1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
18 /****************************************************************************************
19 Portions of this file are derived from the following 3GPP standard:
22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
23 Available from http://www.3gpp.org
25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
26 Permission to distribute, modify and use this file under the standard license
27 terms listed above has been obtained from the copyright holder.
28 ****************************************************************************************/
33 ------------------------------------------------------------------------------
36 This file contains all the constant definitions and prototype definitions
37 needed by the Mpy_32_16 function.
39 ------------------------------------------------------------------------------
42 /*----------------------------------------------------------------------------
43 ; CONTINUE ONLY IF NOT ALREADY DEFINED
44 ----------------------------------------------------------------------------*/
48 /*----------------------------------------------------------------------------
50 ----------------------------------------------------------------------------*/
51 #include "basicop_malloc.h"
53 /*--------------------------------------------------------------------------*/
59 /*----------------------------------------------------------------------------
61 ; Define module specific macros here
62 ----------------------------------------------------------------------------*/
65 /*----------------------------------------------------------------------------
67 ; Include all pre-processor statements here.
68 ----------------------------------------------------------------------------*/
70 /*----------------------------------------------------------------------------
71 ; EXTERNAL VARIABLES REFERENCES
72 ; Declare variables used in this module but defined elsewhere
73 ----------------------------------------------------------------------------*/
75 /*----------------------------------------------------------------------------
77 ----------------------------------------------------------------------------*/
79 /*----------------------------------------------------------------------------
80 ; ENUMERATED TYPEDEF'S
81 ----------------------------------------------------------------------------*/
83 /*----------------------------------------------------------------------------
84 ; STRUCTURES TYPEDEF'S
85 ----------------------------------------------------------------------------*/
87 /*----------------------------------------------------------------------------
88 ; GLOBAL FUNCTION DEFINITIONS
89 ; Function Prototype declaration
90 ----------------------------------------------------------------------------*/
91 #if defined(PV_ARM_V5) /* Instructions for ARM Assembly on ADS*/
93 __inline Word32 Mpy_32_16(Word16 L_var1_hi,
103 OSCL_UNUSED_ARG(pOverflow);
105 __asm {SMULBB L_product, L_var1_hi, var2}
106 __asm {QDADD L_product, 0, L_product}
107 __asm {SMULBB result, L_var1_lo, var2}
109 __asm {QDADD L_sum, L_product, result}
113 #elif defined(PV_ARM_GCC_V5) /* Instructions for ARM-linux cross-compiler*/
115 static inline Word32 Mpy_32_16(Word16 L_var1_hi,
121 register Word32 ra = L_var1_hi;
122 register Word32 rb = L_var1_lo;
123 register Word32 rc = var2;
124 Word32 result, L_product;
126 OSCL_UNUSED_ARG(pOverflow);
128 asm volatile("smulbb %0, %1, %2"
132 asm volatile("mov %0, #0"
136 asm volatile("qdadd %0, %1, %2"
138 : "r"(result), "r"(L_product)
141 asm volatile("smulbb %0, %1, %2"
146 asm volatile("mov %0, %1, ASR #15"
150 asm volatile("qdadd %0, %1, %2"
152 : "r"(L_product), "r"(ra)
158 #else /* C_EQUIVALENT */
159 static inline Word32 Mpy_32_16(Word16 L_var1_hi,
168 L_product = (Word32) L_var1_hi * var2;
170 if (L_product != (Word32) 0x40000000L)
180 result = ((Word32)L_var1_lo * var2) >> 15;
182 L_sum = L_product + (result << 1);
184 if ((L_product ^ result) > 0)
186 if ((L_sum ^ L_product) < 0)
188 L_sum = (L_product < 0) ? MIN_32 : MAX_32;
197 /*----------------------------------------------------------------------------
199 ----------------------------------------------------------------------------*/
204 #endif /* _MPY_32_16_H_ */