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cc65/libsrc/runtime/ldaxsp.s

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;
; Ullrich von Bassewitz, 31.08.1998
;
; CC65 runtime: Load ax from offset in stack
;
.export ldax0sp, ldaxysp
.importzp sp
; Beware: The optimizer knows about the value in Y after return!
ldax0sp:
ldy #1
ldaxysp:
lda (sp),y ; get high byte
tax ; and save it
dey ; point to lo byte
lda (sp),y ; load low byte
rts