1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
15 *
16 * Copyright (C) IBM Corporation, 2012
17 *
18 * Author: Anton Blanchard <anton@au.ibm.com>
19 */
20#include <altivec.h>
21
22#include <linux/preempt.h>
23#include <linux/export.h>
24#include <linux/sched.h>
25#include <asm/switch_to.h>
26
27typedef vector signed char unative_t;
28
29#define DEFINE(V)				\
30	unative_t *V = (unative_t *)V##_in;	\
31	unative_t V##_0, V##_1, V##_2, V##_3
32
33#define LOAD(V)			\
34	do {			\
35		V##_0 = V[0];	\
36		V##_1 = V[1];	\
37		V##_2 = V[2];	\
38		V##_3 = V[3];	\
39	} while (0)
40
41#define STORE(V)		\
42	do {			\
43		V[0] = V##_0;	\
44		V[1] = V##_1;	\
45		V[2] = V##_2;	\
46		V[3] = V##_3;	\
47	} while (0)
48
49#define XOR(V1, V2)					\
50	do {						\
51		V1##_0 = vec_xor(V1##_0, V2##_0);	\
52		V1##_1 = vec_xor(V1##_1, V2##_1);	\
53		V1##_2 = vec_xor(V1##_2, V2##_2);	\
54		V1##_3 = vec_xor(V1##_3, V2##_3);	\
55	} while (0)
56
57void xor_altivec_2(unsigned long bytes, unsigned long *v1_in,
58		   unsigned long *v2_in)
59{
60	DEFINE(v1);
61	DEFINE(v2);
62	unsigned long lines = bytes / (sizeof(unative_t)) / 4;
63
64	preempt_disable();
65	enable_kernel_altivec();
66
67	do {
68		LOAD(v1);
69		LOAD(v2);
70		XOR(v1, v2);
71		STORE(v1);
72
73		v1 += 4;
74		v2 += 4;
75	} while (--lines > 0);
76
77	preempt_enable();
78}
79EXPORT_SYMBOL(xor_altivec_2);
80
81void xor_altivec_3(unsigned long bytes, unsigned long *v1_in,
82		   unsigned long *v2_in, unsigned long *v3_in)
83{
84	DEFINE(v1);
85	DEFINE(v2);
86	DEFINE(v3);
87	unsigned long lines = bytes / (sizeof(unative_t)) / 4;
88
89	preempt_disable();
90	enable_kernel_altivec();
91
92	do {
93		LOAD(v1);
94		LOAD(v2);
95		LOAD(v3);
96		XOR(v1, v2);
97		XOR(v1, v3);
98		STORE(v1);
99
100		v1 += 4;
101		v2 += 4;
102		v3 += 4;
103	} while (--lines > 0);
104
105	preempt_enable();
106}
107EXPORT_SYMBOL(xor_altivec_3);
108
109void xor_altivec_4(unsigned long bytes, unsigned long *v1_in,
110		   unsigned long *v2_in, unsigned long *v3_in,
111		   unsigned long *v4_in)
112{
113	DEFINE(v1);
114	DEFINE(v2);
115	DEFINE(v3);
116	DEFINE(v4);
117	unsigned long lines = bytes / (sizeof(unative_t)) / 4;
118
119	preempt_disable();
120	enable_kernel_altivec();
121
122	do {
123		LOAD(v1);
124		LOAD(v2);
125		LOAD(v3);
126		LOAD(v4);
127		XOR(v1, v2);
128		XOR(v3, v4);
129		XOR(v1, v3);
130		STORE(v1);
131
132		v1 += 4;
133		v2 += 4;
134		v3 += 4;
135		v4 += 4;
136	} while (--lines > 0);
137
138	preempt_enable();
139}
140EXPORT_SYMBOL(xor_altivec_4);
141
142void xor_altivec_5(unsigned long bytes, unsigned long *v1_in,
143		   unsigned long *v2_in, unsigned long *v3_in,
144		   unsigned long *v4_in, unsigned long *v5_in)
145{
146	DEFINE(v1);
147	DEFINE(v2);
148	DEFINE(v3);
149	DEFINE(v4);
150	DEFINE(v5);
151	unsigned long lines = bytes / (sizeof(unative_t)) / 4;
152
153	preempt_disable();
154	enable_kernel_altivec();
155
156	do {
157		LOAD(v1);
158		LOAD(v2);
159		LOAD(v3);
160		LOAD(v4);
161		LOAD(v5);
162		XOR(v1, v2);
163		XOR(v3, v4);
164		XOR(v1, v5);
165		XOR(v1, v3);
166		STORE(v1);
167
168		v1 += 4;
169		v2 += 4;
170		v3 += 4;
171		v4 += 4;
172		v5 += 4;
173	} while (--lines > 0);
174
175	preempt_enable();
176}
177EXPORT_SYMBOL(xor_altivec_5);
178