From: Ulrich Weigand <uweigand@de.ibm.com>
Date: Tue, 10 Sep 2002 18:46:06 +0000 (+0000)
Subject: s390.h (MOVE_MAX): Define to correct value.
X-Git-Tag: releases/gcc-3.3.0~2914
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=33b679d10a7186845cba6c783c85a7fb841aeac9;p=thirdparty%2Fgcc.git

s390.h (MOVE_MAX): Define to correct value.

	* config/s390/s390.h (MOVE_MAX): Define to correct value.
	(MAX_MOVE_MAX): Define.
	(MOVE_BY_PIECES_P): Define.
	(CLEAR_BY_PIECES_P): Define.

From-SVN: r57010
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1bad2c675151..6242b777d9e3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2002-09-10  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* config/s390/s390.h (MOVE_MAX): Define to correct value.
+	(MAX_MOVE_MAX): Define.
+	(MOVE_BY_PIECES_P): Define.
+	(CLEAR_BY_PIECES_P): Define.
+
 2002-09-10  Denis Chertykov  <denisc@overta.ru>
 
 	* config/avr/avr.md (movstrhi): Use right operands for conversion.
diff --git a/gcc/config/s390/s390.h b/gcc/config/s390/s390.h
index 781dc2ea7e42..40b94f0b1a22 100644
--- a/gcc/config/s390/s390.h
+++ b/gcc/config/s390/s390.h
@@ -1035,10 +1035,23 @@ CUMULATIVE_ARGS;
 
 #define DEFAULT_SIGNED_CHAR 0
 
-/* Max number of bytes we can move from memory to memory in one reasonably
-   fast instruction.  */
+/* The maximum number of bytes that a single instruction can move quickly
+   between memory and registers or between two memory locations. */
 
-#define MOVE_MAX 256
+#define MOVE_MAX (TARGET_64BIT ? 16 : 8)
+#define MAX_MOVE_MAX 16
+
+/* Determine whether to use move_by_pieces or block move insn.  */
+
+#define MOVE_BY_PIECES_P(SIZE, ALIGN)		\
+  ( (SIZE) == 1 || (SIZE) == 2 || (SIZE) == 4	\
+    || (TARGET_64BIT && (SIZE) == 8) )
+
+/* Determine whether to use clear_by_pieces or block clear insn.  */
+
+#define CLEAR_BY_PIECES_P(SIZE, ALIGN)		\
+  ( (SIZE) == 1 || (SIZE) == 2 || (SIZE) == 4	\
+    || (TARGET_64BIT && (SIZE) == 8) )
 
 /* Nonzero if access to memory by bytes is slow and undesirable.  */