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/*
** Copyright 2003-2010, VisualOn, Inc.
**
** 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.
*/
/*******************************************************************************
File: oper_32b.h
Content: Double precision operations
*******************************************************************************/
#ifndef __OPER_32b_H
#define __OPER_32b_H
#include "typedef.h"
#ifdef __cplusplus
extern "C" {
#endif
#define POW2_TABLE_BITS 8
#define POW2_TABLE_SIZE (1<<POW2_TABLE_BITS)
void L_Extract (Word32 L_32, Word16 *hi, Word16 *lo);
Word32 L_Comp (Word16 hi, Word16 lo);
Word32 Mpy_32 (Word16 hi1, Word16 lo1, Word16 hi2, Word16 lo2);
Word32 Mpy_32_16 (Word16 hi, Word16 lo, Word16 n);
Word32 Div_32 (Word32 L_num, Word32 denom);
Word16 iLog4(Word32 value);
Word32 rsqrt(Word32 value, Word32 accuracy);
Word32 pow2_xy(Word32 x, Word32 y);
__inline Word32 L_mpy_ls(Word32 L_var2, Word16 var1)
{
unsigned short swLow1;
Word16 swHigh1;
Word32 l_var_out;
swLow1 = (unsigned short)(L_var2);
swHigh1 = (Word16)(L_var2 >> 16);
l_var_out = (long)swLow1 * (long)var1 >> 15;
l_var_out += swHigh1 * var1 << 1;
return(l_var_out);
}
__inline Word32 L_mpy_wx(Word32 L_var2, Word16 var1)
{
#if ARMV5TE_L_MPY_LS
Word32 result;
asm volatile(
"SMULWB %[result], %[L_var2], %[var1] \n"
:[result]"+r"(result)
:[L_var2]"r"(L_var2), [var1]"r"(var1)
);
return result;
#else
unsigned short swLow1;
Word16 swHigh1;
Word32 l_var_out;
swLow1 = (unsigned short)(L_var2);
swHigh1 = (Word16)(L_var2 >> 16);
l_var_out = (long)swLow1 * (long)var1 >> 16;
l_var_out += swHigh1 * var1;
return(l_var_out);
#endif
}
#ifdef __cplusplus
}
#endif
#endif
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