From: johanknol <johanknol@4a8a32a2-be11-0410-ad9d-d568d2c75423>
Date: Sun, 3 Jun 2001 16:33:27 +0000 (+0000)
Subject: comitted Bernhard's peephole 182a
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=6c1ca597378b3b0f7b5bcbf3d421528f5a1a7eb9;p=fw%2Fsdcc

comitted Bernhard's peephole 182a


git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@866 4a8a32a2-be11-0410-ad9d-d568d2c75423
---

diff --git a/src/mcs51/peeph.def b/src/mcs51/peeph.def
index fd7f2cf5..64bf597e 100644
--- a/src/mcs51/peeph.def
+++ b/src/mcs51/peeph.def
@@ -1036,6 +1036,16 @@ replace {
         mov  dptr,#0x0000
 }
 
+// saving 3 bytes, 2 cycles
+// provided by Bernhard Held <bernhard.held@de.westinghouse.com>
+replace {
+	mov dpl,#%1
+	mov dph,#(%1 >> 8)
+} by {
+	; Peephole 182a use 16 bit load of DPTR
+	mov dptr,#%1
+}
+
 // saving 3 byte, 2 cycles, return(float_constant) profits here
 replace {
         mov  dpl,#%1