diff -up gmp-6.0.0/mpn/powerpc64/mode64/gcd_1.asm.rh1 gmp-6.0.0/mpn/powerpc64/mode64/gcd_1.asm
--- gmp-6.0.0/mpn/powerpc64/mode64/gcd_1.asm.rh1	2014-04-24 17:44:56.282296502 +0200
+++ gmp-6.0.0/mpn/powerpc64/mode64/gcd_1.asm	2014-04-24 17:46:07.291786670 +0200
@@ -43,6 +43,9 @@ define(`up',    `r3')
 define(`n',     `r4')
 define(`v0',    `r5')
 
+ifdef(`BMOD_1_TO_MOD_1_THRESHOLD',,
+  `define(`BMOD_1_TO_MOD_1_THRESHOLD',30)')
+
 EXTERN_FUNC(mpn_mod_1)
 EXTERN_FUNC(mpn_modexact_1c_odd)