1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 /* 19 ------------------------------------------------------------------------------ 20 PacketVideo Corp. 21 MP3 Decoder Library 22 23 Pathname: ./cpp/include/pv_mp3dec_fxd_op_arm.h 24 25 Date: 08/20/2007 26 27 ------------------------------------------------------------------------------ 28 REVISION HISTORY 29 30 Description: 31 ------------------------------------------------------------------------------ 32 INCLUDE DESCRIPTION 33 34 This file select the associated fixed point functions with the OS/ARCH. 35 36 37 ------------------------------------------------------------------------------ 38 */ 39 40 #ifndef PV_MP3DEC_FXD_OP_ARM 41 #define PV_MP3DEC_FXD_OP_ARM 42 43 44 #ifdef __cplusplus 45 extern "C" 46 { 47 #endif 48 49 #include "pvmp3_audio_type_defs.h" 50 51 52 #if (defined(PV_ARM_V5)||defined(PV_ARM_V4)) 53 54 55 __inline Int32 fxp_mul32_Q30(const Int32 L_var1, const Int32 L_var2) 56 { 57 58 Int32 result64_hi; 59 Int32 result64_lo; 60 __asm 61 { 62 smull result64_lo, result64_hi, L_var2, L_var1 63 mov result64_lo, result64_lo, lsr #30 64 add result64_hi, result64_lo, result64_hi, asl #2 65 } 66 return (result64_hi); 67 } 68 69 __inline Int32 fxp_mac32_Q30(const Int32 L_var1, const Int32 L_var2, Int32 L_add) 70 { 71 Int32 result64_hi; 72 Int32 result64_lo; 73 __asm 74 { 75 smull result64_lo, result64_hi, L_var2, L_var1 76 add L_add, L_add, result64_hi, asl #2 77 add L_add, L_add, result64_lo, lsr #30 78 } 79 return (L_add); 80 } 81 82 83 84 #define Qfmt_31(a) (Int32)(a*0x7FFFFFFF + (a>=0?0.5F:-0.5F)) 85 86 87 88 __inline Int32 fxp_mul32_Q32(Int32 L_var1, const Int32 L_var2) 89 { 90 Int32 result64_hi; 91 __asm 92 { 93 smull L_var1, result64_hi, L_var2, L_var1 94 } 95 return (result64_hi); 96 } 97 98 __inline Int32 fxp_mul32_Q28(const Int32 L_var1, const Int32 L_var2) 99 { 100 101 Int32 result64_hi; 102 Int32 result64_lo; 103 __asm 104 { 105 smull result64_lo, result64_hi, L_var2, L_var1 106 mov result64_lo, result64_lo, lsr #28 107 add result64_hi, result64_lo, result64_hi, asl #4 108 } 109 return (result64_hi); 110 } 111 112 113 __inline Int32 fxp_mul32_Q27(const Int32 L_var1, const Int32 L_var2) 114 { 115 116 Int32 result64_hi; 117 Int32 result64_lo; 118 __asm 119 { 120 smull result64_lo, result64_hi, L_var2, L_var1 121 mov result64_lo, result64_lo, lsr #27 122 add result64_hi, result64_lo, result64_hi, asl #5 123 } 124 return (result64_hi); 125 } 126 127 128 __inline Int32 fxp_mul32_Q26(Int32 L_var1, Int32 L_var2) 129 { 130 131 Int32 result64_hi; 132 Int32 result64_lo; 133 __asm 134 { 135 smull result64_lo, result64_hi, L_var2, L_var1 136 mov result64_lo, result64_lo, lsr #26 137 add result64_hi, result64_lo, result64_hi, asl #6 138 } 139 return (result64_hi); 140 } 141 142 143 144 __inline Int32 fxp_mac32_Q32(Int32 L_add, Int32 L_var1, const Int32 L_var2) 145 { 146 __asm 147 { 148 smlal L_var1, L_add, L_var2, L_var1 149 } 150 return L_add; 151 } 152 153 154 __inline Int32 fxp_msb32_Q32(Int32 L_sub, Int32 L_var1, Int32 L_var2) 155 { 156 157 __asm 158 { 159 smull L_var2, L_var1, L_var2, L_var1 160 sub L_sub, L_sub, L_var1 161 } 162 return L_sub; 163 } 164 165 166 __inline Int32 fxp_mul32_Q29(const Int32 L_var1, const Int32 L_var2) 167 { 168 Int32 result64_hi; 169 Int32 result64_lo; 170 __asm 171 { 172 smull result64_lo, result64_hi, L_var2, L_var1 173 mov result64_lo, result64_lo, lsr #29 174 add result64_hi, result64_lo, result64_hi, asl #3 175 } 176 return (result64_hi); 177 } 178 179 180 __inline int32 pv_abs(int32 a) 181 { 182 Int32 b; 183 /* 184 b = a - (a<0); 185 a = b ^ sign(b) 186 */ 187 __asm 188 { 189 sub b, a, a, lsr #31 190 eor a, b, b, asr #31 191 } 192 return (a); 193 } 194 195 #endif 196 197 #ifdef __cplusplus 198 } 199 #endif 200 201 202 #endif /* PV_MP3DEC_FXD_OP_ARM */ 203 204
