| /* ------------------------------------------------------------------ |
| * 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. |
| * ------------------------------------------------------------------- |
| */ |
| /* |
| |
| Pathname: pv_normalize.h |
| |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Who: Date: |
| Description: |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| #ifndef PV_NORMALIZE_H |
| #define PV_NORMALIZE_H |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| |
| #include "pv_audio_type_defs.h" |
| |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL VARIABLES REFERENCES |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES AND SIMPLE TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| #if defined(_ARM) |
| |
| __inline Int pv_normalize(Int32 x) |
| { |
| Int32 y; |
| __asm |
| { |
| clz y, x; |
| sub y, y, #1 |
| } |
| return (y); |
| } |
| |
| |
| #elif (defined(PV_ARM_GCC_V5)||defined(PV_ARM_GCC_V4)) |
| |
| __inline Int pv_normalize(Int32 x) |
| { |
| register Int32 y; |
| register Int32 ra = x; |
| |
| |
| asm volatile( |
| "clz %0, %1\n\t" |
| "sub %0, %0, #1" |
| : "=&r*i"(y) |
| : "r"(ra)); |
| return (y); |
| |
| } |
| |
| #else |
| |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| |
| Int pv_normalize(Int32 x); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |
| |
| |
| |
| #endif /* PV_NORMALIZE_H */ |
