/*
* 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/Flt16Vec.h"
#include "b_BasicEm/Memory.h"
#include "b_BasicEm/Math.h"
#include "b_BasicEm/Functions.h"
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ auxiliary functions } ---------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ constructor / destructor } ----------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_init( struct bbs_Context* cpA,
struct bts_Flt16Vec* ptrA )
{
bbs_Int16Arr_init( cpA, &ptrA->arrE );
ptrA->expE = 0;
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_exit( struct bbs_Context* cpA,
struct bts_Flt16Vec* ptrA )
{
bbs_Int16Arr_exit( cpA, &ptrA->arrE );
ptrA->expE = 0;
}
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ operators } -------------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_copy( struct bbs_Context* cpA,
struct bts_Flt16Vec* ptrA,
const struct bts_Flt16Vec* srcPtrA )
{
bbs_Int16Arr_copy( cpA, &ptrA->arrE, &srcPtrA->arrE );
ptrA->expE = srcPtrA->expE;
}
/* ------------------------------------------------------------------------- */
flag bts_Flt16Vec_equal( struct bbs_Context* cpA,
const struct bts_Flt16Vec* ptrA,
const struct bts_Flt16Vec* srcPtrA )
{
if( !bbs_Int16Arr_equal( cpA, &ptrA->arrE, &srcPtrA->arrE ) ) return FALSE;
if( ptrA->expE != srcPtrA->expE ) return FALSE;
return TRUE;
}
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ query functions } -------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
int16 bts_Flt16Vec_avg( struct bbs_Context* cpA, const struct bts_Flt16Vec* ptrA )
{
uint16 iL;
uint16 sizeL = ptrA->arrE.sizeE;
int32 sumL = 0;
const int16* srcL = ptrA->arrE.arrPtrE;
for( iL = 0; iL < sizeL; iL++ )
{
sumL += srcL[ iL ];
}
return sumL / ( int32 )sizeL;
}
/* ------------------------------------------------------------------------- */
uint32 bts_Flt16Vec_norm( struct bbs_Context* cpA, const struct bts_Flt16Vec* ptrA )
{
return bbs_vecNorm16( ptrA->arrE.arrPtrE, ptrA->arrE.sizeE );
}
/* ------------------------------------------------------------------------- */
uint16 bts_Flt16Vec_maxAbs( struct bbs_Context* cpA, const struct bts_Flt16Vec* ptrA )
{
uint16 iL;
uint16 sizeL = ptrA->arrE.sizeE;
uint16 maxL = 0;
const int16* srcL = ptrA->arrE.arrPtrE;
for( iL = 0; iL < sizeL; iL++ )
{
uint16 vL = srcL[ iL ] > 0 ? srcL[ iL ] : -srcL[ iL ];
maxL = vL > maxL ? vL : maxL;
}
return maxL;
}
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ modify functions } ------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_create( struct bbs_Context* cpA,
struct bts_Flt16Vec* ptrA,
uint32 sizeA,
struct bbs_MemSeg* mspA )
{
bbs_Int16Arr_create( cpA, &ptrA->arrE, sizeA, mspA );
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_size( struct bbs_Context* cpA,
struct bts_Flt16Vec* ptrA,
uint32 sizeA )
{
bbs_Int16Arr_size( cpA, &ptrA->arrE, sizeA );
}
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ I/O } -------------------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
uint32 bts_Flt16Vec_memSize( struct bbs_Context* cpA,
const struct bts_Flt16Vec *ptrA )
{
return bbs_SIZEOF16( uint32 ) /* mem size */
+ bbs_Int16Arr_memSize( cpA, &ptrA->arrE )
+ bbs_SIZEOF16( ptrA->expE );
}
/* ------------------------------------------------------------------------- */
uint32 bts_Flt16Vec_memWrite( struct bbs_Context* cpA,
const struct bts_Flt16Vec* ptrA,
uint16* memPtrA )
{
uint32 memSizeL = bts_Flt16Vec_memSize( cpA, ptrA );
memPtrA += bbs_memWrite32( &memSizeL, memPtrA );
memPtrA += bbs_Int16Arr_memWrite( cpA, &ptrA->arrE, memPtrA );
memPtrA += bbs_memWrite16( &ptrA->expE, memPtrA );
return memSizeL;
}
/* ------------------------------------------------------------------------- */
uint32 bts_Flt16Vec_memRead( struct bbs_Context* cpA,
struct bts_Flt16Vec* ptrA,
const uint16* memPtrA,
struct bbs_MemSeg* mspA )
{
uint32 memSizeL;
if( bbs_Context_error( cpA ) ) return 0;
memPtrA += bbs_memRead32( &memSizeL, memPtrA );
memPtrA += bbs_Int16Arr_memRead( cpA, &ptrA->arrE, memPtrA, mspA );
memPtrA += bbs_memRead16( &ptrA->expE, memPtrA );
if( memSizeL != bts_Flt16Vec_memSize( cpA, ptrA ) )
{
bbs_ERR0( bbs_ERR_CORRUPT_DATA, "uint32 bts_Flt16Vec_memRead( const struct bts_Flt16Vec* ptrA, const void* memPtrA ):\n"
"size mismatch" );
return 0;
}
return memSizeL;
}
/* ------------------------------------------------------------------------- */
/* ========================================================================= */
/* */
/* ---- \ghd{ exec functions } --------------------------------------------- */
/* */
/* ========================================================================= */
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_maximizeMantisse( struct bbs_Context* cpA, struct bts_Flt16Vec* ptrA )
{
uint32 maxAbsL = bts_Flt16Vec_maxAbs( cpA, ptrA );
int16 shlL = 0;
if( maxAbsL == 0 ) return; /* cannot maximize 0 */
while( maxAbsL < 0x4000 )
{
shlL++;
maxAbsL <<= 1;
}
if( shlL > 0 )
{
uint32 iL;
uint32 sizeL = ptrA->arrE.sizeE;
int16* dstL = ptrA->arrE.arrPtrE;
for( iL = 0; iL < sizeL; iL++ ) dstL[ iL ] <<= shlL;
ptrA->expE -= shlL;
}
}
/* ------------------------------------------------------------------------- */
uint32 bts_Flt16Vec_maximizeAbsValue( struct bbs_Context* cpA, struct bts_Flt16Vec* ptrA )
{
int32 maxAbsL = bts_Flt16Vec_maxAbs( cpA, ptrA );
int32 fL;
if( maxAbsL == 0 ) return 0; /* vector is zero */
fL = ( int32 )0x7FFF0000 / maxAbsL;
{
uint32 iL;
uint32 sizeL = ptrA->arrE.sizeE;
int16* dstL = ptrA->arrE.arrPtrE;
for( iL = 0; iL < sizeL; iL++ ) dstL[ iL ] = ( ( int32 )dstL[ iL ] * fL + 32768 ) >> 16;
}
return fL;
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_zeroAverage( struct bbs_Context* cpA, struct bts_Flt16Vec* ptrA )
{
uint16 iL;
uint16 sizeL = ptrA->arrE.sizeE;
int16* dstL = ptrA->arrE.arrPtrE;
int16 avgL = bts_Flt16Vec_avg( cpA, ptrA );
for( iL = 0; iL < sizeL; iL++ ) dstL[ iL ] -= avgL;
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_normalize( struct bbs_Context* cpA, struct bts_Flt16Vec* ptrA )
{
uint32 normL = bts_Flt16Vec_norm( cpA, ptrA );
if( normL == 0 )
{
/* vector is zero - do nothing */
return;
}
else
{
int16* dstL = ptrA->arrE.arrPtrE;
uint16 iL;
uint16 sizeL = ptrA->arrE.sizeE;
int16 expL = 0;
int32 fL;
/* let norm occupy 17 bits */
if( ( normL & 0xFFFE0000 ) != 0 )
{
while( ( ( normL >> -expL ) & 0xFFFE0000 ) != 0 ) expL--;
normL >>= -expL;
}
else
{
while( ( ( normL << expL ) & 0xFFFF0000 ) == 0 ) expL++;
normL <<= expL;
}
/* fL is positive and occupies only 16 bits - a product with int16 fits in int32 */
fL = ( uint32 )0xFFFFFFFF / normL;
/* multiply with factor */
for( iL = 0; iL < sizeL; iL++ ) dstL[ iL ] = ( ( ( ( int32 )dstL[ iL ] * fL ) >> 15 ) + 1 ) >> 1;
/* set exponent */
ptrA->expE = expL - 16;
}
/*
{
uint32 testNormL = bts_Flt16Vec_norm( cpA, ptrA );
printf( "test norm %f\n", ( float )testNormL / ( 1 << -ptrA->expE ) );
}
*/
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_setZero( struct bbs_Context* cpA, struct bts_Flt16Vec* ptrA )
{
bbs_Int16Arr_fill( cpA, &ptrA->arrE, 0 );
ptrA->expE = 0;
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_mul( struct bbs_Context* cpA, struct bts_Flt16Vec* ptrA, int32 valA, int16 expA )
{
int32 valL = valA;
int16 expL = expA;
if( valL == 0 )
{
bts_Flt16Vec_setZero( cpA, ptrA );
return;
}
else
{
uint32 iL;
uint32 sizeL = ptrA->arrE.sizeE;
int16* dstL = ptrA->arrE.arrPtrE;
/* adjust valL to maximum 16 bit accuracy */
uint32 absValL = valL > 0 ? valL : -valL;
if( ( absValL & 0xFFFF8000 ) != 0 )
{
int32 shrL = 0;
while( ( absValL & 0xFFFF8000 ) != 0 )
{
absValL >>= 1;
shrL++;
}
if( shrL > 0 )
{
valL = ( ( valL >> ( shrL - 1 ) ) + 1 ) >> 1;
expL += shrL;
if( valL >= 0x08000 ) valL = 0x07FFF; /* saturate */
}
}
else
{
int32 shlL = 0;
while( ( absValL & 0xFFFFC000 ) == 0 )
{
absValL <<= 1;
shlL++;
}
valL <<= shlL;
expL -= shlL;
}
for( iL = 0; iL < sizeL; iL++ )
{
dstL[ iL ] = ( ( ( ( int32 )dstL[ iL ] * valL ) >> 15 ) + 1 ) >> 1;
}
ptrA->expE += expL + 16;
}
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_dotPtrd( struct bbs_Context* cpA, struct bts_Flt16Vec* vp1A, struct bts_Flt16Vec* vp2A, int32* manPtrA, int32* expPtrA )
{
bbs_DEF_fNameL( "void bts_Flt16Vec_dotPtrd( struct bbs_Context* cpA, struct bts_Flt16Vec* vp1A, struct bts_Flt16Vec* vp2A, int32* matPtrA, int32* expPtrA )" )
uint16 iL;
uint16 sizeL = vp1A->arrE.sizeE;
const int16* arr1L = vp1A->arrE.arrPtrE;
const int16* arr2L = vp2A->arrE.arrPtrE;
int16 shrm1L = -1; /* shift minus 1 */
int32 sumL;
if( vp1A->arrE.sizeE != vp2A->arrE.sizeE )
{
bbs_ERROR1( "%s:\nVectors have different size", fNameL );
return;
}
sumL = 0;
/* shrm1L == -1 */
for( iL = 0; iL < sizeL; iL++ )
{
sumL += ( int32 )arr1L[ iL ] * ( int32 )arr2L[ iL ];
if( ( ( ( sumL > 0 ) ? sumL : -sumL ) & 0xC0000000 ) != 0 ) break;
}
if( iL < sizeL )
{
/* danger of overflow: increase shift; adjust sum */
shrm1L++;
sumL = ( ( sumL >> 1 ) + 1 ) >> 1;
/* shrm1L == 0 */
for( iL = 0; iL < sizeL; iL++ )
{
sumL += ( int32 )( ( arr1L[ iL ] + 1 ) >> 1 ) * ( int32 )( ( arr2L[ iL ] + 1 ) >> 1 );
if( ( ( ( sumL > 0 ) ? sumL : -sumL ) & 0xC0000000 ) != 0 ) break;
}
for( iL = 0; iL < sizeL; iL++ )
{
if( ( ( ( sumL > 0 ) ? sumL : -sumL ) & 0xC0000000 ) != 0 )
{
/* danger of overflow: increase shift; adjust sum */
shrm1L++;
sumL = ( ( sumL >> 1 ) + 1 ) >> 1;
}
sumL += ( int32 )( ( ( arr1L[ iL ] >> shrm1L ) + 1 ) >> 1 ) * ( int32 )( ( ( arr2L[ iL ] >> shrm1L ) + 1 ) >> 1 );
}
}
if( manPtrA != NULL ) *manPtrA = sumL;
if( expPtrA != NULL ) *expPtrA = vp1A->expE + vp2A->expE + ( ( shrm1L + 1 ) << 1 );
}
/* ------------------------------------------------------------------------- */
void bts_Flt16Vec_append( struct bbs_Context* cpA, struct bts_Flt16Vec* ptrA, struct bts_Flt16Vec* srcPtrA )
{
if( ptrA->arrE.sizeE == 0 )
{
bts_Flt16Vec_copy( cpA, ptrA, srcPtrA );
}
else
{
uint32 idxL = ptrA->arrE.sizeE;
bts_Flt16Vec_size( cpA, ptrA, idxL + srcPtrA->arrE.sizeE );
/* copy data */
bbs_memcpy16( ptrA->arrE.arrPtrE + idxL, srcPtrA->arrE.arrPtrE, srcPtrA->arrE.sizeE );
/* equalize exponent */
if( ptrA->expE > srcPtrA->expE )
{
uint32 iL;
uint32 sizeL = srcPtrA->arrE.sizeE;
uint32 shrL = ptrA->expE - srcPtrA->expE;
int16* dstL = ptrA->arrE.arrPtrE + idxL;
for( iL = 0; iL < sizeL; iL++ ) dstL[ iL ] = ( ( dstL[ iL ] >> ( shrL - 1 ) ) + 1 ) >> 1;
}
else if( ptrA->expE < srcPtrA->expE )
{
uint32 iL;
uint32 sizeL = idxL;
uint32 shrL = srcPtrA->expE - ptrA->expE;
int16* dstL = ptrA->arrE.arrPtrE;
for( iL = 0; iL < sizeL; iL++ ) dstL[ iL ] = ( ( dstL[ iL ] >> ( shrL - 1 ) ) + 1 ) >> 1;
ptrA->expE = srcPtrA->expE;
}
}
}
/* ------------------------------------------------------------------------- */
/* ========================================================================= */