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;--------------------------------------------------------------------------
; _mulint.s
;
; Copyright (C) 2014-2015, Krzysztof Nikiel, Ben Shi, Philipp Klaus Krause
;
; This library is free software; you can redistribute it and/or modify it
; under the terms of the GNU General Public License as published by the
; Free Software Foundation; either version 2, or (at your option) any
; later version.
;
; This library is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this library; see the file COPYING. If not, write to the
; Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
; MA 02110-1301, USA.
;
; As a special exception, if you link this library with other files,
; some of which are compiled with SDCC, to produce an executable,
; this library does not by itself cause the resulting executable to
; be covered by the GNU General Public License. This exception does
; not however invalidate any other reasons why the executable file
; might be covered by the GNU General Public License.
;--------------------------------------------------------------------------
.globl __mulint
.area CODE
__mulint:
ldw x, (#3, sp)
ld a, (#6, sp)
mul x, a
pushw x
ldw x, (#4, sp)
mul x, a
ld a, xl
add a, (#1, sp)
ld (#1, sp), a
ldw x, (#5, sp)
ld a, (#7, sp)
mul x, a
ld a, xl
add a, (#1, sp)
popw x
ld xh, a
ret
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