apps/codecs/libspeex/fixed_arm4.h

   1 /* Copyright (C) 2004 Jean-Marc Valin */
   2 /**
   3    @file fixed_arm4.h
   4    @brief ARM4 fixed-point operations
   5 */
   6 /*
   7    Redistribution and use in source and binary forms, with or without
   8    modification, are permitted provided that the following conditions
   9    are met:
  10
  11    - Redistributions of source code must retain the above copyright
  12    notice, this list of conditions and the following disclaimer.
  13
  14    - Redistributions in binary form must reproduce the above copyright
  15    notice, this list of conditions and the following disclaimer in the
  16    documentation and/or other materials provided with the distribution.
  17
  18    - Neither the name of the Xiph.org Foundation nor the names of its
  19    contributors may be used to endorse or promote products derived from
  20    this software without specific prior written permission.
  21
  22    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  25    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  26    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  27    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  28    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  29    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  30    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  31    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  32    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33 */
  34
  35 #ifndef FIXED_ARM4_H
  36 #define FIXED_ARM4_H
  37
  38 #undef MULT16_32_Q14
  39 static inline spx_word32_t MULT16_32_Q14(spx_word16_t x, spx_word32_t y) {
  40   int res;
  41   int dummy;
  42   asm (
  43         "smull  %0,%1,%2,%3 \n\t"
  44         "mov %0, %0, lsr #14 \n\t"
  45         "add %0, %0, %1, lsl #18 \n\t"
  46    : "=&r"(res), "=&r" (dummy)
  47    : "r"(y),"r"((int)x));
  48   return(res);
  49 }
  50
  51 #undef MULT16_32_Q15
  52 static inline spx_word32_t MULT16_32_Q15(spx_word16_t x, spx_word32_t y) {
  53   int res;
  54   int dummy;
  55   asm (
  56         "smull  %0,%1,%2,%3 \n\t"
  57         "mov %0, %0, lsr #15 \n\t"
  58         "add %0, %0, %1, lsl #17 \n\t"
  59    : "=&r"(res), "=&r" (dummy)
  60    : "r"(y),"r"((int)x));
  61   return(res);
  62 }
  63
  64 #undef DIV32_16
  65 static inline short DIV32_16(int a, int b)
  66 {
  67    int res=0;
  68    int dead1, dead2, dead3, dead4, dead5;
  69    __asm__ __volatile__ (
  70          "\teor %5, %0, %1\n"
  71          "\tmovs %4, %0\n"
  72          "\trsbmi %0, %0, #0 \n"
  73          "\tmovs %4, %1\n"
  74          "\trsbmi %1, %1, #0 \n"
  75          "\tmov %4, #1\n"
  76
  77          "\tsubs %3, %0, %1, asl #14 \n"
  78          "\tmovpl %0, %3 \n"
  79          "\torrpl %2, %2, %4, asl #14 \n"
  80
  81          "\tsubs %3, %0, %1, asl #13 \n"
  82          "\tmovpl %0, %3 \n"
  83          "\torrpl %2, %2, %4, asl #13 \n"
  84
  85          "\tsubs %3, %0, %1, asl #12 \n"
  86          "\tmovpl %0, %3 \n"
  87          "\torrpl %2, %2, %4, asl #12 \n"
  88
  89          "\tsubs %3, %0, %1, asl #11 \n"
  90          "\tmovpl %0, %3 \n"
  91          "\torrpl %2, %2, %4, asl #11 \n"
  92
  93          "\tsubs %3, %0, %1, asl #10 \n"
  94          "\tmovpl %0, %3 \n"
  95          "\torrpl %2, %2, %4, asl #10 \n"
  96
  97          "\tsubs %3, %0, %1, asl #9 \n"
  98          "\tmovpl %0, %3 \n"
  99          "\torrpl %2, %2, %4, asl #9 \n"
 100
 101          "\tsubs %3, %0, %1, asl #8 \n"
 102          "\tmovpl %0, %3 \n"
 103          "\torrpl %2, %2, %4, asl #8 \n"
 104
 105          "\tsubs %3, %0, %1, asl #7 \n"
 106          "\tmovpl %0, %3 \n"
 107          "\torrpl %2, %2, %4, asl #7 \n"
 108
 109          "\tsubs %3, %0, %1, asl #6 \n"
 110          "\tmovpl %0, %3 \n"
 111          "\torrpl %2, %2, %4, asl #6 \n"
 112
 113          "\tsubs %3, %0, %1, asl #5 \n"
 114          "\tmovpl %0, %3 \n"
 115          "\torrpl %2, %2, %4, asl #5 \n"
 116
 117          "\tsubs %3, %0, %1, asl #4 \n"
 118          "\tmovpl %0, %3 \n"
 119          "\torrpl %2, %2, %4, asl #4 \n"
 120
 121          "\tsubs %3, %0, %1, asl #3 \n"
 122          "\tmovpl %0, %3 \n"
 123          "\torrpl %2, %2, %4, asl #3 \n"
 124
 125          "\tsubs %3, %0, %1, asl #2 \n"
 126          "\tmovpl %0, %3 \n"
 127          "\torrpl %2, %2, %4, asl #2 \n"
 128
 129          "\tsubs %3, %0, %1, asl #1 \n"
 130          "\tmovpl %0, %3 \n"
 131          "\torrpl %2, %2, %4, asl #1 \n"
 132
 133          "\tsubs %3, %0, %1 \n"
 134          "\tmovpl %0, %3 \n"
 135          "\torrpl %2, %2, %4 \n"
 136
 137          "\tmovs %5, %5, lsr #31 \n"
 138          "\trsbne %2, %2, #0 \n"
 139    : "=r" (dead1), "=r" (dead2), "=r" (res),
 140    "=r" (dead3), "=r" (dead4), "=r" (dead5)
 141    : "0" (a), "1" (b), "2" (res)
 142    : "cc"
 143                         );
 144    return res;
 145 }
 146
 147
 148 #endif