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rs6000: float128 on BE and 32-bit

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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.


	* 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.

From-SVN: r246043
This commit is contained in:
Segher Boessenkool 2017-03-10 18:57:58 +01:00 committed by Segher Boessenkool
parent 0c942f3eda
commit 7502c5970d
6 changed files with 37 additions and 14 deletions
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7
gcc/ChangeLog
View File

@ -1,5 +1,10 @@
2017-03-10 Segher Boessenkool <segher@kernel.crashing.org>
* config/rs6000/rs6000.c (rs6000_option_override_internal): Disallow
-mfloat128-hardware without -m64.
2017-03-10 Will Schmidt <will_schmidt@vnet.ibm.com>
PR target/79941
* config/rs6000/rs6000.c (builtin_function_type): Add VMUL*U[HB]
entries to the case statement that marks unsigned arguments to

8
gcc/config/rs6000/rs6000.c
View File

@ -4686,6 +4686,14 @@ 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)

9
libgcc/ChangeLog
View File

@ -1,3 +1,12 @@
2017-03-10 Segher Boessenkool <segher@kernel.crashing.org>
* 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.
2017-03-02 Jonathan Yong <10walls@gmail.com>
* config/i386/gthr-win32.h: Define NOGDI before

3
libgcc/config.in
View File

@ -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

12
libgcc/configure vendored
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@ -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.

12
libgcc/configure.ac
View File

@ -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.