* libc/string/memset.c (memset): Make it safe even if

	sizeof (int) = 2.

1 files changed, 6 insertions, 4 deletions

diff --git a/newlib/libc/string/memset.c b/newlib/libc/string/memset.c
index a5890c884..eceff8e9c 100644
--- a/newlib/libc/string/memset.c
+++ b/newlib/libc/string/memset.c
@@ -64,21 +64,23 @@ _DEFUN (memset, (m, c, n),
     {
       /* If we get this far, we know that n is large and m is word-aligned. */
 
+      /* To avoid sign extention, copy C to an unsigned variable.  */
+      unsigned int d = c & 0xff;
+
       aligned_addr = (unsigned long*)m;
 
-      /* Store C into each char sized location in BUFFER so that
+      /* Store D into each char sized location in BUFFER so that
          we can set large blocks quickly.  */
-      c &= 0xff;
       if (LBLOCKSIZE == 4)
         {
-          buffer = (c << 8) | c;
+          buffer = (d << 8) | d;
           buffer |= (buffer << 16);
         }
       else
         {
           buffer = 0;
           for (i = 0; i < LBLOCKSIZE; i++)
-	    buffer = (buffer << 8) | c;
+	    buffer = (buffer << 8) | d;
         }
 
       while (n >= LBLOCKSIZE*4)