1 /* Copyright (C) 2005 Analog Devices 2 Author: Jean-Marc Valin */ 3 /** 4 @file fixed_bfin.h 5 @brief Blackfin fixed-point operations 6 */ 7 /* 8 Redistribution and use in source and binary forms, with or without 9 modification, are permitted provided that the following conditions 10 are met: 11 12 - Redistributions of source code must retain the above copyright 13 notice, this list of conditions and the following disclaimer. 14 15 - Redistributions in binary form must reproduce the above copyright 16 notice, this list of conditions and the following disclaimer in the 17 documentation and/or other materials provided with the distribution. 18 19 - Neither the name of the Xiph.org Foundation nor the names of its 20 contributors may be used to endorse or promote products derived from 21 this software without specific prior written permission. 22 23 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 27 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 28 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 29 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #ifndef FIXED_BFIN_H 37 #define FIXED_BFIN_H 38 39 #undef PDIV32_16 40 static inline spx_word16_t PDIV32_16(spx_word32_t a, spx_word16_t b) 41 { 42 spx_word32_t res, bb; 43 bb = b; 44 a += b>>1; 45 __asm__ ( 46 "P0 = 15;\n\t" 47 "R0 = %1;\n\t" 48 "R1 = %2;\n\t" 49 //"R0 = R0 + R1;\n\t" 50 "R0 <<= 1;\n\t" 51 "DIVS (R0, R1);\n\t" 52 "LOOP divide%= LC0 = P0;\n\t" 53 "LOOP_BEGIN divide%=;\n\t" 54 "DIVQ (R0, R1);\n\t" 55 "LOOP_END divide%=;\n\t" 56 "R0 = R0.L;\n\t" 57 "%0 = R0;\n\t" 58 : "=m" (res) 59 : "m" (a), "m" (bb) 60 : "P0", "R0", "R1", "cc"); 61 return res; 62 } 63 64 #undef DIV32_16 65 static inline spx_word16_t DIV32_16(spx_word32_t a, spx_word16_t b) 66 { 67 spx_word32_t res, bb; 68 bb = b; 69 /* Make the roundinf consistent with the C version 70 (do we need to do that?)*/ 71 if (a<0) 72 a += (b-1); 73 __asm__ ( 74 "P0 = 15;\n\t" 75 "R0 = %1;\n\t" 76 "R1 = %2;\n\t" 77 "R0 <<= 1;\n\t" 78 "DIVS (R0, R1);\n\t" 79 "LOOP divide%= LC0 = P0;\n\t" 80 "LOOP_BEGIN divide%=;\n\t" 81 "DIVQ (R0, R1);\n\t" 82 "LOOP_END divide%=;\n\t" 83 "R0 = R0.L;\n\t" 84 "%0 = R0;\n\t" 85 : "=m" (res) 86 : "m" (a), "m" (bb) 87 : "P0", "R0", "R1", "cc"); 88 return res; 89 } 90 91 #undef MAX16 92 static inline spx_word16_t MAX16(spx_word16_t a, spx_word16_t b) 93 { 94 spx_word32_t res; 95 __asm__ ( 96 "%1 = %1.L (X);\n\t" 97 "%2 = %2.L (X);\n\t" 98 "%0 = MAX(%1,%2);" 99 : "=d" (res) 100 : "%d" (a), "d" (b) 101 ); 102 return res; 103 } 104 105 #undef MULT16_32_Q15 106 static inline spx_word32_t MULT16_32_Q15(spx_word16_t a, spx_word32_t b) 107 { 108 spx_word32_t res; 109 __asm__ 110 ( 111 "A1 = %2.L*%1.L (M);\n\t" 112 "A1 = A1 >>> 15;\n\t" 113 "%0 = (A1 += %2.L*%1.H) ;\n\t" 114 : "=&W" (res), "=&d" (b) 115 : "d" (a), "1" (b) 116 : "A1" 117 ); 118 return res; 119 } 120 121 #undef MAC16_32_Q15 122 static inline spx_word32_t MAC16_32_Q15(spx_word32_t c, spx_word16_t a, spx_word32_t b) 123 { 124 spx_word32_t res; 125 __asm__ 126 ( 127 "A1 = %2.L*%1.L (M);\n\t" 128 "A1 = A1 >>> 15;\n\t" 129 "%0 = (A1 += %2.L*%1.H);\n\t" 130 "%0 = %0 + %4;\n\t" 131 : "=&W" (res), "=&d" (b) 132 : "d" (a), "1" (b), "d" (c) 133 : "A1" 134 ); 135 return res; 136 } 137 138 #undef MULT16_32_Q14 139 static inline spx_word32_t MULT16_32_Q14(spx_word16_t a, spx_word32_t b) 140 { 141 spx_word32_t res; 142 __asm__ 143 ( 144 "%2 <<= 1;\n\t" 145 "A1 = %1.L*%2.L (M);\n\t" 146 "A1 = A1 >>> 15;\n\t" 147 "%0 = (A1 += %1.L*%2.H);\n\t" 148 : "=W" (res), "=d" (a), "=d" (b) 149 : "1" (a), "2" (b) 150 : "A1" 151 ); 152 return res; 153 } 154 155 #undef MAC16_32_Q14 156 static inline spx_word32_t MAC16_32_Q14(spx_word32_t c, spx_word16_t a, spx_word32_t b) 157 { 158 spx_word32_t res; 159 __asm__ 160 ( 161 "%1 <<= 1;\n\t" 162 "A1 = %2.L*%1.L (M);\n\t" 163 "A1 = A1 >>> 15;\n\t" 164 "%0 = (A1 += %2.L*%1.H);\n\t" 165 "%0 = %0 + %4;\n\t" 166 : "=&W" (res), "=&d" (b) 167 : "d" (a), "1" (b), "d" (c) 168 : "A1" 169 ); 170 return res; 171 } 172 173 #endif 174
