 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:867f8fea64b744889b28ecf1ffa6125527475c74
commit 867f8fea64b744889b28ecf1ffa6125527475c74
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Wed Feb 2 13:50:52 2022 -0500
Use default long double from host compiler if not specified on PowerPC.
If the user did not specify a default long double format, set the long
double type to IEEE 128-bit if the host compiler uses IEEE 128-bit as the
long double default.
I used a Fedora rawhide system that was configured to use the default for
long double being IEEE 128-bit. I built and bootstrapped a compiler on
this system with these patches applied, and I verified that the default
for the compiler used IEEE 128-bit long doubles.
Can I apply this patch to the trunk for GCC 12? Ideally, this should be
back-ported to GCC 11 as well.
2022-02-02 Michael Meissner <meissner@the-meissners.org>
gcc/
* config.in (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): New
configure option.
* config/rs6000/rs6000.cc (TARGET_IEEEQUAD_DEFAULT): If the host
compiler used IEEE 128-bit long doubles and the long double format
was not specified with configuration switches, set the long double
format to IEEE 128-bit.
* configure.ac (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): Set as 1
if the host compiler used IEEE 128-bit long doubles.
* configure: Regenerate.
Diff:
---
gcc/config.in | 4 ++++
gcc/config/rs6000/rs6000.cc | 7 ++++++-
gcc/configure | 33 +++++++++++++++++++++++++++++++++
gcc/configure.ac | 21 ++++++++++++++++++++-
4 files changed, 63 insertions(+), 2 deletions(-)
diff --git a/gcc/config.in b/gcc/config.in
index 64c27c9cfac..746c522e4e6 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -2732,3 +2732,7 @@
#undef vfork
#endif
+/* Define if long double is IEEE 128-bit on PowerPC systems by default. */
+#ifndef USED_FOR_TARGET
+#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE
+#endif
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 666dec694a8..a0e234438cd 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -91,10 +91,15 @@
explicitly redefine TARGET_IEEEQUAD and TARGET_IEEEQUAD_DEFAULT to 0, so
those systems will not pick up this default. This needs to be after all
of the include files, so that POWERPC_LINUX and POWERPC_FREEBSD are
- properly defined. */
+ properly defined.
+
+ If we were built with a host compiler that defaulted to IEEE 128-bit, set
+ the default here to use IEEE 128-bit. */
#ifndef TARGET_IEEEQUAD_DEFAULT
#if !defined (POWERPC_LINUX) && !defined (POWERPC_FREEBSD)
#define TARGET_IEEEQUAD_DEFAULT 1
+#elif defined (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE)
+#define TARGET_IEEEQUAD_DEFAULT 1
#else
#define TARGET_IEEEQUAD_DEFAULT 0
#endif
diff --git a/gcc/configure b/gcc/configure
index bd4d4721868..824d172b606 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -31473,6 +31473,39 @@ on 64-bit PowerPC VSX Linux systems" "$LINENO" 5
with_long_double_format=""
;;
esac
+else
+ gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking if PowerPC target defaults to IEEE 128-bit long double" >&5
+$as_echo_n "checking if PowerPC target defaults to IEEE 128-bit long double... " >&6; }
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LONG_DOUBLE
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "IEEE_LONG_DOUBLE" >/dev/null 2>&1; then :
+ gcc_cv_powerpc_ieee_long_double=yes
+else
+ gcc_cv_powerpc_ieee_long_double=no
+fi
+rm -f conftest*
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_powerpc_ieee_long_double" >&5
+$as_echo "$gcc_cv_powerpc_ieee_long_double" >&6; }
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+
+$as_echo "#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE 1" >>confdefs.h
+
+ fi
+ ;;
+ esac
fi
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 1171c946e6e..c373b348568 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -6975,7 +6975,26 @@ on 64-bit PowerPC VSX Linux systems])
with_long_double_format=""
;;
esac],
- [])
+ [gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ AC_MSG_CHECKING(if PowerPC target defaults to IEEE 128-bit long double)
+ AC_EGREP_CPP(IEEE_LONG_DOUBLE,[
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LONG_DOUBLE
+#endif
+ ],
+ [gcc_cv_powerpc_ieee_long_double=yes],
+ [gcc_cv_powerpc_ieee_long_double=no])
+ AC_MSG_RESULT($gcc_cv_powerpc_ieee_long_double)
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+ AC_DEFINE(TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE, 1,
+ [Define if long double is IEEE 128-bit on PowerPC systems by default])
+ fi
+ ;;
+ esac])
# Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
# values in the TCB. Currently, only GLIBC 2.23 and later support this.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [gcc(refs/users/meissner/heads/work077)] Use default long double from host compiler if not specified on PowerPC.
@ 2022-02-02 5:01 Michael Meissner
0 siblings, 0 replies; 5+ messages in thread
From: Michael Meissner @ 2022-02-02 5:01 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:c165b32bcf898a540fad83463fc1c9ac561ebfe0
commit c165b32bcf898a540fad83463fc1c9ac561ebfe0
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Wed Feb 2 00:01:36 2022 -0500
Use default long double from host compiler if not specified on PowerPC.
If the user did not specify a default long double format, set the long
double type to IEEE 128-bit if the host compiler uses IEEE 128-bit as the
long double default.
I used a Fedora rawhide system that was configured to use the default for
long double being IEEE 128-bit. I built and bootstrapped a compiler on
this system with these patches applied, and I verified that the default
for the compiler used IEEE 128-bit long doubles.
Can I apply this patch to the trunk for GCC 12? Ideally, this should be
back-ported to GCC 11 as well.
2022-02-01 Michael Meissner <meissner@the-meissners.org>
gcc/
* config.in (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): New
configure option.
* config/rs6000/rs6000.cc (TARGET_IEEEQUAD_DEFAULT): If the host
compiler used IEEE 128-bit long doubles and the long double format
was not specified with configuration switches, set the long double
format to IEEE 128-bit.
* configure.ac (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): Set as 1
if the host compiler used IEEE 128-bit long doubles.
* configure: Regenerate.
Diff:
---
gcc/config.in | 5 +++++
gcc/config/rs6000/rs6000.cc | 7 ++++++-
gcc/configure | 33 +++++++++++++++++++++++++++++++++
gcc/configure.ac | 21 ++++++++++++++++++++-
4 files changed, 64 insertions(+), 2 deletions(-)
diff --git a/gcc/config.in b/gcc/config.in
index 64c27c9cfac..8dc90def9ca 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -2732,3 +2732,8 @@
#undef vfork
#endif
+/* Define as 1 if the default long double on a PowerPC system uses the IEEE
+ 128-bit format. */
+#ifndef USED_FOR_TARGET
+#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE
+#endif
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 666dec694a8..ea0e4cde3b6 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -91,10 +91,15 @@
explicitly redefine TARGET_IEEEQUAD and TARGET_IEEEQUAD_DEFAULT to 0, so
those systems will not pick up this default. This needs to be after all
of the include files, so that POWERPC_LINUX and POWERPC_FREEBSD are
- properly defined. */
+ properly defined.
+
+ If we were built with a host compiler that defaulted to IEEE 128-bit, set
+ the default here to use IEEE 128-bit. */
#ifndef TARGET_IEEEQUAD_DEFAULT
#if !defined (POWERPC_LINUX) && !defined (POWERPC_FREEBSD)
#define TARGET_IEEEQUAD_DEFAULT 1
+#elif TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE
+#define TARGET_IEEEQUAD_DEFAULT 1
#else
#define TARGET_IEEEQUAD_DEFAULT 0
#endif
diff --git a/gcc/configure b/gcc/configure
index bd4d4721868..824d172b606 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -31473,6 +31473,39 @@ on 64-bit PowerPC VSX Linux systems" "$LINENO" 5
with_long_double_format=""
;;
esac
+else
+ gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking if PowerPC target defaults to IEEE 128-bit long double" >&5
+$as_echo_n "checking if PowerPC target defaults to IEEE 128-bit long double... " >&6; }
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LONG_DOUBLE
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "IEEE_LONG_DOUBLE" >/dev/null 2>&1; then :
+ gcc_cv_powerpc_ieee_long_double=yes
+else
+ gcc_cv_powerpc_ieee_long_double=no
+fi
+rm -f conftest*
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_powerpc_ieee_long_double" >&5
+$as_echo "$gcc_cv_powerpc_ieee_long_double" >&6; }
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+
+$as_echo "#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE 1" >>confdefs.h
+
+ fi
+ ;;
+ esac
fi
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 1171c946e6e..c373b348568 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -6975,7 +6975,26 @@ on 64-bit PowerPC VSX Linux systems])
with_long_double_format=""
;;
esac],
- [])
+ [gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ AC_MSG_CHECKING(if PowerPC target defaults to IEEE 128-bit long double)
+ AC_EGREP_CPP(IEEE_LONG_DOUBLE,[
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LONG_DOUBLE
+#endif
+ ],
+ [gcc_cv_powerpc_ieee_long_double=yes],
+ [gcc_cv_powerpc_ieee_long_double=no])
+ AC_MSG_RESULT($gcc_cv_powerpc_ieee_long_double)
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+ AC_DEFINE(TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE, 1,
+ [Define if long double is IEEE 128-bit on PowerPC systems by default])
+ fi
+ ;;
+ esac])
# Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
# values in the TCB. Currently, only GLIBC 2.23 and later support this.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [gcc(refs/users/meissner/heads/work077)] Use default long double from host compiler if not specified on PowerPC.
@ 2022-02-02 3:12 Michael Meissner
0 siblings, 0 replies; 5+ messages in thread
From: Michael Meissner @ 2022-02-02 3:12 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:d4151bb7d3347d3b734c51428a03cd1c457451d1
commit d4151bb7d3347d3b734c51428a03cd1c457451d1
Author: Michael Meissner <meissner@linux.ibm.com>
Date: Tue Feb 1 22:12:17 2022 -0500
Use default long double from host compiler if not specified on PowerPC.
If the user did not specify a default long double format, set the long
double type to IEEE 128-bit if the host compiler uses IEEE 128-bit as the
long double default.
I used a Fedora rawhide system that was configured to use the default for
long double being IEEE 128-bit. I built and bootstrapped a compiler on
this system with these patches applied, and I verified that the default
for the compiler used IEEE 128-bit long doubles.
Can I apply this patch to the trunk for GCC 12? Ideally, this should be
back-ported to GCC 11 as well.
2022-02-01 Michael Meissner <meissner@the-meissners.org>
gcc/
* config.in (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): New
configure option.
* config/rs6000/rs6000.cc (TARGET_IEEEQUAD_DEFAULT): If the host
compiler used IEEE 128-bit long doubles and the long double format
was not specified with configuration switches, set the long double
format to IEEE 128-bit.
* configure.ac (TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE): Set as 1
if the host compiler used IEEE 128-bit long doubles.
* configure: Regenerate.
Diff:
---
gcc/config.in | 5 +++++
gcc/config/rs6000/rs6000.cc | 7 ++++++-
gcc/configure | 33 +++++++++++++++++++++++++++++++++
gcc/configure.ac | 21 ++++++++++++++++++++-
4 files changed, 64 insertions(+), 2 deletions(-)
diff --git a/gcc/config.in b/gcc/config.in
index 64c27c9cfac..8dc90def9ca 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -2732,3 +2732,8 @@
#undef vfork
#endif
+/* Define as 1 if the default long double on a PowerPC system uses the IEEE
+ 128-bit format. */
+#ifndef USED_FOR_TARGET
+#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE
+#endif
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 666dec694a8..ea0e4cde3b6 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -91,10 +91,15 @@
explicitly redefine TARGET_IEEEQUAD and TARGET_IEEEQUAD_DEFAULT to 0, so
those systems will not pick up this default. This needs to be after all
of the include files, so that POWERPC_LINUX and POWERPC_FREEBSD are
- properly defined. */
+ properly defined.
+
+ If we were built with a host compiler that defaulted to IEEE 128-bit, set
+ the default here to use IEEE 128-bit. */
#ifndef TARGET_IEEEQUAD_DEFAULT
#if !defined (POWERPC_LINUX) && !defined (POWERPC_FREEBSD)
#define TARGET_IEEEQUAD_DEFAULT 1
+#elif TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE
+#define TARGET_IEEEQUAD_DEFAULT 1
#else
#define TARGET_IEEEQUAD_DEFAULT 0
#endif
diff --git a/gcc/configure b/gcc/configure
index bd4d4721868..824d172b606 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -31473,6 +31473,39 @@ on 64-bit PowerPC VSX Linux systems" "$LINENO" 5
with_long_double_format=""
;;
esac
+else
+ gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking if PowerPC target defaults to IEEE 128-bit long double" >&5
+$as_echo_n "checking if PowerPC target defaults to IEEE 128-bit long double... " >&6; }
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LONG_DOUBLE
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "IEEE_LONG_DOUBLE" >/dev/null 2>&1; then :
+ gcc_cv_powerpc_ieee_long_double=yes
+else
+ gcc_cv_powerpc_ieee_long_double=no
+fi
+rm -f conftest*
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_powerpc_ieee_long_double" >&5
+$as_echo "$gcc_cv_powerpc_ieee_long_double" >&6; }
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+
+$as_echo "#define TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE 1" >>confdefs.h
+
+ fi
+ ;;
+ esac
fi
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 1171c946e6e..099e91d2a3f 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -6975,7 +6975,26 @@ on 64-bit PowerPC VSX Linux systems])
with_long_double_format=""
;;
esac],
- [])
+ [gcc_cv_powerpc_ieee_long_double=no
+ case "$target" in
+ powerpc*-*-linux*)
+ # If --with-long-double format is not set, check to see whether the host
+ # compiler defaults to it.
+ AC_MSG_CHECKING(if PowerPC target defaults to IEEE 128-bit long double)
+ AC_EGREP_CPP(IEEE_LONG_DOUBLE,[
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+IEEE_LONG_DOUBLE
+#endif
+ ],
+ [gcc_cv_powerpc_ieee_long_double=yes],
+ [gcc_cv_powerpc_ieee_long_double=no])
+ AC_MSG_RESULT($gcc_cv_powerpc_ieee_long_double)
+ if test x$gcc_cv_powerpc_ieee_long_double = xyes; then
+ AC_DEFINE(TARGET_POWERPC_IEEE_128BIT_LONG_DOUBLE, 1,
+ [Define if long double in IEEE 128-bit on PowerPC systems by default])
+ fi
+ ;;
+ esac])
# Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
# values in the TCB. Currently, only GLIBC 2.23 and later support this.
^ permalink raw reply [flat|nested] 5+ messages in thread
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