a) Moved DPL, DPH, DPX & B before XREGn . ralloc.c/ralloc.h

b) Changed saveRBank & unsaveRBank routines to save & restore R0-R7 only

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@1653 4a8a32a2-be11-0410-ad9d-d568d2c75423

diff --git a/src/ds390/gen.c b/src/ds390/gen.c
index cc4aab1148a008d3205fd0a60a5c533f835d0839..d01c1d7e1396d269e28e7fb0f8fe295bc33e1539 100644 (file)
--- a/src/ds390/gen.c
+++ b/src/ds390/gen.c
@@ -2160,7 +2160,7 @@ unsaveRBank (int bank, iCode * ic, bool popPsw)
       }
     }
 
-  for (i = (ds390_nRegs - 1); i >= 0; i--)
+  for (i = 7; i >= 0; i--) /* only R7-R0 needs to be popped */
     {
       if (options.useXstack)
        {
@@ -2211,7 +2211,7 @@ saveRBank (int bank, iCode * ic, bool pushPsw)
         emitcode ("mov", "%s,_spx", r->name);    
     }
 
-  for (i = 0; i < ds390_nRegs; i++)
+  for (i = 0; i < 8 ; i++) /* only R0-R7 needs saving */
     {
       if (options.useXstack)
        {

diff --git a/src/ds390/ralloc.c b/src/ds390/ralloc.c
index cf85879e36b8edf5da4655b1ddacf117ac5db345..8722a5c9be145231a3676c81bbc7a6b3b214ae14 100644 (file)
--- a/src/ds390/ralloc.c
+++ b/src/ds390/ralloc.c
@@ -68,16 +68,16 @@ regs regs390[] =
   {REG_GPR, R7_IDX, REG_GPR, "r7", "ar7", "0", 7, 1, 1},
   {REG_PTR, R0_IDX, REG_PTR, "r0", "ar0", "0", 0, 1, 1},
   {REG_PTR, R1_IDX, REG_PTR, "r1", "ar1", "0", 1, 1, 1},
+  {REG_GPR, DPL_IDX, REG_GPR, "dpl", "dpl", "dpl", 0, 0, 0},
+  {REG_GPR, DPH_IDX, REG_GPR, "dph", "dph", "dph", 0, 0, 0},
+  {REG_GPR, DPX_IDX, REG_GPR, "dpx", "dpx", "dpx", 0, 0, 0},
+  {REG_GPR, B_IDX, REG_GPR, "b", "b", "b", 0, 0, 0},
   {REG_GPR, X8_IDX, REG_GPR, "x8", "x8", "xreg", 0, 0, 0},
   {REG_GPR, X9_IDX, REG_GPR, "x9", "x9", "xreg", 1, 0, 0},
   {REG_GPR, X10_IDX, REG_GPR, "x10", "x10", "xreg", 2, 0, 0},
   {REG_GPR, X11_IDX, REG_GPR, "x11", "x11", "xreg", 3, 0, 0},
   {REG_GPR, X12_IDX, REG_GPR, "x12", "x12", "xreg", 4, 0, 0},
   {REG_CND, CND_IDX, REG_GPR, "C", "C", "xreg", 0, 0, 0},
-  {REG_GPR, DPL_IDX, REG_GPR, "dpl", "dpl", "dpl", 0, 0, 0},
-  {REG_GPR, DPH_IDX, REG_GPR, "dph", "dph", "dph", 0, 0, 0},
-  {REG_GPR, DPX_IDX, REG_GPR, "dpx", "dpx", "dpx", 0, 0, 0},
-  {REG_GPR, B_IDX, REG_GPR, "b", "b", "b", 0, 0, 0},
 };
 int ds390_nRegs = 13;
 static void spillThis (symbol *);
@@ -2702,7 +2702,7 @@ ds390_assignRegisters (eBBlock ** ebbs, int count)
   setToNull ((void *) &_G.totRegAssigned);  
   setToNull ((void *) &_G.funcrUsed);  
   ds390_ptrRegReq = _G.stackExtend = _G.dataExtend = 0;
-  ds390_nRegs = 18;
+  ds390_nRegs = 12;
   if (options.model != MODEL_FLAT24) options.stack10bit = 0;
   /* change assignments this will remove some
      live ranges reducing some register pressure */
@@ -2722,7 +2722,7 @@ ds390_assignRegisters (eBBlock ** ebbs, int count)
   ds390_nRegs = 8;
   freeAllRegs ();
   fillGaps();
-  ds390_nRegs = 18;
+  ds390_nRegs = 12;
 
   /* if stack was extended then tell the user */
   if (_G.stackExtend)

diff --git a/src/ds390/ralloc.h b/src/ds390/ralloc.h
index a2206fa6c1017fdc90f35168f65393e84dbefa45..4e6116c36dd51173200956b7674017311554e210 100644 (file)
--- a/src/ds390/ralloc.h
+++ b/src/ds390/ralloc.h
@@ -31,10 +31,10 @@ enum
   {
     R2_IDX = 0, R3_IDX, R4_IDX,
     R5_IDX, R6_IDX, R7_IDX,
-    R0_IDX, R1_IDX, X8_IDX,
+    R0_IDX, R1_IDX, DPL_IDX, 
+    DPH_IDX, DPX_IDX, B_IDX, X8_IDX,
     X9_IDX, X10_IDX, X11_IDX,
-    X12_IDX, CND_IDX, DPL_IDX, 
-    DPH_IDX, DPX_IDX, B_IDX
+    X12_IDX, CND_IDX 
   };