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Save a few bytes and cycles.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4707 b7a2c559-68d2-44c3-8de9-860c34a00d81
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uz 2010-06-04 09:38:35 +00:00
parent 75fbc5c5e3
commit 23901280c9
1 changed files with 4 additions and 8 deletions
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12
libsrc/common/oserrcheck.s
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@ -16,17 +16,13 @@
.proc oserrcheck
sta __oserror ; Store the error code
tay ; Did we have an error?
tax ; Did we have an error?
beq ok ; Branch if no
jsr __osmaperrno ; Map os error into errno code
sta __errno
stx __errno+1 ; Save in errno
jsr __seterrno ; Save in errno
lda #$FF ; Return -1
; Error free, A contains zero
ok: tax ; Make high byte also zero
rts
tax ; Make high byte also zero
ok: rts
.endproc