| /* ------------------------------------------------------------------ |
| * Copyright (C) 1998-2009 PacketVideo |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
| * express or implied. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * ------------------------------------------------------------------- |
| */ |
| /**************************************************************************************** |
| Portions of this file are derived from the following 3GPP standard: |
| |
| 3GPP TS 26.073 |
| ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec |
| Available from http://www.3gpp.org |
| |
| (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) |
| Permission to distribute, modify and use this file under the standard license |
| terms listed above has been obtained from the copyright holder. |
| ****************************************************************************************/ |
| /* |
| Pathname: ./gsm-amr/c/include/norm_l.h |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Description: Created separate header file for norm_l function. |
| |
| Description: Updated template to make it build in Symbian. Updated copyright |
| year. |
| |
| Description: Moved _cplusplus #ifdef after Include section. |
| |
| Description: Support for ARM and Linux-ARM assembly. |
| |
| Who: Date: |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| |
| This file contains all the constant definitions and prototype definitions |
| needed by the norm_l function. |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| /*---------------------------------------------------------------------------- |
| ; CONTINUE ONLY IF NOT ALREADY DEFINED |
| ----------------------------------------------------------------------------*/ |
| #ifndef NORM_L_H |
| #define NORM_L_H |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| #include "basicop_malloc.h" |
| |
| /*--------------------------------------------------------------------------*/ |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES |
| ; Include all pre-processor statements here. |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL VARIABLES REFERENCES |
| ; Declare variables used in this module but defined elsewhere |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; SIMPLE TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; ENUMERATED TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; STRUCTURES TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; GLOBAL FUNCTION DEFINITIONS |
| ; Function Prototype declaration |
| ----------------------------------------------------------------------------*/ |
| #if !( defined(PV_ARM_V5) || defined(PV_ARM_GCC_V5) ) |
| |
| /* C EQUIVALENT */ |
| Word16 norm_l(Word32 L_var1); |
| |
| #elif defined(PV_ARM_V5) |
| |
| __inline Word16 norm_l(Word32 L_var1) |
| { |
| register Word32 var_out = 0; |
| |
| __asm |
| { |
| CMP L_var1, #0 |
| EORNE L_var1, L_var1, L_var1, LSL #1 |
| CLZNE var_out, L_var1 |
| } |
| |
| return ((Word16)var_out); |
| } |
| |
| #elif defined(PV_ARM_GCC_V5) |
| |
| static inline Word16 norm_l(Word32 L_var1) |
| { |
| register Word32 var_out = 0; |
| register Word32 ra = L_var1; |
| if (L_var1) |
| { |
| ra ^= (ra << 1); |
| asm volatile( |
| "clz %0, %1" |
| : "=r"(var_out) |
| : "r"(ra) |
| ); |
| } |
| return (var_out); |
| } |
| |
| #endif |
| /*---------------------------------------------------------------------------- |
| ; END |
| ----------------------------------------------------------------------------*/ |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |
| |
| |
