X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fizt%2Fgen_generic.c;h=e0618e43ed3463b3614683d1ac2c092271171331;hb=ed1f876ebb23b623bcf60329dfe3f4682e7ca184;hp=576fd08a29a6382d7e82b2eaddd10af4a7622c96;hpb=8b194ce521ec1d8a69f019f1b286a0a1c8ff2343;p=fw%2Fsdcc

diff --git a/src/izt/gen_generic.c b/src/izt/gen_generic.c
index 576fd08a..e0618e43 100644
--- a/src/izt/gen_generic.c
+++ b/src/izt/gen_generic.c
@@ -1,6 +1,55 @@
 #include "izt.h"
 #include "gen.h"
 
+static void _setupPointer(REG *reg, asmop *into, int offset)
+{
+    iemit("; _setupPointer for %s", reg->name);
+}
+
+void izt_putAop(asmop *into, const char *sz, int size, int offset)
+{
+    wassert(offset == 0);
+
+    switch (into->type) {
+    case AOP_TYPE_REG:
+	iemit("mov %s,%s", into->u.reg->name, sz);
+	break;
+    case AOP_TYPE_CARRY:
+	// Should support.
+	wassert(0);
+	break;
+
+    case AOP_TYPE_SCRATCH_PTR:
+	_setupPointer(izt_port->scratch, into, offset);
+	iemit("mov a,%s", sz);
+	iemit("mov %s,a", izt_port->scratch->name);
+	break;
+
+    case AOP_TYPE_STACK:
+	iemit("mov a,%s", sz);
+	iemit("mov (%s+%d),a", izt_port->base_ptr->name, into->u.stack);
+	break;
+
+    case AOP_TYPE_LITERAL:
+    case AOP_TYPE_IMMEDIATE:
+    default:
+	wassert(0);
+    }
+}
+
+char *izt_getAop(asmop *from, int size, int offset)
+{
+    return "blah";
+}
+
+/** Perform a generic move operation.
+ */
+static void _mov(asmop *into, asmop *from)
+{
+    int size = into->size;
+    izt_putAop(into, izt_getAop(from, size, 0), size, 0);
+}
+
 static void _genLabel(iCode *ic)
 {
     iemit("!tlabeldef", IC_LABEL(ic)->key + 100);
@@ -22,23 +71,38 @@ static void _genFunction(iCode *ic)
     if (sym->stack) {
 	iemit("!enterx", sym->stack);
     }
-    else {
-	iemit("!enter");
+  else
+    {
+      iemit ("!enter");
     }
 }
 
-static void _genReturn(iCode *ic)
+static void _genEndFunction(iCode *ic)
+{
+    //    symbol *sym = OP_SYMBOL(IC_LEFT(ic));
+
+    /* PENDING: calleeSave */
+
+    iemit("!leave");
+    iemit("ret");
+}
+
+static void
+_genReturn (iCode * ic)
 {
     if (IC_LEFT(ic)) {
 	// Has a return value.  Load it up.
-	iemit("; PENDING: call the generic loader to setup the return value.");
+	izt_bindAop(IC_LEFT(ic), ic);
+	_mov(izt_getAopForReturn(AOP_SIZE(IC_LEFT(ic))), AOP(IC_LEFT(ic)));
     }
 
-    if (ic->next && ic->next->op == LABEL && IC_LABEL(ic->next) == returnLabel) {
-	// The next label is the return label.  Dont bother emitting a jump.
+  if (ic->next && ic->next->op == LABEL && IC_LABEL (ic->next) == returnLabel)
+    {
+      // The next label is the return label.  Dont bother emitting a jump.
     }
-    else {
-	iemit("jp !tlabel", returnLabel->key+100);
+  else
+    {
+      iemit ("jp !tlabel", returnLabel->key + 100);
     }
 }
 
@@ -47,10 +111,12 @@ static EMITTER _base_emitters[] = {
     { GOTO,		_genGoto },
     { FUNCTION,		_genFunction },
     { RETURN,		_genReturn },
+    { ENDFUNCTION,	_genEndFunction },
     { 0,		NULL }
 };
 
-void izt_initBaseEmitters(hTab **into)
+void
+izt_initBaseEmitters (hTab ** into)
 {
-    izt_addEmittersToHTab(into, _base_emitters);
+  izt_addEmittersToHTab (into, _base_emitters);
 }