shithub: mc

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Move values in/out of fixed regs

    We want to be able to use these regs!

--- a/8/isel.c

+++ b/8/isel.c

@@ -374,7 +374,7 @@

 Loc *selexpr(Isel *s, Node *n)

 {

-    Loc *a, *b, *c, *r;

+    Loc *a, *b, *c, *d, *r;

     Loc *eax, *edx, *cl; /* x86 wanst some hard-coded regs */

     Node **args;

@@ -395,9 +395,10 @@

             b = selexpr(s, args[1]);

             b = inr(s, b);

             c = coreg(Reax, mode(n));

+            r = locreg(a->mode);

             g(s, Imov, a, c, NULL);

             g(s, Imul, b, NULL);

-            r = eax;

+            g(s, Imov, eax, r, NULL);

             break;

         case Odiv:

         case Omod:

@@ -406,13 +407,15 @@

             b = selexpr(s, args[1]);

             b = inr(s, b);

             c = coreg(Reax, mode(n));

+            r = locreg(a->mode);

             g(s, Imov, a, c, NULL);

             g(s, Ixor, edx, edx, NULL);

             g(s, Idiv, b, NULL);

             if (exprop(n) == Odiv)

-                r = eax;

+                d = eax;

             else

-                r = edx;

+                d = edx;

+            g(s, Imov, d, r, NULL);

             break;

         case Oneg:

             r = selexpr(s, args[0]);