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 mult function.
39 ------------------------------------------------------------------------------
45 /*----------------------------------------------------------------------------
47 ----------------------------------------------------------------------------*/
49 #include "basicop_malloc.h"
51 /*--------------------------------------------------------------------------*/
57 /*----------------------------------------------------------------------------
59 ; Define module specific macros here
60 ----------------------------------------------------------------------------*/
62 /*----------------------------------------------------------------------------
64 ; Include all pre-processor statements here.
65 ----------------------------------------------------------------------------*/
67 /*----------------------------------------------------------------------------
68 ; EXTERNAL VARIABLES REFERENCES
69 ; Declare variables used in this module but defined elsewhere
70 ----------------------------------------------------------------------------*/
72 /*----------------------------------------------------------------------------
74 ----------------------------------------------------------------------------*/
76 /*----------------------------------------------------------------------------
77 ; ENUMERATED TYPEDEF'S
78 ----------------------------------------------------------------------------*/
80 /*----------------------------------------------------------------------------
81 ; STRUCTURES TYPEDEF'S
82 ----------------------------------------------------------------------------*/
84 /*----------------------------------------------------------------------------
85 ; GLOBAL FUNCTION DEFINITIONS
86 ; Function Prototype declaration
87 ----------------------------------------------------------------------------*/
88 #if defined(PV_ARM_V5)
90 __inline Word16 mult(Word16 var1, Word16 var2, Flag *pOverflow)
94 OSCL_UNUSED_ARG(pOverflow);
98 SMULBB product, var1, var2
99 MOV product, product, ASR #15
101 MOVGE product, 0x7FFF
104 return ((Word16) product);
107 #elif defined(PV_ARM_GCC_V5)
109 __inline Word16 mult(Word16 var1, Word16 var2, Flag *pOverflow)
111 register Word32 ra = var1;
112 register Word32 rb = var2;
114 Word32 temp = 0x7FFF;
116 OSCL_UNUSED_ARG(pOverflow);
118 asm volatile("smulbb %0, %1, %2"
122 asm volatile("mov %0, %1, ASR #15"
126 asm volatile("cmp %0, %1"
130 asm volatile("movge %0, %1"
135 return ((Word16) product);
138 #else /* C EQUIVALENT */
140 static inline Word16 mult(Word16 var1, Word16 var2, Flag *pOverflow)
142 register Word32 product;
144 product = ((Word32) var1 * var2) >> 15;
146 /* Saturate result (if necessary). */
147 /* var1 * var2 >0x00007fff is the only case */
148 /* that saturation occurs. */
150 if (product > 0x00007fffL)
153 product = (Word32) MAX_16;
157 /* Return the product as a 16 bit value by type casting Word32 to Word16 */
159 return ((Word16) product);
163 /*----------------------------------------------------------------------------
165 ----------------------------------------------------------------------------*/
170 #endif /* _MULT_H_ */