1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
205 lines
6.2 KiB
C
205 lines
6.2 KiB
C
/* Software floating-point emulation.
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Definitions for IEEE Double 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_DOUBLE_H__
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#define __MATH_EMU_DOUBLE_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_D (2 * _FP_W_TYPE_SIZE)
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#else
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#define _FP_FRACTBITS_D _FP_W_TYPE_SIZE
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#endif
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#define _FP_FRACBITS_D 53
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#define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D)
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#define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D)
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#define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D)
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#define _FP_EXPBITS_D 11
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#define _FP_EXPBIAS_D 1023
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#define _FP_EXPMAX_D 2047
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#define _FP_QNANBIT_D \
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((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE)
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#define _FP_IMPLBIT_D \
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((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)
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#define _FP_OVERFLOW_D \
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((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)
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#if _FP_W_TYPE_SIZE < 64
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union _FP_UNION_D
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{
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double flt;
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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_D;
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unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
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unsigned frac0 : _FP_W_TYPE_SIZE;
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#else
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unsigned frac0 : _FP_W_TYPE_SIZE;
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unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
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unsigned exp : _FP_EXPBITS_D;
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unsigned sign : 1;
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#endif
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} bits __attribute__((packed));
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};
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#define FP_DECL_D(X) _FP_DECL(2,X)
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#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_2(D,X,val)
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#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_2_P(D,X,val)
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#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_2(D,val,X)
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#define FP_PACK_RAW_DP(val,X) \
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do { \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_2_P(D,val,X); \
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} while (0)
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#define FP_UNPACK_D(X,val) \
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do { \
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_FP_UNPACK_RAW_2(D,X,val); \
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_FP_UNPACK_CANONICAL(D,2,X); \
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} while (0)
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#define FP_UNPACK_DP(X,val) \
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do { \
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_FP_UNPACK_RAW_2_P(D,X,val); \
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_FP_UNPACK_CANONICAL(D,2,X); \
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} while (0)
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#define FP_PACK_D(val,X) \
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do { \
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_FP_PACK_CANONICAL(D,2,X); \
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_FP_PACK_RAW_2(D,val,X); \
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} while (0)
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#define FP_PACK_DP(val,X) \
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do { \
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_FP_PACK_CANONICAL(D,2,X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_2_P(D,val,X); \
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} while (0)
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#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,2,X)
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#define FP_NEG_D(R,X) _FP_NEG(D,2,R,X)
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#define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y)
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#define FP_SUB_D(R,X,Y) _FP_SUB(D,2,R,X,Y)
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#define FP_MUL_D(R,X,Y) _FP_MUL(D,2,R,X,Y)
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#define FP_DIV_D(R,X,Y) _FP_DIV(D,2,R,X,Y)
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#define FP_SQRT_D(R,X) _FP_SQRT(D,2,R,X)
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#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_2(R,S,T,X,Q)
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#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,2,r,X,Y,un)
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#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,2,r,X,Y)
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#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,2,r,X,rsz,rsg)
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#define FP_TO_INT_ROUND_D(r,X,rsz,rsg) _FP_TO_INT_ROUND(D,2,r,X,rsz,rsg)
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#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,2,X,r,rs,rt)
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#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_2(X)
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#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_2(X)
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#else
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union _FP_UNION_D
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{
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double flt;
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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_D;
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unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
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#else
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unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
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unsigned exp : _FP_EXPBITS_D;
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unsigned sign : 1;
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#endif
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} bits __attribute__((packed));
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};
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#define FP_DECL_D(X) _FP_DECL(1,X)
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#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_1(D,X,val)
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#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_1_P(D,X,val)
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#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_1(D,val,X)
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#define FP_PACK_RAW_DP(val,X) \
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do { \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_1_P(D,val,X); \
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} while (0)
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#define FP_UNPACK_D(X,val) \
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do { \
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_FP_UNPACK_RAW_1(D,X,val); \
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_FP_UNPACK_CANONICAL(D,1,X); \
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} while (0)
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#define FP_UNPACK_DP(X,val) \
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do { \
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_FP_UNPACK_RAW_1_P(D,X,val); \
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_FP_UNPACK_CANONICAL(D,1,X); \
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} while (0)
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#define FP_PACK_D(val,X) \
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do { \
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_FP_PACK_CANONICAL(D,1,X); \
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_FP_PACK_RAW_1(D,val,X); \
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} while (0)
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#define FP_PACK_DP(val,X) \
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do { \
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_FP_PACK_CANONICAL(D,1,X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_1_P(D,val,X); \
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} while (0)
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#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,1,X)
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#define FP_NEG_D(R,X) _FP_NEG(D,1,R,X)
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#define FP_ADD_D(R,X,Y) _FP_ADD(D,1,R,X,Y)
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#define FP_SUB_D(R,X,Y) _FP_SUB(D,1,R,X,Y)
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#define FP_MUL_D(R,X,Y) _FP_MUL(D,1,R,X,Y)
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#define FP_DIV_D(R,X,Y) _FP_DIV(D,1,R,X,Y)
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#define FP_SQRT_D(R,X) _FP_SQRT(D,1,R,X)
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#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q)
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/* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
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the target machine. */
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#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,1,r,X,Y,un)
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#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,1,r,X,Y)
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#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,1,r,X,rsz,rsg)
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#define FP_TO_INT_ROUND_D(r,X,rsz,rsg) _FP_TO_INT_ROUND(D,1,r,X,rsz,rsg)
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#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,1,X,r,rs,rt)
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#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_1(X)
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#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_1(X)
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#endif /* W_TYPE_SIZE < 64 */
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#endif /* __MATH_EMU_DOUBLE_H__ */
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