apps/codecs/libtremor/asm_mcf5249.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  *
   9  * Copyright (C) 2005 by Pedro Vasconcelos
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  17  * KIND, either express or implied.
  18  *
  19  ****************************************************************************/
  20 /* asm routines for wide math on the MCF5249 */
  21
  22 #include "os_types.h"
  23
  24 #if defined(CPU_COLDFIRE)
  25
  26 /* attribute for 16-byte alignment */
  27 #define LINE_ATTR   __attribute__ ((aligned (16)))
  28
  29 #ifndef _V_WIDE_MATH
  30 #define _V_WIDE_MATH
  31
  32 #define MB()
  33
  34 static inline ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) {
  35
  36   asm volatile ("mac.l %[x], %[y], %%acc0;"    /* multiply & shift  */
  37                 "movclr.l %%acc0, %[x];"       /* move & clear acc */
  38                 "asr.l #1, %[x];"              /* no overflow test */
  39                 : [x] "+&d" (x)
  40                 : [y] "r" (y)
  41                 : "cc");
  42   return x;
  43 }
  44
  45 static inline ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) {
  46
  47   asm volatile ("mac.l %[x], %[y], %%acc0;" /* multiply */
  48                 "movclr.l %%acc0, %[x];"    /* move and clear */
  49                 : [x] "+&r" (x)
  50                 : [y] "r" (y)
  51                 : "cc");
  52   return x;
  53 }
  54
  55
  56 static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) {
  57   ogg_int32_t r;
  58
  59   asm volatile ("mac.l %[x], %[y], %%acc0;"  /* multiply */
  60                 "mulu.l %[y], %[x];"         /* get lower half, avoid emac stall */
  61                 "movclr.l %%acc0, %[r];"     /* get higher half */
  62                 "asl.l #8, %[r];"            /* hi<<16, plus one free */
  63                 "asl.l #8, %[r];"
  64                 "lsr.l #8, %[x];"            /* (unsigned)lo >> 15 */
  65                 "lsr.l #7, %[x];"
  66                 "or.l %[x], %[r];"           /* logical-or results */
  67                 : [r] "=&d" (r), [x] "+d" (x)
  68                 : [y] "d" (y)
  69                 : "cc");
  70   return r;
  71 }
  72
  73 #ifndef _V_VECT_OPS
  74 #define _V_VECT_OPS
  75
  76 /* asm versions of vector operations for block.c, window.c */
  77 /* assumes MAC is initialized & accumulators cleared */
  78 static inline
  79 void vect_add_right_left(ogg_int32_t *x, const ogg_int32_t *y, int n)
  80 {
  81   /* align to 16 bytes */
  82   while(n>0 && (int)x&15) {
  83     *x++ += *y++;
  84     n--;
  85   }
  86   asm volatile ("bra 1f;"
  87                 "0:"                          /* loop start */
  88                 "movem.l (%[x]), %%d0-%%d3;"  /* fetch values */
  89                 "movem.l (%[y]), %%a0-%%a3;"
  90                 /* add */
  91                 "add.l %%a0, %%d0;"
  92                 "add.l %%a1, %%d1;"
  93                 "add.l %%a2, %%d2;"
  94                 "add.l %%a3, %%d3;"
  95                 /* store and advance */
  96                 "movem.l %%d0-%%d3, (%[x]);"
  97                 "lea.l (4*4, %[x]), %[x];"
  98                 "lea.l (4*4, %[y]), %[y];"
  99                 "subq.l #4, %[n];"     /* done 4 elements */
 100                 "1: cmpi.l #4, %[n];"
 101                 "bge 0b;"
 102                 : [n] "+d" (n), [x] "+a" (x), [y] "+a" (y)
 103                 : : "%d0", "%d1", "%d2", "%d3", "%a0", "%a1", "%a2", "%a3",
 104                     "cc", "memory");
 105   /* add final elements */
 106   while (n>0) {
 107     *x++ += *y++;
 108     n--;
 109   }
 110 }
 111 static inline
 112 void vect_add_left_right(ogg_int32_t *x, const ogg_int32_t *y, int n)
 113 {
 114     /* coldfire asm has symmetrical versions of vect_add_right_left
 115        and vect_add_left_right  (since symmetrical versions of
 116        vect_mult_fw and vect_mult_bw  i.e.  both use MULT31) */
 117     vect_add_right_left(x, y, n );
 118 }
 119
 120 static inline
 121 void vect_copy(ogg_int32_t *x, const ogg_int32_t *y, int n)
 122 {
 123   /* align to 16 bytes */
 124   while(n>0 && (int)x&15) {
 125     *x++ = *y++;
 126     n--;
 127   }
 128   asm volatile ("bra 1f;"
 129                 "0:"                                    /* loop start */
 130                 "movem.l (%[y]), %%d0-%%d3;"            /* fetch values */
 131                 "movem.l %%d0-%%d3, (%[x]);"            /* store */
 132                 "lea.l (4*4, %[x]), %[x];"              /* advance */
 133                 "lea.l (4*4, %[y]), %[y];"
 134                 "subq.l #4, %[n];"                      /* done 4 elements */
 135                 "1: cmpi.l #4, %[n];"
 136                 "bge 0b;"
 137                 : [n] "+d" (n), [x] "+a" (x), [y] "+a" (y)
 138                 : : "%d0", "%d1", "%d2", "%d3", "cc", "memory");
 139   /* copy final elements */
 140   while (n>0) {
 141     *x++ = *y++;
 142     n--;
 143   }
 144 }
 145
 146 static inline
 147 void vect_mult_fw(ogg_int32_t *data, LOOKUP_T *window, int n)
 148 {
 149   /* ensure data is aligned to 16-bytes */
 150   while(n>0 && (int)data&15) {
 151     *data = MULT31(*data, *window);
 152     data++;
 153     window++;
 154     n--;
 155   }
 156   asm volatile ("movem.l (%[d]), %%d0-%%d3;"  /* loop start */
 157                 "movem.l (%[w]), %%a0-%%a3;"  /* pre-fetch registers */
 158                 "lea.l (4*4, %[w]), %[w];"
 159                 "bra 1f;"               /* jump to loop condition */
 160                 "0:" /* loop body */
 161                 /* multiply and load next window values */
 162                 "mac.l %%d0, %%a0, (%[w])+, %%a0, %%acc0;"
 163                 "mac.l %%d1, %%a1, (%[w])+, %%a1, %%acc1;"
 164                 "mac.l %%d2, %%a2, (%[w])+, %%a2, %%acc2;"
 165                 "mac.l %%d3, %%a3, (%[w])+, %%a3, %%acc3;"
 166                 "movclr.l %%acc0, %%d0;"  /* get the products */
 167                 "movclr.l %%acc1, %%d1;"
 168                 "movclr.l %%acc2, %%d2;"
 169                 "movclr.l %%acc3, %%d3;"
 170                 /* store and advance */
 171                 "movem.l %%d0-%%d3, (%[d]);"
 172                 "lea.l (4*4, %[d]), %[d];"
 173                 "movem.l (%[d]), %%d0-%%d3;"
 174                 "subq.l #4, %[n];"     /* done 4 elements */
 175                 "1: cmpi.l #4, %[n];"
 176                 "bge 0b;"
 177                 /* multiply final elements */
 178                 "tst.l %[n];"
 179                 "beq 1f;"      /* n=0 */
 180                 "mac.l %%d0, %%a0, %%acc0;"
 181                 "movclr.l %%acc0, %%d0;"
 182                 "move.l %%d0, (%[d])+;"
 183                 "subq.l #1, %[n];"
 184                 "beq 1f;"     /* n=1 */
 185                 "mac.l %%d1, %%a1, %%acc0;"
 186                 "movclr.l %%acc0, %%d1;"
 187                 "move.l %%d1, (%[d])+;"
 188                 "subq.l #1, %[n];"
 189                 "beq 1f;"     /* n=2 */
 190                 /* otherwise n = 3 */
 191                 "mac.l %%d2, %%a2, %%acc0;"
 192                 "movclr.l %%acc0, %%d2;"
 193                 "move.l %%d2, (%[d])+;"
 194                 "1:"
 195                 : [n] "+d" (n), [d] "+a" (data), [w] "+a" (window)
 196                 : : "%d0", "%d1", "%d2", "%d3", "%a0", "%a1", "%a2", "%a3",
 197                     "cc", "memory");
 198 }
 199
 200 static inline
 201 void vect_mult_bw(ogg_int32_t *data, LOOKUP_T *window, int n)
 202 {
 203   /* ensure at least data is aligned to 16-bytes */
 204   while(n>0 && (int)data&15) {
 205     *data = MULT31(*data, *window);
 206     data++;
 207     window--;
 208     n--;
 209   }
 210   asm volatile ("lea.l (-3*4, %[w]), %[w];"     /* loop start */
 211                 "movem.l (%[d]), %%d0-%%d3;"    /* pre-fetch registers */
 212                 "movem.l (%[w]), %%a0-%%a3;"
 213                 "bra 1f;"               /* jump to loop condition */
 214                 "0:" /* loop body */
 215                 /* multiply and load next window value */
 216                 "mac.l %%d0, %%a3, -(%[w]), %%a3, %%acc0;"
 217                 "mac.l %%d1, %%a2, -(%[w]), %%a2, %%acc1;"
 218                 "mac.l %%d2, %%a1, -(%[w]), %%a1, %%acc2;"
 219                 "mac.l %%d3, %%a0, -(%[w]), %%a0, %%acc3;"
 220                 "movclr.l %%acc0, %%d0;"  /* get the products */
 221                 "movclr.l %%acc1, %%d1;"
 222                 "movclr.l %%acc2, %%d2;"
 223                 "movclr.l %%acc3, %%d3;"
 224                 /* store and advance */
 225                 "movem.l %%d0-%%d3, (%[d]);"
 226                 "lea.l (4*4, %[d]), %[d];"
 227                 "movem.l (%[d]), %%d0-%%d3;"
 228                 "subq.l #4, %[n];"     /* done 4 elements */
 229                 "1: cmpi.l #4, %[n];"
 230                 "bge 0b;"
 231                 /* multiply final elements */
 232                 "tst.l %[n];"
 233                 "beq 1f;"      /* n=0 */
 234                 "mac.l %%d0, %%a3, %%acc0;"
 235                 "movclr.l %%acc0, %%d0;"
 236                 "move.l %%d0, (%[d])+;"
 237                 "subq.l #1, %[n];"
 238                 "beq 1f;"     /* n=1 */
 239                 "mac.l %%d1, %%a2, %%acc0;"
 240                 "movclr.l %%acc0, %%d1;"
 241                 "move.l %%d1, (%[d])+;"
 242                 "subq.l #1, %[n];"
 243                 "beq 1f;"     /* n=2 */
 244                 /* otherwise n = 3 */
 245                 "mac.l %%d2, %%a1, %%acc0;"
 246                 "movclr.l %%acc0, %%d2;"
 247                 "move.l %%d2, (%[d])+;"
 248                 "1:"
 249                 : [n] "+d" (n), [d] "+a" (data), [w] "+a" (window)
 250                 : : "%d0", "%d1", "%d2", "%d3", "%a0", "%a1", "%a2", "%a3",
 251                     "cc", "memory");
 252 }
 253
 254 #endif
 255
 256 #endif
 257
 258 #ifndef _V_CLIP_MATH
 259 #define _V_CLIP_MATH
 260
 261 /* this is portable C and simple; why not use this as default? */
 262 static inline ogg_int32_t CLIP_TO_15(register ogg_int32_t x) {
 263   register ogg_int32_t hi=32767, lo=-32768;
 264   return (x>=hi ? hi : (x<=lo ? lo : x));
 265 }
 266
 267 #endif
 268 #else
 269 #define LINE_ATTR
 270 #endif