(mpn_incr_u): New macro (from mpn/generic/mul_n.c).

(mpn_decr_u): New macro.

1 files changed, 18 insertions, 0 deletions

diff --git a/gmp.h b/gmp.h
index c2f89fab1..646044d2d 100644
--- a/gmp.h
+++ b/gmp.h
@@ -713,6 +713,24 @@ mp_limb_t mpn_submul_1 _PROTO ((mp_ptr, mp_srcptr, mp_size_t, mp_limb_t));
 }
 #endif
 
+#define mpn_incr_u(p,incr) \
+  do { mp_limb_t __x; mp_ptr __p = p;			\
+    __x = *__p + incr;					\
+    *__p = __x;						\
+    if (__x < incr)					\
+      while (++(*(++__p)) == 0)				\
+        ;						\
+  } while (0)
+
+#define mpn_decr_u(p,incr) \
+  do { mp_limb_t __x; mp_ptr __p = p;			\
+    __x = *__p;						\
+    *__p = __x - incr;					\
+    if (__x < incr)					\
+      while ((*(++__p))-- == 0)				\
+        ;						\
+  } while (0)
+
 #if defined (__GNUC__) || defined (_FORCE_INLINES)
 _EXTERN_INLINE mp_limb_t
 #if defined (__STDC__) || defined (__cplusplus)