1 files changed, 55 insertions, 0 deletions
diff --git a/libgcc/configure b/libgcc/configure
index 78708c7f407..de8c13c4ba3 100644
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -4766,6 +4766,61 @@ esac
 ;;
 esac
 
+case ${host} in
+powerpc*-*-linux*)
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the PowerPC compiler can do __float128" >&5
+$as_echo_n "checking whether the PowerPC compiler can do __float128... " >&6; }
+if test "${libgcc_cv_powerpc_float128+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#pragma GCC target ("vsx,float128")
+     __float128 add (__float128 *a) { return *a + *(a+1); }
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  libgcc_cv_powerpc_float128=yes
+else
+  libgcc_cv_powerpc_float128=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_powerpc_float128" >&5
+$as_echo "$libgcc_cv_powerpc_float128" >&6; }
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the PowerPC compiler can do hardware __float128" >&5
+$as_echo_n "checking whether the PowerPC compiler can do hardware __float128... " >&6; }
+if test "${libgcc_cv_powerpc_float128_hw+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#pragma GCC target ("cpu=power9,float128,float128-hardware")
+     #include <sys/auxv.h>
+     #ifndef AT_PLATFORM
+     #error "AT_PLATFORM is not defined"
+     #endif
+     __float128 add (__float128 a, __float128 b)
+     {
+       __float128 ret;
+       __asm__ ("xsaddqp %0,%1,%2" : "=v" (ret) : "v" (a), "v" (b));
+       return ret;
+     }
+     void *add_resolver (void) { return (void *) add; }
+     __float128 add_ifunc (__float128, __float128)
+	__attribute__ ((__ifunc__ ("add_resolver")));
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  libgcc_cv_powerpc_float128_hw=yes
+else
+  libgcc_cv_powerpc_float128_hw=no
+fi
+rm -f core conftest.err conftest.$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; }
+esac
+
 # Collect host-machine-specific information.
 . ${srcdir}/config.host