shift.asm
bitfixer_bitfixer/dg/z88dk/libsrc/z80_crt0s/crt0_sdcc/shift.asm
;--------------------------------------------------------------------------
;  putchar.s
;
;  Copyright (C) 2001, Michael Hope
;
;  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 2.1, 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.
;--------------------------------------------------------------------------
	PUBLIC __rrulong_rrx_s
	PUBLIC __rrslong_rrx_s
	PUBLIC __rlslong_rrx_s
	PUBLIC __rlulong_rrx_s

__rrulong_rrx_s:
        ld      hl,#2+4
        add     hl,sp

        ld      a,(hl)
        or      a,a
	pop     bc
	pop     hl
	pop     de
	push    de
	push    hl
	push    bc
        ret     Z
        ld      b,a
        ld      a,e
.lab1
        srl     d
        rra
        rr	h
        rr      l

        djnz    lab1
        ld      e,a
        ret

__rrslong_rrx_s:
        ld      hl,#2+4
        add     hl,sp

        ld      a,(hl)
        or      a,a
	pop     bc
	pop     hl
	pop     de
	push    de
	push    hl
	push    bc
        ret     Z
        ld      b,a
        ld      a,e
.lab2
        sra     d
        rra
        rr	h
        rr      l

        djnz    lab2
        ld      e,a
        ret

__rlslong_rrx_s:
__rlulong_rrx_s:
        ld      hl,#2+4
        add     hl,sp

        ld      a,(hl)
        or      a,a
	pop     bc
	pop     hl
	pop     de
	push    de
	push    hl
	push    bc
        ret     Z
        ld      b,a
        ld      a,e
lab3:
        add     hl,hl
        rla
        rl	d

        djnz    lab3
        ld      e,a
        ret
