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cc65/libsrc/runtime/lsave.s
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378 B
ArmAsm

;
; Ullrich von Bassewitz, 08.08.1998
;
; CC65 runtime: save ax into temp storage/restore ax from temp storage
;
.export saveeax, resteax
.importzp sreg, regsave
saveeax:
sta regsave
stx regsave+1
lda sreg
sta regsave+2
lda sreg+1
sta regsave+3
lda regsave
rts
resteax:
lda regsave+3
sta sreg+1
lda regsave+2
sta sreg
ldx regsave+1
lda regsave
rts