Minor optimization

git-svn-id: svn://svn.cc65.org/cc65/trunk@45 b7a2c559-68d2-44c3-8de9-860c34a00d81

diff --git a/libsrc/runtime/bneg.s b/libsrc/runtime/bneg.s
index 034d716c96558f12c48d372f4a87f6457ee2a8e2..8f488f9c1972bbc0df14a698e6c17192030e3af7 100644 (file)
--- a/libsrc/runtime/bneg.s
+++ b/libsrc/runtime/bneg.s
@@ -9,10 +9,9 @@
 
 bnegax:        cpx     #0
        bne     L0
-bnega: cmp     #0
+bnega:         tax
        bne     L0
-L1:    ldx     #0
-       lda     #1
+L1:    lda     #1              ; Zero already in X
        rts
 
 L0:    ldx     #0