arch/powerpc/lib/xor_vmx.c

   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
  27 typedef 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
  57 void 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         disable_kernel_altivec();
  78         preempt_enable();
  79 }
  80 EXPORT_SYMBOL(xor_altivec_2);
  81
  82 void xor_altivec_3(unsigned long bytes, unsigned long *v1_in,
  83                    unsigned long *v2_in, unsigned long *v3_in)
  84 {
  85         DEFINE(v1);
  86         DEFINE(v2);
  87         DEFINE(v3);
  88         unsigned long lines = bytes / (sizeof(unative_t)) / 4;
  89
  90         preempt_disable();
  91         enable_kernel_altivec();
  92
  93         do {
  94                 LOAD(v1);
  95                 LOAD(v2);
  96                 LOAD(v3);
  97                 XOR(v1, v2);
  98                 XOR(v1, v3);
  99                 STORE(v1);
 100
 101                 v1 += 4;
 102                 v2 += 4;
 103                 v3 += 4;
 104         } while (--lines > 0);
 105
 106         disable_kernel_altivec();
 107         preempt_enable();
 108 }
 109 EXPORT_SYMBOL(xor_altivec_3);
 110
 111 void xor_altivec_4(unsigned long bytes, unsigned long *v1_in,
 112                    unsigned long *v2_in, unsigned long *v3_in,
 113                    unsigned long *v4_in)
 114 {
 115         DEFINE(v1);
 116         DEFINE(v2);
 117         DEFINE(v3);
 118         DEFINE(v4);
 119         unsigned long lines = bytes / (sizeof(unative_t)) / 4;
 120
 121         preempt_disable();
 122         enable_kernel_altivec();
 123
 124         do {
 125                 LOAD(v1);
 126                 LOAD(v2);
 127                 LOAD(v3);
 128                 LOAD(v4);
 129                 XOR(v1, v2);
 130                 XOR(v3, v4);
 131                 XOR(v1, v3);
 132                 STORE(v1);
 133
 134                 v1 += 4;
 135                 v2 += 4;
 136                 v3 += 4;
 137                 v4 += 4;
 138         } while (--lines > 0);
 139
 140         disable_kernel_altivec();
 141         preempt_enable();
 142 }
 143 EXPORT_SYMBOL(xor_altivec_4);
 144
 145 void xor_altivec_5(unsigned long bytes, unsigned long *v1_in,
 146                    unsigned long *v2_in, unsigned long *v3_in,
 147                    unsigned long *v4_in, unsigned long *v5_in)
 148 {
 149         DEFINE(v1);
 150         DEFINE(v2);
 151         DEFINE(v3);
 152         DEFINE(v4);
 153         DEFINE(v5);
 154         unsigned long lines = bytes / (sizeof(unative_t)) / 4;
 155
 156         preempt_disable();
 157         enable_kernel_altivec();
 158
 159         do {
 160                 LOAD(v1);
 161                 LOAD(v2);
 162                 LOAD(v3);
 163                 LOAD(v4);
 164                 LOAD(v5);
 165                 XOR(v1, v2);
 166                 XOR(v3, v4);
 167                 XOR(v1, v5);
 168                 XOR(v1, v3);
 169                 STORE(v1);
 170
 171                 v1 += 4;
 172                 v2 += 4;
 173                 v3 += 4;
 174                 v4 += 4;
 175                 v5 += 4;
 176         } while (--lines > 0);
 177
 178         disable_kernel_altivec();
 179         preempt_enable();
 180 }
 181 EXPORT_SYMBOL(xor_altivec_5);