X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fz80%2Fgen.c;h=ff07195b9d6a0a9eebe9d89c28075ad4f00b7618;hb=871e6c6aefc06309a03c295ce0d3c9d4bbb4a742;hp=2ef191da5a0f8b66ab8c8db4dd50a3756480d224;hpb=5948fe48b6494da15546dfe936e6507055d6e16d;p=fw%2Fsdcc

diff --git a/src/z80/gen.c b/src/z80/gen.c
index 2ef191da..ff07195b 100644
--- a/src/z80/gen.c
+++ b/src/z80/gen.c
@@ -3994,7 +3994,12 @@ genPlus (iCode * ic)
     {
       _moveA (aopGet (AOP (IC_LEFT (ic)), offset, FALSE));
       if (offset == 0)
-        emit2 ("add a,%s", aopGet (AOP (IC_RIGHT (ic)), offset, FALSE));
+      {
+        if(size == 0 && AOP_TYPE (IC_RIGHT (ic)) == AOP_LIT && ulFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit) == 1)
+	  emit2 ("inc a");
+        else
+          emit2 ("add a,%s", aopGet (AOP (IC_RIGHT (ic)), offset, FALSE));
+      }
       else
         emit2 ("adc a,%s", aopGet (AOP (IC_RIGHT (ic)), offset, FALSE));
       aopPut (AOP (IC_RESULT (ic)), "a", offset++);
@@ -4215,6 +4220,72 @@ release:
   freeAsmop (IC_RESULT (ic), NULL, ic);
 }
 
+/*-----------------------------------------------------------------*/
+/* genMultChar - generates code for unsigned 8x8 multiplication    */
+/*-----------------------------------------------------------------*/
+static void
+genMultOneChar (iCode * ic)
+{
+  symbol *tlbl1, *tlbl2;
+  bool savedB = FALSE;
+
+  if(IS_GB)
+    {
+      wassertl (0, "Multiplication is handled through support function calls on gbz80");
+      return;
+    }
+
+  /* Save b into a if b is in use. */
+  if (bitVectBitValue (ic->rMask, B_IDX) &&
+    !(getPairId (AOP (IC_RESULT (ic))) == PAIR_BC))
+    {
+      emit2 ("ld a, b");
+      savedB = TRUE;
+    }
+  if (isPairInUse (PAIR_DE, ic) &&
+    !(getPairId (AOP (IC_RESULT (ic))) == PAIR_DE))
+  {
+    _push (PAIR_DE);
+    _G.stack.pushedDE = TRUE;
+  }
+
+  tlbl1 = newiTempLabel (NULL);
+  tlbl2 = newiTempLabel (NULL);
+
+  emit2 ("ld e,%s", aopGet (AOP (IC_RIGHT (ic)), LSB, FALSE));
+  emit2 ("ld h,%s", aopGet (AOP (IC_LEFT (ic)), LSB, FALSE));
+  emit2 ("ld l,#0x00");
+  emit2 ("ld d,l");
+  emit2 ("ld b,#0x08");
+  emitLabel (tlbl1->key + 100);
+  emit2 ("add hl,hl");
+  emit2 ("jp NC,!tlabel", tlbl2->key + 100);
+  emit2 ("add hl,de");
+  emitLabel (tlbl2->key + 100);
+  emit2 ("djnz !tlabel", tlbl1->key + 100);
+
+  spillPair(PAIR_HL);
+
+  if (IS_Z80 && _G.stack.pushedDE)
+    {
+      _pop (PAIR_DE);
+      _G.stack.pushedDE = FALSE;
+    }
+  if (savedB)
+    {
+      emit2 ("ld b, a");
+    }
+
+  if (AOP_SIZE (IC_RESULT (ic)) == 1)
+    aopPut (AOP (IC_RESULT (ic)), "l", 0);
+  else
+    commitPair ( AOP (IC_RESULT (ic)), PAIR_HL);
+
+  freeAsmop (IC_LEFT (ic), NULL, ic);
+  freeAsmop (IC_RIGHT (ic), NULL, ic);
+  freeAsmop (IC_RESULT (ic), NULL, ic);
+}
+
 /*-----------------------------------------------------------------*/
 /* genMult - generates code for multiplication                     */
 /*-----------------------------------------------------------------*/
@@ -4249,6 +4320,12 @@ genMult (iCode * ic)
       IC_LEFT (ic) = t;
     }
 
+  if (AOP_TYPE (IC_RIGHT (ic)) != AOP_LIT)
+    {
+      genMultOneChar (ic);
+      return;
+    }
+
   wassertl (AOP_TYPE (IC_RIGHT (ic)) == AOP_LIT, "Right must be a literal");
 
   val = (int) ulFromVal ( AOP (IC_RIGHT (ic))->aopu.aop_lit);
@@ -4787,13 +4864,16 @@ genCmpGt (iCode * ic, iCode * ifx)
   letype = getSpec (operandType (left));
   retype = getSpec (operandType (right));
   sign = !(SPEC_USIGN (letype) | SPEC_USIGN (retype));
-  /* assign the amsops */
+  /* assign the asmops */
   aopOp (left, ic, FALSE, FALSE);
   aopOp (right, ic, FALSE, FALSE);
   aopOp (result, ic, TRUE, FALSE);
 
+  setupToPreserveCarry (ic);
+
   genCmp (right, left, result, ifx, sign);
 
+  _G.preserveCarry = FALSE;
   freeAsmop (left, NULL, ic);
   freeAsmop (right, NULL, ic);
   freeAsmop (result, NULL, ic);
@@ -4817,13 +4897,16 @@ genCmpLt (iCode * ic, iCode * ifx)
   retype = getSpec (operandType (right));
   sign = !(SPEC_USIGN (letype) | SPEC_USIGN (retype));
 
-  /* assign the amsops */
+  /* assign the asmops */
   aopOp (left, ic, FALSE, FALSE);
   aopOp (right, ic, FALSE, FALSE);
   aopOp (result, ic, TRUE, FALSE);
 
+  setupToPreserveCarry (ic);
+
   genCmp (left, right, result, ifx, sign);
 
+  _G.preserveCarry = FALSE;
   freeAsmop (left, NULL, ic);
   freeAsmop (right, NULL, ic);
   freeAsmop (result, NULL, ic);
@@ -7493,8 +7576,7 @@ genCast (iCode * ic)
   else
     {
       /* we need to extend the sign :{ */
-        const char *l = aopGet (AOP (right), AOP_SIZE (right) - 1,
-                        FALSE);
+      const char *l = aopGet (AOP (right), AOP_SIZE (right) - 1, FALSE);
       _moveA (l);
       emit2 ("rla ");
       emit2 ("sbc a,a");
@@ -7922,67 +8004,12 @@ _swap (PAIR_ID one, PAIR_ID two)
     }
 }
 
-/* The problem is that we may have all three pairs used and they may
-   be needed in a different order.
-
-   Note: Have ex de,hl
-
-   Combinations:
-     hl = hl            => unity, fine
-     bc = bc
-     de = de
-
-     hl = hl            hl = hl, swap de <=> bc
-     bc = de
-     de = bc
-
-     hl = bc            Worst case
-     bc = de
-     de = hl
-
-     hl = bc            de = de, swap bc <=> hl
-     bc = hl
-     de = de
-
-     hl = de            Worst case
-     bc = hl
-     de = bc
-
-     hl = de            bc = bc, swap hl <=> de
-     bc = bc
-     de = hl
-
-   Break it down into:
-    * Any pair = pair are done last
-    * Any pair = iTemp are done last
-    * Any swaps can be done any time
-
-   A worst case:
-    push p1
-    p1 = p2
-    p2 = p3
-    pop  p3
-
-   So how do we detect the cases?
-   How about a 3x3 matrix?
-        source
-   dest x x x x
-        x x x x
-        x x x x (Fourth for iTemp/other)
-
-   First determin which mode to use by counting the number of unity and
-   iTemp assigns.
-     Three - any order
-     Two - Assign the pair first, then the rest
-     One - Swap the two, then the rest
-     Zero - Worst case.
-*/
 static void
-setupForBuiltin3 (iCode *ic, int nparams, operand **pparams)
+setupForMemcpy (iCode *ic, int nparams, operand **pparams)
 {
   PAIR_ID ids[NUM_PAIRS][NUM_PAIRS];
   PAIR_ID dest[3] = {
-    PAIR_BC, PAIR_HL, PAIR_DE
+    PAIR_DE, PAIR_HL, PAIR_BC
   };
   int i, j, nunity = 0;
   memset (ids, PAIR_INVALID, sizeof (ids));
@@ -7990,10 +8017,6 @@ setupForBuiltin3 (iCode *ic, int nparams, operand **pparams)
   /* Sanity checks */
   wassert (nparams == 3);
 
-  /* First save everything that needs to be saved. */
-  _saveRegsForCall (ic, 0);
-
-  /* Loading HL first means that DE is always fine. */
   for (i = 0; i < nparams; i++)
     {
       aopOp (pparams[i], ic, FALSE, FALSE);
@@ -8015,7 +8038,7 @@ setupForBuiltin3 (iCode *ic, int nparams, operand **pparams)
     }
   else if (nunity == 2)
     {
-      /* One is assigned.  Pull it out and assign. */
+      /* Two are OK.  Assign the other one. */
       for (i = 0; i < 3; i++)
         {
           for (j = 0; j < NUM_PAIRS; j++)
@@ -8038,7 +8061,7 @@ setupForBuiltin3 (iCode *ic, int nparams, operand **pparams)
     }
   else if (nunity == 1)
     {
-      /* Find the pairs to swap. */
+      /* One is OK. Find the other two. */
       for (i = 0; i < 3; i++)
         {
           for (j = 0; j < NUM_PAIRS; j++)
@@ -8047,12 +8070,22 @@ setupForBuiltin3 (iCode *ic, int nparams, operand **pparams)
                 {
                   if (j == PAIR_INVALID || j == dest[i])
                     {
-                      /* Keep looking. */
+                      /* This one is OK. */
                     }
                   else
                     {
-                      _swap (j, dest[i]);
-                      goto done;
+                      /* Found one. */
+                      if(ids[j][dest[i]] == TRUE)
+                        {
+                          /* Just swap. */
+                           _swap (j, dest[i]);
+                           goto done;
+                        }
+                      else
+                        {
+                          fetchPair (dest[i], AOP (pparams[i]));
+                          continue;
+                        }         
                     }
                 }
             }
@@ -8086,53 +8119,27 @@ setupForBuiltin3 (iCode *ic, int nparams, operand **pparams)
     }
 }
 
-static void
-genBuiltInStrcpy (iCode *ic, int nParams, operand **pparams)
-{
-  operand *from, *to;
-  symbol *label;
-  bool deInUse;
-
-  wassertl (nParams == 2, "Built-in strcpy must have two parameters");
-  to = pparams[0];
-  from = pparams[1];
-
-  deInUse = bitVectBitValue (ic->rMask, D_IDX) || bitVectBitValue(ic->rMask, E_IDX);
-
-  setupForBuiltin3 (ic, nParams, pparams);
-
-  label = newiTempLabel(NULL);
-
-  emitLabel (label->key);
-  emit2 ("ld a,(hl)");
-  emit2 ("ldi");
-  emit2 ("or a");
-  emit2 ("!shortjp NZ,!tlabel ; 1", label->key);
-
-  freeAsmop (from, NULL, ic->next);
-  freeAsmop (to, NULL, ic);
-}
-
 static void
 genBuiltInMemcpy (iCode *ic, int nParams, operand **pparams)
 {
   operand *from, *to, *count;
-  bool deInUse;
 
-  wassertl (nParams == 3, "Built-in memcpy must have two parameters");
+  wassertl (nParams == 3, "Built-in memcpy() must have three parameters");
   to = pparams[2];
   from = pparams[1];
   count = pparams[0];
 
-  deInUse = bitVectBitValue (ic->rMask, D_IDX) || bitVectBitValue(ic->rMask, E_IDX);
+  _saveRegsForCall (ic, 0);
 
-  setupForBuiltin3 (ic, nParams, pparams);
+  setupForMemcpy (ic, nParams, pparams);
 
   emit2 ("ldir");
 
   freeAsmop (count, NULL, ic->next->next);
   freeAsmop (from, NULL, ic);
 
+  spillPair (PAIR_HL);
+
   _restoreRegsAfterCall();
 
   /* if we need assign a result value */
@@ -8166,11 +8173,7 @@ static void genBuiltIn (iCode *ic)
     /* which function is it */
     bif = OP_SYMBOL(IC_LEFT(bi_iCode));
 
-    if (strcmp(bif->name,"__builtin_strcpy")==0)
-      {
-        genBuiltInStrcpy(bi_iCode, nbi_parms, bi_parms);
-      }
-    else if (strcmp(bif->name,"__builtin_memcpy")==0)
+    if (strcmp(bif->name,"__builtin_memcpy")==0)
       {
         genBuiltInMemcpy(bi_iCode, nbi_parms, bi_parms);
       }