;--------------------------------------------------------------------------
;  crtxpush0.asm - C run-time: push R0 and other registers to xstack
;
;  Copyright (C) 2009, Maarten Brock
;
;  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.
;--------------------------------------------------------------------------

;--------------------------------------------------------
; overlayable bit register bank
;--------------------------------------------------------
	.area BIT_BANK	(REL,OVR,DATA)
bits:
	.ds 1

	ar0 = 0x00
	ar1 = 0x01

	.area HOME    (CODE)

; Push registers r0..r7 & bits on xstack (r0 always)
; Expect allocation size in ACC and mask in B
___sdcc_xpush_regs_r0::
	add	a,_spx
	mov	_spx,a
	xch	a,r0		;push R0
	dec	r0
	movx	@r0,a
	ljmp	___sdcc_xpush