signextend.cpp

来自「基于4个mips核的noc设计」· C++ 代码 · 共 67 行

/*
 *  TU Eindhoven
 *  Eindhoven, The Netherlands
 *
 *  Name            :   signextend.h
 *
 *  Author          :   Sander Stuijk ([e-mail])
 *
 *  Date            :   July 23, 2002
 *
 *  Function        :   Sign extension
 *
 *  History         :
 *      23-07-02    :   Initial version.
 *      13-12-02    :   Synthesizable version [e-mail]
 *
 */

#include "signextend.h"

void SIGNEXTEND::signextend_thread()
{
	sc_bv<SIGNEXTENDBIT> a;
	sc_bv<DWORD> b;
	
	sc_bv<DWORD-SIGNEXTENDBIT> zero(0);
	
	//-> while (true) {
		#ifdef VERBOSE
			clog << "SIGNEXTEND" << endl;
		#endif
		
		a = in.read();
		
		b = (zero , a);
		
		for (unsigned int i = SIGNEXTENDBIT; i < DWORD; i++)
			b[i] = a[SIGNEXTENDBIT - 1];
		
		out.write(b);
		
		//-> wait();
//-> 	}
}

void SIGNEXTEND_BYTE::signextend_thread()
{
	sc_bv<DWORD> a;
	sc_bv<DWORD> b;
	
	//-> while (true) {
		#ifdef VERBOSE
			clog << "SIGNEXTEND BYTE" << endl;
		#endif
		
		a = in.read();
		
		b.range(7,0) = a.range(DWORD-1,DWORD-8);
		for (int i = 8; i < DWORD; i++)
          b[i] = a[DWORD - 1];
		
		out.write(b);
		
		//-> wait();
//-> 	}
}