172 lines
3.5 KiB
C
172 lines
3.5 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
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Copyright (C) 1997, Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef N
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#error "N must be #defined"
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#endif
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#include "sim-xcat.h"
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#ifdef __STDC__
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/* If signed were defined to be say __signed (ie, some versions of Linux),
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then the signedN macro would not work correctly. If we have a standard
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compiler, we have signed. */
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#undef signed
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#endif
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/* NOTE: See end of file for #undef */
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#define unsignedN XCONCAT2(unsigned,N)
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#define signedN XCONCAT2(signed,N)
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#define MASKEDn XCONCAT2(MASKED,N)
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#define MASKn XCONCAT2(MASK,N)
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#define LSMASKEDn XCONCAT2(LSMASKED,N)
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#define LSMASKn XCONCAT2(LSMASK,N)
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#define MSMASKEDn XCONCAT2(MSMASKED,N)
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#define MSMASKn XCONCAT2(MSMASK,N)
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#define EXTRACTEDn XCONCAT2(EXTRACTED,N)
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#define INSERTEDn XCONCAT2(INSERTED,N)
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#define ROTn XCONCAT2(ROT,N)
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#define ROTLn XCONCAT2(ROTL,N)
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#define ROTRn XCONCAT2(ROTR,N)
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#define SEXTn XCONCAT2(SEXT,N)
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INLINE_SIM_BITS\
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(unsignedN)
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MASKEDn (unsignedN word,
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unsigned start,
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unsigned stop)
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{
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return (word & MASKn (start, stop));
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}
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INLINE_SIM_BITS\
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(unsignedN)
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LSMASKEDn (unsignedN word,
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unsigned nr_bits)
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{
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return (word & LSMASKn (nr_bits));
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}
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INLINE_SIM_BITS\
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(unsignedN)
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MSMASKEDn (unsignedN word,
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unsigned nr_bits)
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{
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return (word & MSMASKn (nr_bits));
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}
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INLINE_SIM_BITS\
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(unsignedN)
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EXTRACTEDn (unsignedN val,
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unsigned start,
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unsigned stop)
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{
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val <<= _MSB_SHIFT (N, start);
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val >>= (_MSB_SHIFT (N, start) + _LSB_SHIFT (N, stop));
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return val;
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}
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INLINE_SIM_BITS\
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(unsignedN)
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INSERTEDn (unsignedN val,
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unsigned start,
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unsigned stop)
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{
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val &= LSMASKn (_MAKE_WIDTH (start, stop));
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val <<= _LSB_SHIFT (N, stop);
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return val;
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}
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INLINE_SIM_BITS\
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(unsignedN)
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ROTn (unsignedN val,
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int shift)
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{
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if (shift > 0)
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return ROTRn (val, shift);
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else if (shift < 0)
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return ROTLn (val, -shift);
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else
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return val;
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}
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INLINE_SIM_BITS\
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(unsignedN)
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ROTLn (unsignedN val,
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unsigned shift)
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{
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unsignedN result;
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ASSERT (shift <= N);
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result = (((val) << (shift)) | ((val) >> ((N)-(shift))));
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return result;
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}
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INLINE_SIM_BITS\
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(unsignedN)
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ROTRn (unsignedN val,
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unsigned shift)
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{
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unsignedN result;
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ASSERT (shift <= N);
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result = (((val) >> (shift)) | ((val) << ((N)-(shift))));
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return result;
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}
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INLINE_SIM_BITS\
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(unsignedN)
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SEXTn (signedN val,
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unsigned sign_bit)
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{
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/* make the sign-bit most significant and then smear it back into
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position */
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ASSERT (sign_bit < N);
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val <<= _MSB_SHIFT (N, sign_bit);
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val >>= _MSB_SHIFT (N, sign_bit);
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return val;
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}
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/* NOTE: See start of file for #define */
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#undef SEXTn
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#undef ROTLn
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#undef ROTRn
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#undef ROTn
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#undef INSERTEDn
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#undef EXTRACTEDn
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#undef LSMASKEDn
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#undef LSMASKn
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#undef MSMASKEDn
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#undef MSMASKn
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#undef MASKn
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#undef MASKEDn
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#undef signedN
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#undef unsignedN
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