following up, theres my naive fix for this. instead of
emiting conditional division instruction by 5c... dont and
keep the branch. does this make any sense?
term% hg diff -r 1777 peep.c
diff -r 5eeb36d3ddd0 sys/src/cmd/5c/peep.c
--- a/sys/src/cmd/5c/peep.c Mon Jul 30 19:11:16 2012 +0200
+++ b/sys/src/cmd/5c/peep.c Mon Apr 29 20:51:12 2013 +0200
@@ -1354,6 +1354,15 @@
j->end = r->s2;
return Branch;
}
+ switch(r->prog->as){
+ case ADIV:
+ case ADIVU:
+ case AMOD:
+ case AMODU:
+ /* emulated by 5l, doesnt handle conditionals */
+ j->end = r->s1;
+ return Toolong;
+ }
if (modifiescpsr(r->prog)) {
j->end = r->s1;
return Setcond;
--
cinap
