1 files changed, 32 insertions, 0 deletions
diff --git a/gcc/hwint.c b/gcc/hwint.c
index 330b42c68e7..134fe1da2cc 100644
--- a/gcc/hwint.c
+++ b/gcc/hwint.c
@@ -204,3 +204,35 @@ least_common_multiple (HOST_WIDE_INT a, HOST_WIDE_INT b)
 {
   return mul_hwi (abs_hwi (a) / gcd (a, b), abs_hwi (b));
 }
+
+#ifdef ENABLE_CHECKING
+/* Sign extend SRC starting from PREC.  */
+
+HOST_WIDE_INT
+sext_hwi (HOST_WIDE_INT src, unsigned int prec)
+{
+  gcc_checking_assert (prec <= HOST_BITS_PER_WIDE_INT);
+
+  if (prec == HOST_BITS_PER_WIDE_INT)
+    return src;
+  else
+    {
+      int shift = HOST_BITS_PER_WIDE_INT - prec;
+      return (src << shift) >> shift;
+    }
+}
+
+/* Zero extend SRC starting from PREC.  */
+
+unsigned HOST_WIDE_INT
+zext_hwi (unsigned HOST_WIDE_INT src, unsigned int prec)
+{
+  gcc_checking_assert (prec <= HOST_BITS_PER_WIDE_INT);
+
+  if (prec == HOST_BITS_PER_WIDE_INT)
+    return src;
+  else
+    return src & (((HOST_WIDE_INT)1 << prec) - 1);
+}
+
+#endif