/*
* Copyright (C) 2008 The Android Open Source Project
*
* 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.
*/
/* ---- includes ----------------------------------------------------------- */
#include "b_TensorEm/Flt16Vec2D.h"
#include "b_TensorEm/Functions.h"
#include "b_BasicEm/Math.h"
#include "b_BasicEm/Memory.h"
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ auxiliary functions } ---------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ constructor / destructor } ----------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec2D_init( struct bts_Flt16Vec2D* ptrA )
{
ptrA->xE = 0;
ptrA->yE = 0;
ptrA->bbpE = 0;
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec2D_exit( struct bts_Flt16Vec2D* ptrA )
{
ptrA->xE = 0;
ptrA->yE = 0;
ptrA->bbpE = 0;
}
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ operators } -------------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec2D_copy( struct bts_Flt16Vec2D* ptrA, const struct bts_Flt16Vec2D* srcPtrA )
{
ptrA->bbpE = srcPtrA->bbpE;
ptrA->xE = srcPtrA->xE;
ptrA->yE = srcPtrA->yE;
}
/* ------------------------------------------------------------------------- */
flag bts_Flt16Vec2D_equal( const struct bts_Flt16Vec2D* ptrA, const struct bts_Flt16Vec2D* srcPtrA )
{
int32 bbpDiffL = ptrA->bbpE - srcPtrA->bbpE;
if( bbpDiffL == 0 )
{
if( ptrA->xE != srcPtrA->xE ) return FALSE;
if( ptrA->yE != srcPtrA->yE ) return FALSE;
return TRUE;
}
if( bbpDiffL > 0 )
{
int32 xL = ( int32 ) srcPtrA->xE << bbpDiffL;
int32 yL = ( int32 ) srcPtrA->yE << bbpDiffL;
if( ptrA->xE != xL ) return FALSE;
if( ptrA->yE != yL ) return FALSE;
/* check if bits were lost by the shifting */
if( srcPtrA->xE != ( xL >> bbpDiffL ) ) return FALSE;
if( srcPtrA->yE != ( yL >> bbpDiffL ) ) return FALSE;
return TRUE;
}
if( bbpDiffL < 0 )
{
int32 xL = ( int32 ) ptrA->xE << -bbpDiffL;
int32 yL = ( int32 ) ptrA->yE << -bbpDiffL;
if( xL != srcPtrA->xE ) return FALSE;
if( yL != srcPtrA->yE ) return FALSE;
/* check if bits were lost by the shifting */
if( ptrA->xE != ( xL >> -bbpDiffL ) ) return FALSE;
if( ptrA->yE != ( yL >> -bbpDiffL ) ) return FALSE;
return TRUE;
}
return TRUE;
}
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ query functions } -------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ modify functions } ------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ I/O } -------------------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ exec functions } --------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
struct bts_Flt16Vec2D bts_Flt16Vec2D_create16( int16 xA, int16 yA, int16 bbpA )
{
struct bts_Flt16Vec2D vecL;
vecL.xE = xA;
vecL.yE = yA;
vecL.bbpE = bbpA;
return vecL;
}
/* ------------------------------------------------------------------------- */
struct bts_Flt16Vec2D bts_Flt16Vec2D_createVec16( struct bts_Int16Vec2D vecA, int16 bbpA )
{
struct bts_Flt16Vec2D vecL;
vecL.xE = vecA.xE;
vecL.yE = vecA.yE;
vecL.bbpE = bbpA;
return vecL;
}
/* ------------------------------------------------------------------------- */
struct bts_Flt16Vec2D bts_Flt16Vec2D_create32( int32 xA, int32 yA, int32 bbpA )
{
struct bts_Flt16Vec2D vecL;
if( ( xA | yA ) == 0 )
{
vecL.xE = 0;
vecL.yE = 0;
vecL.bbpE = 0;
}
else
{
int32 shiftL = bts_maxAbsIntLog2Of2( xA, yA ) - 13;
if( shiftL > 0 )
{
int32 sh1L = shiftL - 1;
vecL.xE = ( ( xA >> sh1L ) + 1 ) >> 1;
vecL.yE = ( ( yA >> sh1L ) + 1 ) >> 1;
}
else
{
vecL.xE = xA << -shiftL;
vecL.yE = yA << -shiftL;
}
vecL.bbpE = bbpA - shiftL;
}
return vecL;
}
/* ------------------------------------------------------------------------- */
int32 bts_Flt16Vec2D_dotPrd( const struct bts_Flt16Vec2D* vec1PtrA,
const struct bts_Flt16Vec2D* vec2PtrA )
{
return ( int32 ) vec1PtrA->xE * vec2PtrA->xE + ( int32 ) vec1PtrA->yE * vec2PtrA->yE;
}
/* ------------------------------------------------------------------------- */
uint32 bts_Flt16Vec2D_norm2( const struct bts_Flt16Vec2D* ptrA )
{
return ( int32 ) ptrA->xE * ptrA->xE + ( int32 ) ptrA->yE * ptrA->yE;
}
/* ------------------------------------------------------------------------- */
uint16 bts_Flt16Vec2D_norm( const struct bts_Flt16Vec2D* ptrA )
{
return bbs_sqrt32( ( int32 ) ptrA->xE * ptrA->xE + ( int32 ) ptrA->yE * ptrA->yE );
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec2D_normalize( struct bts_Flt16Vec2D* ptrA )
{
int32 normL = bbs_sqrt32( ( int32 ) ptrA->xE * ptrA->xE + ( int32 ) ptrA->yE * ptrA->yE );
int32 xL = ( ( int32 ) ptrA->xE << 16 ) / normL;
int32 yL = ( ( int32 ) ptrA->yE << 16 ) / normL;
*ptrA = bts_Flt16Vec2D_create32( xL, yL, 16 );
}
/* ------------------------------------------------------------------------- */
struct bts_Flt16Vec2D bts_Flt16Vec2D_normalized( const struct bts_Flt16Vec2D* ptrA )
{
struct bts_Flt16Vec2D vecL = *ptrA;
bts_Flt16Vec2D_normalize( &vecL );
return vecL;
}
/* ------------------------------------------------------------------------- */
phase16 bts_Flt16Vec2D_angle( const struct bts_Flt16Vec2D* vecPtrA )
{
return bbs_phase16( vecPtrA->xE, vecPtrA->yE );
}
/* ------------------------------------------------------------------------- */
phase16 bts_Flt16Vec2D_enclosedAngle( const struct bts_Flt16Vec2D* vec1PtrA,
const struct bts_Flt16Vec2D* vec2PtrA )
{
int32 xL = ( int32 ) vec1PtrA->xE * vec2PtrA->xE + ( int32 ) vec1PtrA->yE * vec2PtrA->yE;
int32 yL = ( int32 ) vec1PtrA->yE * vec2PtrA->xE - ( int32 ) vec1PtrA->xE * vec2PtrA->yE;
return bbs_phase16( xL, yL );
}
/* ------------------------------------------------------------------------- */
struct bts_Flt16Vec2D bts_Flt16Vec2D_add( struct bts_Flt16Vec2D vec1A, struct bts_Flt16Vec2D vec2A )
{
int32 xL, yL, bbpL;
int32 shiftL = vec1A.bbpE - vec2A.bbpE;
if( shiftL > 0 )
{
xL = ( ( int32 ) vec2A.xE << shiftL ) + vec1A.xE;
yL = ( ( int32 ) vec2A.yE << shiftL ) + vec1A.yE;
bbpL = vec1A.bbpE;
}
else
{
xL = ( ( int32 ) vec1A.xE << -shiftL ) + vec2A.xE;
yL = ( ( int32 ) vec1A.yE << -shiftL ) + vec2A.yE;
bbpL = vec2A.bbpE;
}
return bts_Flt16Vec2D_create32( xL, yL, bbpL );
}
/* ------------------------------------------------------------------------- */
struct bts_Flt16Vec2D bts_Flt16Vec2D_sub( struct bts_Flt16Vec2D vec1A, struct bts_Flt16Vec2D vec2A )
{
int32 xL, yL, bbpL;
int32 shiftL = vec1A.bbpE - vec2A.bbpE;
if( shiftL > 0 )
{
xL = ( int32 ) vec1A.xE - ( ( int32 ) vec2A.xE << shiftL );
yL = ( int32 ) vec1A.yE - ( ( int32 ) vec2A.yE << shiftL );
bbpL = vec1A.bbpE;
}
else
{
xL = ( ( int32 ) vec1A.xE << -shiftL ) - vec2A.xE;
yL = ( ( int32 ) vec1A.yE << -shiftL ) - vec2A.yE;
bbpL = vec2A.bbpE;
}
return bts_Flt16Vec2D_create32( xL, yL, bbpL );
}
/* ------------------------------------------------------------------------- */
struct bts_Flt16Vec2D bts_Flt16Vec2D_mul( struct bts_Flt16Vec2D vecA, int16 factorA, int32 bbpFactorA )
{
int32 xL = ( int32 ) vecA.xE * factorA;
int32 yL = ( int32 ) vecA.yE * factorA;
return bts_Flt16Vec2D_create32( xL, yL, bbpFactorA + vecA.bbpE );
}
/* ------------------------------------------------------------------------- */
struct bts_Int16Vec2D bts_Flt16Vec2D_int16Vec2D( struct bts_Flt16Vec2D vecA, int32 dstBbpA )
{
struct bts_Int16Vec2D vecL;
int32 shiftL = vecA.bbpE - dstBbpA;
if( shiftL > 0 )
{
vecL.xE = ( ( vecA.xE >> ( shiftL - 1 ) ) + 1 ) >> 1;
vecL.yE = ( ( vecA.yE >> ( shiftL - 1 ) ) + 1 ) >> 1;
}
else
{
vecL.xE = vecA.xE << ( -shiftL );
vecL.yE = vecA.yE << ( -shiftL );
}
return vecL;
}
/* ========================================================================= */