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[/] [or1k/] [tags/] [start/] [gdb-5.0/] [sim/] [common/] [sim-n-bits.h] - Rev 579
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/* This file is part of the program psim. Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au> Copyright (C) 1997, Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef N #error "N must be #defined" #endif #include "symcat.h" #if defined(__STDC__) && defined(signed) /* If signed were defined to be say __signed (ie, some versions of Linux), then the signedN macro would not work correctly. If we have a standard compiler, we have signed. */ #undef signed #endif /* NOTE: See end of file for #undef */ #define unsignedN XCONCAT2(unsigned,N) #define signedN XCONCAT2(signed,N) #define LSMASKn XCONCAT2(LSMASK,N) #define MSMASKn XCONCAT2(MSMASK,N) #define LSMASKEDn XCONCAT2(LSMASKED,N) #define MSMASKEDn XCONCAT2(MSMASKED,N) #define LSEXTRACTEDn XCONCAT2(LSEXTRACTED,N) #define MSEXTRACTEDn XCONCAT2(MSEXTRACTED,N) #define LSINSERTEDn XCONCAT2(LSINSERTED,N) #define MSINSERTEDn XCONCAT2(MSINSERTED,N) #define ROTn XCONCAT2(ROT,N) #define ROTLn XCONCAT2(ROTL,N) #define ROTRn XCONCAT2(ROTR,N) #define MSSEXTn XCONCAT2(MSSEXT,N) #define LSSEXTn XCONCAT2(LSSEXT,N) /* TAGS: LSMASKED16 LSMASKED32 LSMASKED64 */ INLINE_SIM_BITS\ (unsignedN) LSMASKEDn (unsignedN word, int start, int stop) { word &= LSMASKn (start, stop); return word; } /* TAGS: MSMASKED16 MSMASKED32 MSMASKED64 */ INLINE_SIM_BITS\ (unsignedN) MSMASKEDn (unsignedN word, int start, int stop) { word &= MSMASKn (start, stop); return word; } /* TAGS: LSEXTRACTED16 LSEXTRACTED32 LSEXTRACTED64 */ INLINE_SIM_BITS\ (unsignedN) LSEXTRACTEDn (unsignedN val, int start, int stop) { val <<= (N - 1 - start); /* drop high bits */ val >>= (N - 1 - start) + (stop); /* drop low bits */ return val; } /* TAGS: MSEXTRACTED16 MSEXTRACTED32 MSEXTRACTED64 */ INLINE_SIM_BITS\ (unsignedN) MSEXTRACTEDn (unsignedN val, int start, int stop) { val <<= (start); /* drop high bits */ val >>= (start) + (N - 1 - stop); /* drop low bits */ return val; } /* TAGS: LSINSERTED16 LSINSERTED32 LSINSERTED64 */ INLINE_SIM_BITS\ (unsignedN) LSINSERTEDn (unsignedN val, int start, int stop) { val <<= stop; val &= LSMASKn (start, stop); return val; } /* TAGS: MSINSERTED16 MSINSERTED32 MSINSERTED64 */ INLINE_SIM_BITS\ (unsignedN) MSINSERTEDn (unsignedN val, int start, int stop) { val <<= ((N - 1) - stop); val &= MSMASKn (start, stop); return val; } /* TAGS: ROT16 ROT32 ROT64 */ INLINE_SIM_BITS\ (unsignedN) ROTn (unsignedN val, int shift) { if (shift > 0) return ROTRn (val, shift); else if (shift < 0) return ROTLn (val, -shift); else return val; } /* TAGS: ROTL16 ROTL32 ROTL64 */ INLINE_SIM_BITS\ (unsignedN) ROTLn (unsignedN val, int shift) { unsignedN result; ASSERT (shift <= N); result = (((val) << (shift)) | ((val) >> ((N)-(shift)))); return result; } /* TAGS: ROTR16 ROTR32 ROTR64 */ INLINE_SIM_BITS\ (unsignedN) ROTRn (unsignedN val, int shift) { unsignedN result; ASSERT (shift <= N); result = (((val) >> (shift)) | ((val) << ((N)-(shift)))); return result; } /* TAGS: LSSEXT16 LSSEXT32 LSSEXT64 */ INLINE_SIM_BITS\ (unsignedN) LSSEXTn (signedN val, int sign_bit) { int shift; /* make the sign-bit most significant and then smear it back into position */ ASSERT (sign_bit < N); shift = ((N - 1) - sign_bit); val <<= shift; val >>= shift; return val; } /* TAGS: MSSEXT16 MSSEXT32 MSSEXT64 */ INLINE_SIM_BITS\ (unsignedN) MSSEXTn (signedN val, int sign_bit) { /* make the sign-bit most significant and then smear it back into position */ ASSERT (sign_bit < N); val <<= sign_bit; val >>= sign_bit; return val; } /* NOTE: See start of file for #define */ #undef LSSEXTn #undef MSSEXTn #undef ROTLn #undef ROTRn #undef ROTn #undef LSINSERTEDn #undef MSINSERTEDn #undef LSEXTRACTEDn #undef MSEXTRACTEDn #undef LSMASKEDn #undef LSMASKn #undef MSMASKEDn #undef MSMASKn #undef signedN #undef unsignedN
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