ppc: kleinere spielerein bezueglich stack

folgende Testfaelle gehen noch nicht:
codeb_georg_asm{a,b}*
codeb_intelli_14.0
old_abgabe_cf.0
skinner33_01.0 # vermutlich selbes problem wie bei cf, sehr komisches verhalten!

diff --git a/gesamt_ppc/code.bfe b/gesamt_ppc/code.bfe
index e9234f919d69447f5daf866b9550dee44c3eaa02..f97b517b3ef6ccd0997d7977a44437d328226340 100644 (file)
--- a/gesamt_ppc/code.bfe
+++ b/gesamt_ppc/code.bfe
@@ -199,14 +199,20 @@ void assign_var(struct treenode *bnode)
        printf("\tsubi %s,%s,%d\n", KID_REG(1), KID_REG(1), KIDKID_VAL(0,1));
 }
 
+/* ... dirty */
+static short sc[8] = {0};
 void make_call(struct treenode *bnode)
 {
        int j;
        printf("\t#params pushen\n");
        for(j = 0; j < bnode->soffset; j++) {
-               printf("\tlwz 20,%d(1)\n", j*4);
-               printf("\tstw %s,%d(1)\n", param_reg(j), j*4);
-               printf("\tmr %s,20\n", param_reg(j));
+               if(sc[j] == 1) {
+                       printf("\tlwz 20,%d(1)\n", j*4);
+                       printf("\tstw %s,%d(1)\n", param_reg(j), j*4);
+                       printf("\tmr %s,20\n", param_reg(j));
+               } else if (sc[j] == 0) {
+                       printf("\tstw %s,%d(1)\n", param_reg(j), j*4);
+               }
        }
        printf("\t#vars pushen\n");
        for(j = bnode->soffset; j < bnode->soffset + bnode->vars; j++) {
@@ -245,14 +251,24 @@ void make_call(struct treenode *bnode)
        }
 
        printf("\t#params poppen\n");
+       for(j = bnode->soffset - 1; j >= 0; j--) {
+               if(sc[j] == 0)
+                       printf("\tlwz %s,%d(1)\n", param_reg(j), j*4);
+       }
        for(j = 0; j < bnode->soffset; j++) {
-               printf("\tlwz %s,%d(1)\n", param_reg(j), j*4);
+               if(sc[j] > 0)
+                       printf("\tlwz %s,%d(1)\n", param_reg(j), j*4);
        }
+
+       /* clear stack control array */
+       for(j = 0; j < sizeof sc / sizeof sc[0]; j++)
+               sc[j] = 0;
 }
 
 void prep_arg(struct treenode *bnode, int moveit)
 {
        printf("\t#args-nr-> %i (%%%s) [moveit= %i]\n", bnode->soffset, param_reg(bnode->soffset), moveit);
+       sc[bnode->soffset] = 1;
        if(moveit) { /* expr */
                if((BN_REG == (char *) NULL) || (bnode->kids[1] != TREENULL && bnode->kids[1]->op == O_ID && bnode->kids[1]->kids[0] == TREENULL && bnode->kids[1]->kids[1] == TREENULL)) {
                        if(bnode->kids[1]->name != (char *) NULL && strcmp(bnode->kids[1]->name,"this")!=0) {
@@ -260,6 +276,7 @@ void prep_arg(struct treenode *bnode, int moveit)
                                printf("\tstw %s,%d(1)\n", KID_REG(1),bnode->soffset*4);
                        } else {
                                printf("\tstw %s,%d(1)\n", param_reg(bnode->soffset), bnode->soffset*4);
+                               sc[bnode->soffset] = 2;
                        }
                } else {
                        printf("\tstw %s,%d(1)\n", BN_REG, bnode->soffset*4);