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90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
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** Copyright 2003-2010, VisualOn, Inc.
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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/*******************************************************************************
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File: oper_32b.h
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Content: Double precision operations
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*******************************************************************************/
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#ifndef __OPER_32b_H
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#define __OPER_32b_H
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#include "typedef.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define POW2_TABLE_BITS 8
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#define POW2_TABLE_SIZE (1<<POW2_TABLE_BITS)
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void L_Extract (Word32 L_32, Word16 *hi, Word16 *lo);
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Word32 L_Comp (Word16 hi, Word16 lo);
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Word32 Mpy_32 (Word16 hi1, Word16 lo1, Word16 hi2, Word16 lo2);
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Word32 Mpy_32_16 (Word16 hi, Word16 lo, Word16 n);
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Word32 Div_32 (Word32 L_num, Word32 denom);
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Word16 iLog4(Word32 value);
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Word32 rsqrt(Word32 value, Word32 accuracy);
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Word32 pow2_xy(Word32 x, Word32 y);
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__inline Word32 L_mpy_ls(Word32 L_var2, Word16 var1)
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{
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unsigned short swLow1;
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Word16 swHigh1;
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Word32 l_var_out;
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swLow1 = (unsigned short)(L_var2);
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swHigh1 = (Word16)(L_var2 >> 16);
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l_var_out = (long)swLow1 * (long)var1 >> 15;
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l_var_out += swHigh1 * var1 << 1;
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return(l_var_out);
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}
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__inline Word32 L_mpy_wx(Word32 L_var2, Word16 var1)
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{
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#if ARMV5TE_L_MPY_LS
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Word32 result;
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asm volatile(
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"SMULWB %[result], %[L_var2], %[var1] \n"
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:[result]"=r"(result)
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:[L_var2]"r"(L_var2), [var1]"r"(var1)
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);
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return result;
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#else
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unsigned short swLow1;
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Word16 swHigh1;
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Word32 l_var_out;
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swLow1 = (unsigned short)(L_var2);
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swHigh1 = (Word16)(L_var2 >> 16);
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l_var_out = (long)swLow1 * (long)var1 >> 16;
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l_var_out += swHigh1 * var1;
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return(l_var_out);
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#endif
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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