X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fmcs51%2Fpeeph.def;h=64bf597ee2009c93302aa1bfc3367c7961fa7b4d;hb=77037e3743d15f7bc5cc15576500796f3a1ce5f7;hp=b089c32a901a31fa4cf78a21f8f94b44c3fb2170;hpb=e94d9ac435674d646bdc6aed4ceb65dd8ebd9ef7;p=fw%2Fsdcc

diff --git a/src/mcs51/peeph.def b/src/mcs51/peeph.def
index b089c32a..64bf597e 100644
--- a/src/mcs51/peeph.def
+++ b/src/mcs51/peeph.def
@@ -70,7 +70,6 @@ replace {
         mov  dptr,#%2
         movx @dptr,a
 }
-
 replace {
 	mov  a,acc
 } by {
@@ -539,20 +538,6 @@ replace {
         orl  a,r%2
 }
 
-replace {
-        mov  %1,a
-        mov  dpl,%2
-        mov  dph,%3
-	mov  dpx,%4
-        mov  a,%1
-} by {
-        ; Peephole 136a   removed redundant moves
-        mov  %1,a
-        mov  dpl,%2
-        mov  dph,%3
-	mov  dpx,%4
-} if 24bitMode
-
 replace {
         mov  %1,a
         mov  dpl,%2
@@ -1004,13 +989,14 @@ replace {
         mov  %1,@r%2
 }
 
-replace {
-        mov  %1,%2
-        mov  %2,%1
-} by {
-        ; Peephole 177   removed redundant mov
-        mov  %1,%2
-}
+// this one will screw assignes to volatile/sfr's
+//replace {
+//        mov  %1,%2
+//        mov  %2,%1
+//} by {
+//        ; Peephole 177   removed redundant mov
+//        mov  %1,%2
+//}
 
 replace {
         mov  a,%1
@@ -1041,15 +1027,6 @@ replace {
         clr  a
 }
 
-replace {
-        mov  dpl,#0x00
-        mov  dph,#0x00
- 	mov  dpx,#0x00
-} by {
-        ; Peephole 181a   used 24 bit load of dptr
-        mov  dptr,#0x0000
-} if 24bitMode
-
 // saving 3 byte, 2 cycles, return(NULL) profits here
 replace {
         mov  dpl,#0x00
@@ -1059,15 +1036,15 @@ replace {
         mov  dptr,#0x0000
 }
 
-// saves 2 bytes, ?? cycles.
+// saving 3 bytes, 2 cycles
+// provided by Bernhard Held <bernhard.held@de.westinghouse.com>
 replace {
-        mov  dpl,#%1
-        mov  dph,#(%1 >> 8)
-	mov  dpx,#(%1 >> 16)
+	mov dpl,#%1
+	mov dph,#(%1 >> 8)
 } by {
-        ; Peephole 182a   used 24 bit load of dptr
-        mov  dptr,#%1
-} if 24bitMode
+	; Peephole 182a use 16 bit load of DPTR
+	mov dptr,#%1
+}
 
 // saving 3 byte, 2 cycles, return(float_constant) profits here
 replace {
@@ -1608,13 +1585,6 @@ replace {
         inc  %1
 }
 
-replace {
-        mov  dptr,#((((%1 >> 16)) <<16) + (((%1 >> 8)) <<8) + %1)
-} by {
-        ; Peephole 210a   simplified expression
-        mov  dptr,#%1
-} if 24bitMode
-
 replace {
         mov  dptr,#((((%1 >> 8)) <<8) + %1)
 } by {
@@ -1802,13 +1772,3 @@ replace {
 } by {
 	; removed dec/inc pair
 }
-
-replace {
-	mov     dps, #0x00
-	mov     dp%1,a
-	mov     dps, #0x01
-} by {
-	; Peephole 222 removed DPS abuse.
-	mov     dp%1,a
-        mov     dps, #0x01
-}