209 строки
6.5 KiB
C
209 строки
6.5 KiB
C
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/* Software floating-point emulation.
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Definitions for IEEE Quad Precision.
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Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Richard Henderson (rth@cygnus.com),
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Jakub Jelinek (jj@ultra.linux.cz),
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David S. Miller (davem@redhat.com) and
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Peter Maydell (pmaydell@chiark.greenend.org.uk).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef __MATH_EMU_QUAD_H__
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#define __MATH_EMU_QUAD_H__
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#if _FP_W_TYPE_SIZE < 32
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#error "Here's a nickel, kid. Go buy yourself a real computer."
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#endif
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#if _FP_W_TYPE_SIZE < 64
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#define _FP_FRACTBITS_Q (4*_FP_W_TYPE_SIZE)
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#else
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#define _FP_FRACTBITS_Q (2*_FP_W_TYPE_SIZE)
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#endif
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#define _FP_FRACBITS_Q 113
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#define _FP_FRACXBITS_Q (_FP_FRACTBITS_Q - _FP_FRACBITS_Q)
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#define _FP_WFRACBITS_Q (_FP_WORKBITS + _FP_FRACBITS_Q)
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#define _FP_WFRACXBITS_Q (_FP_FRACTBITS_Q - _FP_WFRACBITS_Q)
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#define _FP_EXPBITS_Q 15
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#define _FP_EXPBIAS_Q 16383
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#define _FP_EXPMAX_Q 32767
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#define _FP_QNANBIT_Q \
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((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-2) % _FP_W_TYPE_SIZE)
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#define _FP_IMPLBIT_Q \
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((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-1) % _FP_W_TYPE_SIZE)
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#define _FP_OVERFLOW_Q \
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((_FP_W_TYPE)1 << (_FP_WFRACBITS_Q % _FP_W_TYPE_SIZE))
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#if _FP_W_TYPE_SIZE < 64
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union _FP_UNION_Q
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{
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long double flt;
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struct
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{
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned sign : 1;
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unsigned exp : _FP_EXPBITS_Q;
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unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
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unsigned long frac2 : _FP_W_TYPE_SIZE;
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unsigned long frac1 : _FP_W_TYPE_SIZE;
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unsigned long frac0 : _FP_W_TYPE_SIZE;
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#else
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unsigned long frac0 : _FP_W_TYPE_SIZE;
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unsigned long frac1 : _FP_W_TYPE_SIZE;
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unsigned long frac2 : _FP_W_TYPE_SIZE;
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unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
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unsigned exp : _FP_EXPBITS_Q;
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unsigned sign : 1;
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#endif /* not bigendian */
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} bits __attribute__((packed));
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};
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#define FP_DECL_Q(X) _FP_DECL(4,X)
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#define FP_UNPACK_RAW_Q(X,val) _FP_UNPACK_RAW_4(Q,X,val)
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#define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_4_P(Q,X,val)
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#define FP_PACK_RAW_Q(val,X) _FP_PACK_RAW_4(Q,val,X)
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#define FP_PACK_RAW_QP(val,X) \
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do { \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_4_P(Q,val,X); \
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} while (0)
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#define FP_UNPACK_Q(X,val) \
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do { \
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_FP_UNPACK_RAW_4(Q,X,val); \
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_FP_UNPACK_CANONICAL(Q,4,X); \
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} while (0)
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#define FP_UNPACK_QP(X,val) \
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do { \
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_FP_UNPACK_RAW_4_P(Q,X,val); \
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_FP_UNPACK_CANONICAL(Q,4,X); \
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} while (0)
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#define FP_PACK_Q(val,X) \
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do { \
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_FP_PACK_CANONICAL(Q,4,X); \
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_FP_PACK_RAW_4(Q,val,X); \
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} while (0)
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#define FP_PACK_QP(val,X) \
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do { \
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_FP_PACK_CANONICAL(Q,4,X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_4_P(Q,val,X); \
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} while (0)
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#define FP_ISSIGNAN_Q(X) _FP_ISSIGNAN(Q,4,X)
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#define FP_NEG_Q(R,X) _FP_NEG(Q,4,R,X)
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#define FP_ADD_Q(R,X,Y) _FP_ADD(Q,4,R,X,Y)
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#define FP_SUB_Q(R,X,Y) _FP_SUB(Q,4,R,X,Y)
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#define FP_MUL_Q(R,X,Y) _FP_MUL(Q,4,R,X,Y)
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#define FP_DIV_Q(R,X,Y) _FP_DIV(Q,4,R,X,Y)
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#define FP_SQRT_Q(R,X) _FP_SQRT(Q,4,R,X)
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#define _FP_SQRT_MEAT_Q(R,S,T,X,Q) _FP_SQRT_MEAT_4(R,S,T,X,Q)
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#define FP_CMP_Q(r,X,Y,un) _FP_CMP(Q,4,r,X,Y,un)
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#define FP_CMP_EQ_Q(r,X,Y) _FP_CMP_EQ(Q,4,r,X,Y)
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#define FP_TO_INT_Q(r,X,rsz,rsg) _FP_TO_INT(Q,4,r,X,rsz,rsg)
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#define FP_TO_INT_ROUND_Q(r,X,rsz,rsg) _FP_TO_INT_ROUND(Q,4,r,X,rsz,rsg)
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#define FP_FROM_INT_Q(X,r,rs,rt) _FP_FROM_INT(Q,4,X,r,rs,rt)
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#define _FP_FRAC_HIGH_Q(X) _FP_FRAC_HIGH_4(X)
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#define _FP_FRAC_HIGH_RAW_Q(X) _FP_FRAC_HIGH_4(X)
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#else /* not _FP_W_TYPE_SIZE < 64 */
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union _FP_UNION_Q
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{
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long double flt /* __attribute__((mode(TF))) */ ;
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struct {
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned sign : 1;
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unsigned exp : _FP_EXPBITS_Q;
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unsigned long frac1 : _FP_FRACBITS_Q-(_FP_IMPLBIT_Q != 0)-_FP_W_TYPE_SIZE;
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unsigned long frac0 : _FP_W_TYPE_SIZE;
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#else
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unsigned long frac0 : _FP_W_TYPE_SIZE;
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unsigned long frac1 : _FP_FRACBITS_Q-(_FP_IMPLBIT_Q != 0)-_FP_W_TYPE_SIZE;
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unsigned exp : _FP_EXPBITS_Q;
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unsigned sign : 1;
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#endif
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} bits;
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};
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#define FP_DECL_Q(X) _FP_DECL(2,X)
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#define FP_UNPACK_RAW_Q(X,val) _FP_UNPACK_RAW_2(Q,X,val)
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#define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_2_P(Q,X,val)
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#define FP_PACK_RAW_Q(val,X) _FP_PACK_RAW_2(Q,val,X)
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#define FP_PACK_RAW_QP(val,X) \
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do { \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_2_P(Q,val,X); \
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} while (0)
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#define FP_UNPACK_Q(X,val) \
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do { \
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_FP_UNPACK_RAW_2(Q,X,val); \
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_FP_UNPACK_CANONICAL(Q,2,X); \
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} while (0)
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#define FP_UNPACK_QP(X,val) \
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do { \
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_FP_UNPACK_RAW_2_P(Q,X,val); \
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_FP_UNPACK_CANONICAL(Q,2,X); \
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} while (0)
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#define FP_PACK_Q(val,X) \
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do { \
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_FP_PACK_CANONICAL(Q,2,X); \
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_FP_PACK_RAW_2(Q,val,X); \
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} while (0)
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#define FP_PACK_QP(val,X) \
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do { \
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_FP_PACK_CANONICAL(Q,2,X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_2_P(Q,val,X); \
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} while (0)
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#define FP_ISSIGNAN_Q(X) _FP_ISSIGNAN(Q,2,X)
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#define FP_NEG_Q(R,X) _FP_NEG(Q,2,R,X)
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#define FP_ADD_Q(R,X,Y) _FP_ADD(Q,2,R,X,Y)
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#define FP_SUB_Q(R,X,Y) _FP_SUB(Q,2,R,X,Y)
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#define FP_MUL_Q(R,X,Y) _FP_MUL(Q,2,R,X,Y)
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#define FP_DIV_Q(R,X,Y) _FP_DIV(Q,2,R,X,Y)
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#define FP_SQRT_Q(R,X) _FP_SQRT(Q,2,R,X)
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#define _FP_SQRT_MEAT_Q(R,S,T,X,Q) _FP_SQRT_MEAT_2(R,S,T,X,Q)
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#define FP_CMP_Q(r,X,Y,un) _FP_CMP(Q,2,r,X,Y,un)
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#define FP_CMP_EQ_Q(r,X,Y) _FP_CMP_EQ(Q,2,r,X,Y)
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#define FP_TO_INT_Q(r,X,rsz,rsg) _FP_TO_INT(Q,2,r,X,rsz,rsg)
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#define FP_TO_INT_ROUND_Q(r,X,rsz,rsg) _FP_TO_INT_ROUND(Q,2,r,X,rsz,rsg)
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#define FP_FROM_INT_Q(X,r,rs,rt) _FP_FROM_INT(Q,2,X,r,rs,rt)
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#define _FP_FRAC_HIGH_Q(X) _FP_FRAC_HIGH_2(X)
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#define _FP_FRAC_HIGH_RAW_Q(X) _FP_FRAC_HIGH_2(X)
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#endif /* not _FP_W_TYPE_SIZE < 64 */
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#endif /* __MATH_EMU_QUAD_H__ */
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