From: Kazu Hirata <kazu@cs.umass.edu>
Date: Mon, 3 Mar 2003 12:57:10 +0000 (+0000)
Subject: * config/h8300/h8300.md (a peephole2): New.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6967a12651bd724104b9d9e695b78372df65d8e6;p=gcc.git

* config/h8300/h8300.md (a peephole2): New.

From-SVN: r63719
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 8b81f7e31eb..5d6ece21cee 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2003-03-03  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* config/h8300/h8300.md (a peephole2): New.
+
 2003-03-03  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* config/h8300/h8300.md (*extzv_8_8): Use shorter code when
diff --git a/gcc/config/h8300/h8300.md b/gcc/config/h8300/h8300.md
index 28cb87ec7ff..1c031b90381 100644
--- a/gcc/config/h8300/h8300.md
+++ b/gcc/config/h8300/h8300.md
@@ -3561,6 +3561,23 @@
 		  ? gen_rtx_GE (VOIDmode, cc0_rtx, const0_rtx)
 		  : gen_rtx_LT (VOIDmode, cc0_rtx, const0_rtx));")
 
+(define_peephole2
+  [(set (match_operand:SI 0 "register_operand" "")
+	(match_operand:SI 1 "register_operand" ""))
+   (set (match_dup 0)
+	(and:SI (match_dup 0)
+		(const_int 255)))]
+  "(TARGET_H8300H || TARGET_H8300S)
+   && REG_P (operands[0])
+   && REG_P (operands[1])
+   && REGNO (operands[0]) != REGNO (operands[1])"
+  [(set (match_dup 0)
+	(const_int 0))
+   (set (strict_low_part (match_dup 2))
+	(match_dup 3))]
+  "operands[2] = gen_rtx_REG (QImode, REGNO (operands[0]));
+   operands[3] = gen_rtx_REG (QImode, REGNO (operands[1]));")
+
 ;; (compare (reg:SI) (const_int)) takes 6 bytes, so we try to achieve
 ;; the equivalent with shorter sequences.  Here is the summary.  Cases
 ;; are grouped for each define_peephole2.