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;; Parting out the big math/logic routines from the
;; instruction dispatch table.
alu_sbc:
;; SBC instruction
;; SBC d1,d0
;; d1 - (d0+C) -> d1
;; sets flags
push.l d2
bsr flags_normalize
move.b flag_byte(pc),d2
andi.b #1,d2
add.b d0,d2
move.b d2,(f_tmp_src_b-flag_storage)(a3)
move.b d1,(f_tmp_dst_b-flag_storage)(a3)
sub.b d2,d1
move sr,(f_host_sr-flag_storage)(a3)
move.w #$0202,(flag_byte-flag_storage)(a3)
pop.l d2
rts
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