165 lines
3.3 KiB
C
165 lines
3.3 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
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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 _SIM_BITS_C_
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#define _SIM_BITS_C_
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#include "sim-basics.h"
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#include "sim-assert.h"
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#include "sim-io.h"
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INLINE_SIM_BITS\
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(unsigned_word)
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LSMASKED (unsigned_word val,
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int start,
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int stop)
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{
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/* NOTE - start, stop can wrap */
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val &= LSMASK (start, stop);
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return val;
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}
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INLINE_SIM_BITS\
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(unsigned_word)
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MSMASKED (unsigned_word val,
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int start,
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int stop)
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{
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/* NOTE - start, stop can wrap */
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val &= MSMASK (start, stop);
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return val;
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}
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INLINE_SIM_BITS\
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(unsigned_word)
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LSEXTRACTED (unsigned_word val,
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int start,
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int stop)
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{
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ASSERT (start >= stop);
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#if (WITH_TARGET_WORD_BITSIZE == 64)
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return LSEXTRACTED64 (val, start, stop);
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#endif
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#if (WITH_TARGET_WORD_BITSIZE == 32)
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if (stop >= 32)
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return 0;
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else
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{
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if (start < 32)
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val &= LSMASK (start, 0);
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val >>= stop;
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return val;
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}
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#endif
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}
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INLINE_SIM_BITS\
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(unsigned_word)
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MSEXTRACTED (unsigned_word val,
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int start,
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int stop)
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{
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ASSERT (start <= stop);
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#if (WITH_TARGET_WORD_BITSIZE == 64)
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return MSEXTRACTED64 (val, start, stop);
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#endif
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#if (WITH_TARGET_WORD_BITSIZE == 32)
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if (stop < 32)
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return 0;
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else
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{
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if (start >= 32)
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val &= MSMASK (start, 64 - 1);
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val >>= (64 - stop - 1);
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return val;
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}
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#endif
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}
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INLINE_SIM_BITS\
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(unsigned_word)
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INSERTED (unsigned_word val,
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int start,
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int stop)
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{
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ASSERT ((WITH_TARGET_WORD_MSB == 0 && start <= stop)
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|| (WITH_TARGET_WORD_MSB != 0 && start >= stop));
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#if (WITH_TARGET_WORD_BITSIZE == 64)
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return INSERTED64 (val, start, stop);
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#endif
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#if (WITH_TARGET_WORD_BITSIZE == 32)
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/* Bit numbers are 0..63, even for 32 bit targets.
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On 32 bit targets we ignore 0..31. */
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if (_LSB_SHIFT (64, stop) >= 32)
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return 0;
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else
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{
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val &= LSMASK (_MAKE_WIDTH (start, stop), 0);
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val <<= _LSB_SHIFT (64, stop);
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return val;
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}
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#endif
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}
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INLINE_SIM_BITS\
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(unsigned_word)
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SEXT (signed_word val,
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int 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 < 64);
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#if (WITH_TARGET_WORD_BITSIZE == 64)
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return SEXT64 (val, sign_bit);
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#endif
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#if (WITH_TARGET_WORD_BITSIZE == 32)
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if (_MSB_SHIFT (64, sign_bit) < 32)
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return val;
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else {
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val <<= (_MSB_SHIFT (64, sign_bit) - 32);
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val >>= (_MSB_SHIFT (64, sign_bit) - 32);
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return val;
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}
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#endif
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}
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#define N 16
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#include "sim-n-bits.h"
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#undef N
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#define N 32
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#include "sim-n-bits.h"
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#undef N
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#define N 64
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#include "sim-n-bits.h"
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#undef N
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#endif /* _SIM_BITS_C_ */
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