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Just use 'movs' for all blits. It's faster anwyays.

--- a/6/isel.c

+++ b/6/isel.c

@@ -353,22 +353,8 @@

 static void blit(Isel *s, Loc *to, Loc *from, size_t dstoff, size_t srcoff, size_t sz)

 {

-    AsmOp op;

     Loc *sp, *dp, *len; /* pointers to src, dst */

-    if (sz % 8 == 0) {

-        sz /= 8;

-        op = Irepmovsq;

-    } else if (sz % 4 == 0) {

-        sz /= 4;

-        op = Irepmovsl;

-    } else if (sz % 2 == 0) {

-        sz /= 2;

-        op = Irepmovsw;

-    } else {

-        op = Irepmovsb;

-    }

-

     len = loclit(sz, ModeQ);

     sp = inr(s, from);

     dp = inr(s, to);

@@ -385,7 +371,7 @@

         g(s, Ilea, locmem(dstoff, dp, NULL, ModeQ), locphysreg(Rrdi), NULL);

     else

         g(s, Imov, dp, locphysreg(Rrdi), NULL);

-    g(s, op, NULL);

+    g(s, Irepmovsb, NULL);

 }

 static Loc *gencall(Isel *s, Node *n)