Implemented day 3

Note that only part 1 has been implemented. The reasoning is on the file
header. Moreover, we are not printing 24-bit results yet because that
would entail modifying the somewhat terrifying vendor code on
`vendor/bcd16.s`. Since this will be a recurring theme, I guess that I
will have to come up with a solution sooner or later.

Signed-off-by: Miquel Sabaté Solà <msabate@suse.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/2.s b/src/2.s
index 353cb16..78b068e 100644
--- a/src/2.s
+++ b/src/2.s
@@ -138,7 +138,10 @@
 
 @end:
     ;; Run tests now that everything has been done.
-    CALL_TESTS_ON_DONE
+.ifdef RUN_TESTS
+@test:
+    nop
+.endif
 @halt:
     jmp @halt
 .endproc