1;;  Copyright 2010  Free Software Foundation, Inc.
 2;;  Contributed by Bernd Schmidt <bernds@codesourcery.com>.
 3;;
 4;; This program is free software; you can redistribute it and/or modify
 5;; it under the terms of the GNU General Public License as published by
 6;; the Free Software Foundation; either version 2 of the License, or
 7;; (at your option) any later version.
 8;;
 9;; This program is distributed in the hope that it will be useful,
10;; but WITHOUT ANY WARRANTY; without even the implied warranty of
11;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12;; GNU General Public License for more details.
13;;
14;; You should have received a copy of the GNU General Public License
15;; along with this program; if not, write to the Free Software
16;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17
18#include <linux/linkage.h>
19
20	;; ABI considerations for the divide functions
21	;; The following registers are call-used:
22	;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5
23	;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4
24	;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4
25	;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4
26	;;
27	;; In our implementation, divu and remu are leaf functions,
28	;; while both divi and remi call into divu.
29	;; A0 is not clobbered by any of the functions.
30	;; divu does not clobber B2 either, which is taken advantage of
31	;; in remi.
32	;; divi uses B5 to hold the original return address during
33	;; the call to divu.
34	;; remi uses B2 and A5 to hold the input values during the
35	;; call to divu.  It stores B3 in on the stack.
36
37	.text
38ENTRY(__c6xabi_divi)
39	call	.s2	__c6xabi_divu
40||	mv	.d2	B3, B5
41||	cmpgt	.l1	0, A4, A1
42||	cmpgt	.l2	0, B4, B1
43
44   [A1]	neg	.l1	A4, A4
45|| [B1]	neg	.l2	B4, B4
46||	xor	.s1x	A1, B1, A1
47   [A1] addkpc	.s2	_divu_ret, B3, 4
48_divu_ret:
49	neg	.l1	A4, A4
50||	mv	.l2	B3,B5
51||	ret	.s2	B5
52	nop		5
53ENDPROC(__c6xabi_divi)

 1;; SPDX-License-Identifier: GPL-2.0-or-later
 2;;  Copyright 2010  Free Software Foundation, Inc.
 3;;  Contributed by Bernd Schmidt <bernds@codesourcery.com>.
 4;;
 
 
 
 
 
 
 
 
 
 
 
 
 
 5
 6#include <linux/linkage.h>
 7
 8	;; ABI considerations for the divide functions
 9	;; The following registers are call-used:
10	;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5
11	;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4
12	;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4
13	;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4
14	;;
15	;; In our implementation, divu and remu are leaf functions,
16	;; while both divi and remi call into divu.
17	;; A0 is not clobbered by any of the functions.
18	;; divu does not clobber B2 either, which is taken advantage of
19	;; in remi.
20	;; divi uses B5 to hold the original return address during
21	;; the call to divu.
22	;; remi uses B2 and A5 to hold the input values during the
23	;; call to divu.  It stores B3 in on the stack.
24
25	.text
26ENTRY(__c6xabi_divi)
27	call	.s2	__c6xabi_divu
28||	mv	.d2	B3, B5
29||	cmpgt	.l1	0, A4, A1
30||	cmpgt	.l2	0, B4, B1
31
32   [A1]	neg	.l1	A4, A4
33|| [B1]	neg	.l2	B4, B4
34||	xor	.s1x	A1, B1, A1
35   [A1] addkpc	.s2	_divu_ret, B3, 4
36_divu_ret:
37	neg	.l1	A4, A4
38||	mv	.l2	B3,B5
39||	ret	.s2	B5
40	nop		5
41ENDPROC(__c6xabi_divi)