Index: head/lib/msun/src/s_nan.c
===================================================================
--- head/lib/msun/src/s_nan.c
+++ head/lib/msun/src/s_nan.c
@@ -66,14 +66,15 @@
 		;
 
 	/* Scan backwards, filling in the bits in words[] as we go. */
-#if _BYTE_ORDER == _LITTLE_ENDIAN
 	for (bitpos = 0; bitpos < 32 * num_words; bitpos += 4) {
-#else
-	for (bitpos = 32 * num_words - 4; bitpos >= 0; bitpos -= 4) {
-#endif
 		if (--si < 0)
 			break;
+#if _BYTE_ORDER == _LITTLE_ENDIAN
 		words[bitpos / 32] |= digittoint(s[si]) << (bitpos % 32);
+#else
+		words[num_words - 1 - bitpos / 32] |=
+		    digittoint(s[si]) << (bitpos % 32);
+#endif
 	}
 }