kernel/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         preempt_enable();
  78 }
  79 EXPORT_SYMBOL(xor_altivec_2);
  80
  81 void 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 }
 107 EXPORT_SYMBOL(xor_altivec_3);
 108
 109 void 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 }
 140 EXPORT_SYMBOL(xor_altivec_4);
 141
 142 void 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 }
 177 EXPORT_SYMBOL(xor_altivec_5);