diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bb10ffaf24a..053a25ff387 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Fri Apr 24 16:45:03 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* (gen_shl_and, in case 1): Fix comparison with mask.
+
 Fri Apr 24 06:46:40 1998  Nick Clifton  <nickc@cygnus.com>
 
 	* config/arm/thumb.h (GO_IF_LEGITIMATE_ADDRESS): Disallow frame
diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c
index 6441a41063c..437164c924a 100644
--- a/gcc/config/sh/sh.c
+++ b/gcc/config/sh/sh.c
@@ -1292,7 +1292,7 @@ gen_shl_and (dest, left_rtx, mask_rtx, source)
 
 	if (first < 0)
 	  {
-	    emit_insn ((mask << right) == 0xff
+	    emit_insn ((mask << right) <= 0xff
 		       ? gen_zero_extendqisi2(dest,
 					      gen_lowpart (QImode, source))
 		       : gen_zero_extendhisi2(dest,
@@ -1315,7 +1315,7 @@ gen_shl_and (dest, left_rtx, mask_rtx, source)
 	    mask <<= first;
 	  }
 	if (first >= 0)
-	  emit_insn (mask == 0xff
+	  emit_insn (mask <= 0xff
 		     ? gen_zero_extendqisi2(dest, gen_lowpart (QImode, dest))
 		     : gen_zero_extendhisi2(dest, gen_lowpart (HImode, dest)));
 	if (total_shift > 0)