1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2010 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 L_sub function.
39 ------------------------------------------------------------------------------
42 /*----------------------------------------------------------------------------
43 ; CONTINUE ONLY IF NOT ALREADY DEFINED
44 ----------------------------------------------------------------------------*/
49 /*----------------------------------------------------------------------------
51 ----------------------------------------------------------------------------*/
52 #include "basicop_malloc.h"
55 /*--------------------------------------------------------------------------*/
61 /*----------------------------------------------------------------------------
63 ; Define module specific macros here
64 ----------------------------------------------------------------------------*/
66 /*----------------------------------------------------------------------------
68 ; Include all pre-processor statements here.
69 ----------------------------------------------------------------------------*/
71 /*----------------------------------------------------------------------------
72 ; EXTERNAL VARIABLES REFERENCES
73 ; Declare variables used in this module but defined elsewhere
74 ----------------------------------------------------------------------------*/
76 /*----------------------------------------------------------------------------
78 ----------------------------------------------------------------------------*/
80 /*----------------------------------------------------------------------------
81 ; ENUMERATED TYPEDEF'S
82 ----------------------------------------------------------------------------*/
84 /*----------------------------------------------------------------------------
85 ; STRUCTURES TYPEDEF'S
86 ----------------------------------------------------------------------------*/
88 /*----------------------------------------------------------------------------
89 ; GLOBAL FUNCTION DEFINITIONS
90 ; Function Prototype declaration
91 ----------------------------------------------------------------------------*/
92 #if ((PV_CPU_ARCH_VERSION >=5) && (PV_COMPILER == EPV_ARM_GNUC)) /* Instructions for ARM-linux cross-compiler*/
94 __inline Word32 L_sub(Word32 L_var1, Word32 L_var2, Flag *pOverflow)
96 register Word32 ra = L_var1;
97 register Word32 rb = L_var2;
100 OSCL_UNUSED_ARG(pOverflow);
102 asm volatile("qsub %0, %1, %2"
110 #else /* C EQUIVALENT */
112 static inline Word32 L_sub(register Word32 L_var1, register Word32 L_var2,
113 register Flag *pOverflow)
117 L_diff = L_var1 - L_var2;
119 if ((L_var1 ^ L_var2) < 0)
121 if ((L_diff ^ L_var1) & MIN_32)
123 L_diff = (L_var1 < 0L) ? MIN_32 : MAX_32;
132 /*----------------------------------------------------------------------------
134 ----------------------------------------------------------------------------*/
139 #endif /* _L_SUB_H_ */