diff options
Diffstat (limited to 'libgcc/configure.ac')
| -rw-r--r-- | libgcc/configure.ac | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/libgcc/configure.ac b/libgcc/configure.ac index 897259e..269997f 100644 --- a/libgcc/configure.ac +++ b/libgcc/configure.ac @@ -374,26 +374,30 @@ esac esac case ${host} in +# At present, we cannot turn -mfloat128 on via #pragma GCC target, +# so just check if we have VSX (ISA 2.06) support to build the +# software libraries, and whether the assembler can handle xsaddqp +# for hardware support. powerpc*-*-linux*) - AC_CACHE_CHECK([whether the PowerPC compiler can do __float128], + AC_CACHE_CHECK([for PowerPC ISA 2.06 to build __float128 libraries], [libgcc_cv_powerpc_float128], [AC_COMPILE_IFELSE( - [#pragma GCC target ("vsx,float128") - __float128 add (__float128 *a) { return *a + *(a+1); }], + [#pragma GCC target ("vsx") + vector double dadd (vector double a, vector double b) { return a + b; }], [libgcc_cv_powerpc_float128=yes], [libgcc_cv_powerpc_float128=no])]) - AC_CACHE_CHECK([whether the PowerPC compiler can do hardware __float128], + AC_CACHE_CHECK([for PowerPC ISA 3.0 to build hardware __float128 libraries], [libgcc_cv_powerpc_float128_hw], [AC_COMPILE_IFELSE( - [#pragma GCC target ("cpu=power9,float128,float128-hardware") + [#pragma GCC target ("vsx,power9-vector") #include <sys/auxv.h> #ifndef AT_PLATFORM #error "AT_PLATFORM is not defined" #endif - __float128 add (__float128 a, __float128 b) + vector unsigned char (vector unsigned char a, vector unsigned char b) { - __float128 ret; + vector unsigned char ret; __asm__ ("xsaddqp %0,%1,%2" : "=v" (ret) : "v" (a), "v" (b)); return ret; } |