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/* ------------------------------------------------------------------
* 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.
* -------------------------------------------------------------------
*/
/*
------------------------------------------------------------------------------
PacketVideo Corp.
MP3 Decoder Library
Pathname: ./cpp/include/pv_mp3dec_fxd_op_arm.h
Date: 08/20/2007
------------------------------------------------------------------------------
REVISION HISTORY
Description:
------------------------------------------------------------------------------
INCLUDE DESCRIPTION
This file select the associated fixed point functions with the OS/ARCH.
------------------------------------------------------------------------------
*/
#ifndef PV_MP3DEC_FXD_OP_ARM
#define PV_MP3DEC_FXD_OP_ARM
#ifdef __cplusplus
extern "C"
{
#endif
#include "pvmp3_audio_type_defs.h"
#if (defined(PV_ARM_V5)||defined(PV_ARM_V4))
__inline Int32 fxp_mul32_Q30(const Int32 L_var1, const Int32 L_var2)
{
Int32 result64_hi;
Int32 result64_lo;
__asm
{
smull result64_lo, result64_hi, L_var2, L_var1
mov result64_lo, result64_lo, lsr #30
add result64_hi, result64_lo, result64_hi, asl #2
}
return (result64_hi);
}
__inline Int32 fxp_mac32_Q30(const Int32 L_var1, const Int32 L_var2, Int32 L_add)
{
Int32 result64_hi;
Int32 result64_lo;
__asm
{
smull result64_lo, result64_hi, L_var2, L_var1
add L_add, L_add, result64_hi, asl #2
add L_add, L_add, result64_lo, lsr #30
}
return (L_add);
}
#define Qfmt_31(a) (Int32)(a*0x7FFFFFFF + (a>=0?0.5F:-0.5F))
__inline Int32 fxp_mul32_Q32(Int32 L_var1, const Int32 L_var2)
{
Int32 result64_hi;
__asm
{
smull L_var1, result64_hi, L_var2, L_var1
}
return (result64_hi);
}
__inline Int32 fxp_mul32_Q28(const Int32 L_var1, const Int32 L_var2)
{
Int32 result64_hi;
Int32 result64_lo;
__asm
{
smull result64_lo, result64_hi, L_var2, L_var1
mov result64_lo, result64_lo, lsr #28
add result64_hi, result64_lo, result64_hi, asl #4
}
return (result64_hi);
}
__inline Int32 fxp_mul32_Q27(const Int32 L_var1, const Int32 L_var2)
{
Int32 result64_hi;
Int32 result64_lo;
__asm
{
smull result64_lo, result64_hi, L_var2, L_var1
mov result64_lo, result64_lo, lsr #27
add result64_hi, result64_lo, result64_hi, asl #5
}
return (result64_hi);
}
__inline Int32 fxp_mul32_Q26(Int32 L_var1, Int32 L_var2)
{
Int32 result64_hi;
Int32 result64_lo;
__asm
{
smull result64_lo, result64_hi, L_var2, L_var1
mov result64_lo, result64_lo, lsr #26
add result64_hi, result64_lo, result64_hi, asl #6
}
return (result64_hi);
}
__inline Int32 fxp_mac32_Q32(Int32 L_add, Int32 L_var1, const Int32 L_var2)
{
__asm
{
smlal L_var1, L_add, L_var2, L_var1
}
return L_add;
}
__inline Int32 fxp_msb32_Q32(Int32 L_sub, Int32 L_var1, Int32 L_var2)
{
__asm
{
smull L_var2, L_var1, L_var2, L_var1
sub L_sub, L_sub, L_var1
}
return L_sub;
}
__inline Int32 fxp_mul32_Q29(const Int32 L_var1, const Int32 L_var2)
{
Int32 result64_hi;
Int32 result64_lo;
__asm
{
smull result64_lo, result64_hi, L_var2, L_var1
mov result64_lo, result64_lo, lsr #29
add result64_hi, result64_lo, result64_hi, asl #3
}
return (result64_hi);
}
__inline int32 pv_abs(int32 a)
{
Int32 b;
/*
b = a - (a<0);
a = b ^ sign(b)
*/
__asm
{
sub b, a, a, lsr #31
eor a, b, b, asr #31
}
return (a);
}
#endif
#ifdef __cplusplus
}
#endif
#endif /* PV_MP3DEC_FXD_OP_ARM */
|
