@@ -4687,6 +4687,14 @@ rs6000_option_override_internal (bool global_init_p)
rs6000_isa_flags &= ~OPTION_MASK_FLOAT128_HW;
}
+ if (TARGET_FLOAT128_HW && !TARGET_64BIT)
+ {
+ if ((rs6000_isa_flags_explicit & OPTION_MASK_FLOAT128_HW) != 0)
+ error ("-mfloat128-hardware requires -m64");
+
+ rs6000_isa_flags &= ~OPTION_MASK_FLOAT128_HW;
+ }
+
if (TARGET_FLOAT128_HW && !TARGET_FLOAT128_KEYWORD
&& (rs6000_isa_flags_explicit & OPTION_MASK_FLOAT128_HW) != 0
&& (rs6000_isa_flags_explicit & OPTION_MASK_FLOAT128_KEYWORD) == 0)
@@ -21,9 +21,6 @@
/* Define if the system-provided CRTs are present on Solaris. */
#undef HAVE_SOLARIS_CRTS
-/* Define if the system-provided CRTs are present on Solaris. */
-#undef HAVE_SOLARIS_CRTS
-
/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H
@@ -4779,6 +4779,8 @@ case ${host} in
# software libraries, and whether the assembler can handle xsaddqp
# for hardware support.
powerpc*-*-linux*)
+ saved_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for PowerPC ISA 2.06 to build __float128 libraries" >&5
$as_echo_n "checking for PowerPC ISA 2.06 to build __float128 libraries... " >&6; }
if test "${libgcc_cv_powerpc_float128+set}" = set; then :
@@ -4786,8 +4788,7 @@ if test "${libgcc_cv_powerpc_float128+set}" = set; then :
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-#pragma GCC target ("vsx")
- vector double dadd (vector double a, vector double b) { return a + b; }
+vector double dadd (vector double a, vector double b) { return a + b; }
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
libgcc_cv_powerpc_float128=yes
@@ -4799,6 +4800,7 @@ fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_powerpc_float128" >&5
$as_echo "$libgcc_cv_powerpc_float128" >&6; }
+ CFLAGS="$CFLAGS -mpower9-vector -mfloat128-hardware"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for PowerPC ISA 3.0 to build hardware __float128 libraries" >&5
$as_echo_n "checking for PowerPC ISA 3.0 to build hardware __float128 libraries... " >&6; }
if test "${libgcc_cv_powerpc_float128_hw+set}" = set; then :
@@ -4806,12 +4808,11 @@ if test "${libgcc_cv_powerpc_float128_hw+set}" = set; then :
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-#pragma GCC target ("vsx,power9-vector")
- #include <sys/auxv.h>
+#include <sys/auxv.h>
#ifndef AT_PLATFORM
#error "AT_PLATFORM is not defined"
#endif
- vector unsigned char (vector unsigned char a, vector unsigned char b)
+ vector unsigned char add (vector unsigned char a, vector unsigned char b)
{
vector unsigned char ret;
__asm__ ("xsaddqp %0,%1,%2" : "=v" (ret) : "v" (a), "v" (b));
@@ -4830,6 +4831,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_powerpc_float128_hw" >&5
$as_echo "$libgcc_cv_powerpc_float128_hw" >&6; }
+ CFLAGS="$saved_CFLAGS"
esac
# Collect host-machine-specific information.
@@ -379,23 +379,24 @@ case ${host} in
# software libraries, and whether the assembler can handle xsaddqp
# for hardware support.
powerpc*-*-linux*)
+ saved_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128"
AC_CACHE_CHECK([for PowerPC ISA 2.06 to build __float128 libraries],
[libgcc_cv_powerpc_float128],
[AC_COMPILE_IFELSE(
- [#pragma GCC target ("vsx")
- vector double dadd (vector double a, vector double b) { return a + b; }],
+ [vector double dadd (vector double a, vector double b) { return a + b; }],
[libgcc_cv_powerpc_float128=yes],
[libgcc_cv_powerpc_float128=no])])
+ CFLAGS="$CFLAGS -mpower9-vector -mfloat128-hardware"
AC_CACHE_CHECK([for PowerPC ISA 3.0 to build hardware __float128 libraries],
[libgcc_cv_powerpc_float128_hw],
[AC_COMPILE_IFELSE(
- [#pragma GCC target ("vsx,power9-vector")
- #include <sys/auxv.h>
+ [#include <sys/auxv.h>
#ifndef AT_PLATFORM
#error "AT_PLATFORM is not defined"
#endif
- vector unsigned char (vector unsigned char a, vector unsigned char b)
+ vector unsigned char add (vector unsigned char a, vector unsigned char b)
{
vector unsigned char ret;
__asm__ ("xsaddqp %0,%1,%2" : "=v" (ret) : "v" (a), "v" (b));
@@ -406,6 +407,7 @@ powerpc*-*-linux*)
__attribute__ ((__ifunc__ ("add_resolver")));],
[libgcc_cv_powerpc_float128_hw=yes],
[libgcc_cv_powerpc_float128_hw=no])])
+ CFLAGS="$saved_CFLAGS"
esac
# Collect host-machine-specific information.
This fixes float128 on BE and on 32-bit. The configure tests need to use -mabi=altivec for 32-bit, since it is not the default there. That also enables the "vector" keyword, used by the tests. To do this it temporarily adds a few flags to the CFLAGS variable. It also fixes a syntax error in the libgcc_cv_powerpc_float128_hw test (the function name was missing in the function declaration). Regenerating config.in (via autoreconf) removed the duplicate definition of HAVE_SOLARIS_CRTS. Finally, this adds a "-mfloat128-hardware requires -m64" test to rs6000.c: all the current patterns need 64-bit registers. Maybe we'll want to add float128 hardware support to 32-bit some day, but certainly not today. Tested on powerpc64-linux {-m32,-m64}, powerpc64le-linux, and powerpc-linux-paired. Committing to trunk. Segher 2017-03-10 Segher Boessenkool <segher@kernel.crashing.org> * config/rs6000/rs6000.c (rs6000_option_override_internal): Disallow -mfloat128-hardware without -m64. libgcc/ * configure.ac (test for libgcc_cv_powerpc_float128): Temporarily modify CFLAGS. Add -mabi=altivec -mvsx -mfloat128. (test for libgcc_cv_powerpc_float128_hw): Add -mpower9-vector and -mfloat128-hardware to the CFLAGS. Fix syntax error in the C snippet. * configure: Regenerate. * config.in: Regenerate. --- gcc/config/rs6000/rs6000.c | 8 ++++++++ libgcc/config.in | 3 --- libgcc/configure | 12 +++++++----- libgcc/configure.ac | 12 +++++++----- 4 files changed, 22 insertions(+), 13 deletions(-)