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author | Segher Boessenkool <segher@kernel.crashing.org> | 2017-03-10 18:57:58 +0100 |
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committer | Segher Boessenkool <segher@gcc.gnu.org> | 2017-03-10 18:57:58 +0100 |
commit | 7502c5970d0af6cc71c2a906d55d95a31322bc07 (patch) | |
tree | 16e2a026b5e756c50a081d806968d0a5851baaf4 /libgcc/configure.ac | |
parent | 0c942f3edab10854aecdf92e8bd79ca6bc33bc66 (diff) | |
download | gcc-7502c5970d0af6cc71c2a906d55d95a31322bc07.zip gcc-7502c5970d0af6cc71c2a906d55d95a31322bc07.tar.gz gcc-7502c5970d0af6cc71c2a906d55d95a31322bc07.tar.bz2 |
rs6000: float128 on BE and 32-bit
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
Diffstat (limited to 'libgcc/configure.ac')
-rw-r--r-- | libgcc/configure.ac | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/libgcc/configure.ac b/libgcc/configure.ac index ea2030f..af15147 100644 --- a/libgcc/configure.ac +++ b/libgcc/configure.ac @@ -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. |