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[/] [qaz_libs/] [trunk/] [cli/] [util/] [util_bits.c] - Blame information for rev 26
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qaztronic |
//////////////////////////////////////////////////////////////////////
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//// ////
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//// Copyright (C) 2015 Authors and OPENCORES.ORG ////
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//// ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer. ////
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//// ////
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//// This source file is free software; you can redistribute it ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any ////
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//// later version. ////
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//// ////
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//// This source is distributed in the hope that it will be ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// PURPOSE. See the GNU Lesser General Public License for more ////
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//// details. ////
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//// ////
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//// You should have received a copy of the GNU Lesser General ////
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//// Public License along with this source; if not, download it ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// ////
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//////////////////////////////////////////////////////////////////////
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qaztronic |
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#include "util_bits.h"
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/*-----------------------------------------------------------*/
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void inline
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util_set_bits
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(
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unsigned int address,
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unsigned int bit_offset,
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unsigned int bit_mask,
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unsigned int data
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)
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{
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volatile unsigned int *word_pointer = (volatile unsigned int *)(address);
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unsigned int buffer;
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data <<= bit_offset;
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data &= bit_mask;
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buffer = *word_pointer;
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buffer &= ~bit_mask;
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buffer |= data;
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*word_pointer = buffer;
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}
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/*-----------------------------------------------------------*/
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unsigned int inline
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util_get_bits
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(
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unsigned int address,
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unsigned int bit_offset,
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unsigned int bit_mask
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)
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{
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volatile unsigned int *word_pointer = (volatile unsigned int *)(address);
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unsigned int buffer;
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buffer = *word_pointer;
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buffer &= bit_mask;
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buffer >>= bit_offset;
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return(buffer);
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}
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/*-----------------------------------------------------------*/
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unsigned char ReverseBits7ops32bit(unsigned char v)
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{
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return ((v * 0x0802LU & 0x22110LU) |
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(v * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16;
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}
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