195 lines
4.0 KiB
C
195 lines
4.0 KiB
C
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/*************************************************************************
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* *
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* YAP Prolog %W% %G% *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: Tags_32Ops.h.m4 *
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* Last rev: December 90 *
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* mods: *
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* comments: Original Tag Scheme for machines with 32 bits adresses *
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* version: $Id: Tags_64bits.h,v 1.3 2008-05-15 13:41:46 vsc Exp $ *
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*************************************************************************/
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#if SIZEOF_INT_P==8
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#define TAG_64BITS 1
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/* Version for 64 bit addresses machines,
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Each term is represented internally as an unsigned 64 bit integer as
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follows:
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tag value
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ints 0m1....001 numeric value
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atoms 0m0....001 offset of atom entry
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pairs 0mr....011 ptr to pair
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aplied functor 0mr....101 ptr to functor followed by args
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undefined 0mr....000 address of cell pointing to itself
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functors are represented as ptrs to the functor entry in the atom
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property list
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We rely on the fact that addresses are always multiple of 8.
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*/
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#define SHIFT_HIGH_TAG 61
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#define MKTAG(HI,LO) ((((UInt) (HI))<<SHIFT_HIGH_TAG)|(LO))
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#define TagBits /* 0x70000007L */ MKTAG(0x7,7)
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#define LowTagBits /* 0x00000007L */ MKTAG(0x0,7)
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#define HighTagBits /* 0x70000000L */ MKTAG(0x7,0)
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#define AdrHiBit /* 0x08000000L */ (((UInt)1) << (SHIFT_HIGH_TAG-3))
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#define MaskPrim /* 0x0ffffff8L */ (((((UInt)1) << (SHIFT_HIGH_TAG-3))-1)<<3)
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#define NumberTag /* 0x30000001L */ MKTAG(0x1,1)
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#define AtomTag /* 0x10000001L */ MKTAG(0x0,1)
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#define MAX_ABS_INT /* 0xfe00000LL */ ((((Int)1) << (63-(3+3)))<<3)
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/* bits that should not be used by anyone but us */
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#define YAP_PROTECTED_MASK 0xe000000000000000L
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#define UNIQUE_TAG_FOR_PAIRS 1
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#define PrimiBit /* 0x00000001L */ 1
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#define PairBits /* 0x00000003L */ 3
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#define ApplBits /* 0x00000005L */ 5
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#define PrimiBits /* 0x70000004L */ MKTAG(0x7,7)
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#define NumberMask /* 0x20000007L */ MKTAG(0x2,7)
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#define TagOf(t) (Unsigned(t)&TagBits)
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#define LowTagOf(t) (Unsigned(t)&LowTagBits)
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#define NonTagPart(X) (Signed(X) & MaskPrim)
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#define TAGGEDA(TAG,V) (Unsigned(TAG) | Unsigned(V))
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#define TAGGED(TAG,V) (Unsigned(TAG) | NonTagPart(Unsigned(V)<<3)) /* SQRT(8) */
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#define NONTAGGED(TAG,V) NonTagPart(Unsigned(V)<<3) /* SQRT(8) */
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#define CHKTAG(t,Tag) ((Unsigned(t)&TagBits)==Tag)
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#include "inline-only.h"
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INLINE_ONLY int IsVarTerm (Term);
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INLINE_ONLY int
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IsVarTerm (Term t)
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{
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return (int) ((!((t) & 0x1)));
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}
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INLINE_ONLY int IsNonVarTerm (Term);
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INLINE_ONLY int
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IsNonVarTerm (Term t)
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{
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return (int) (((t) & 0x1));
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}
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INLINE_ONLY Term *RepPair (Term);
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INLINE_ONLY Term *
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RepPair (Term t)
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{
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return (Term *) (((t) - PairBits));
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}
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INLINE_ONLY Term AbsPair (Term *);
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INLINE_ONLY Term
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AbsPair (Term * p)
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{
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return (Term) (((CELL) (p) + PairBits));
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}
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INLINE_ONLY Int IsPairTerm (Term);
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INLINE_ONLY Int
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IsPairTerm (Term t)
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{
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return (Int) (((t) & 0x2));
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}
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INLINE_ONLY Term *RepAppl (Term);
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INLINE_ONLY Term *
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RepAppl (Term t)
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{
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return (Term *) (((t) - ApplBits));
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}
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INLINE_ONLY Term AbsAppl (Term *);
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INLINE_ONLY Term
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AbsAppl (Term * p)
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{
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return (Term) (((CELL) (p) + ApplBits));
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}
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INLINE_ONLY Int IsApplTerm (Term);
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INLINE_ONLY Int
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IsApplTerm (Term t)
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{
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return (Int) ((((t) & 0x4)));
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}
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INLINE_ONLY Int IsAtomOrIntTerm (Term);
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INLINE_ONLY Int
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IsAtomOrIntTerm (Term t)
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{
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return (Int) ((((t) & LowTagBits) == 0x1));
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}
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INLINE_ONLY Term AdjustPtr (Term t, Term off);
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INLINE_ONLY Term
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AdjustPtr (Term t, Term off)
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{
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return (Term) (((t) + off));
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}
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INLINE_ONLY Term AdjustIDBPtr (Term t, Term off);
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INLINE_ONLY Term
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AdjustIDBPtr (Term t, Term off)
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{
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return (Term) ((t) + off);
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}
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INLINE_ONLY Int IntOfTerm (Term);
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INLINE_ONLY Int
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IntOfTerm (Term t)
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{
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return (Int) ((Int) (Unsigned (t) << 3) >> 6);
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}
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#endif /* 64 Bits */
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