151 lines
4.9 KiB
C
151 lines
4.9 KiB
C
/* Software floating-point emulation.
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Definitions for IEEE Single Precision.
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Copyright (C) 1997,1998,1999,2006,2012 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file into
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combinations with other programs, and to distribute those
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combinations without any restriction coming from the use of this
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file. (The Lesser General Public License restrictions do apply in
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other respects; for example, they cover modification of the file,
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and distribution when not linked into a combine executable.)
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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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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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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#define _FP_FRACTBITS_S _FP_W_TYPE_SIZE
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#define _FP_FRACBITS_S 24
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#define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S)
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#define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S)
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#define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S)
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#define _FP_EXPBITS_S 8
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#define _FP_EXPBIAS_S 127
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#define _FP_EXPMAX_S 255
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#define _FP_QNANBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2))
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#define _FP_QNANBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2+_FP_WORKBITS))
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#define _FP_IMPLBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1))
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#define _FP_IMPLBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1+_FP_WORKBITS))
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#define _FP_OVERFLOW_S ((_FP_W_TYPE)1 << (_FP_WFRACBITS_S))
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/* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be
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chosen by the target machine. */
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typedef float SFtype __attribute__((mode(SF)));
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union _FP_UNION_S
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{
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SFtype flt;
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struct _FP_STRUCT_LAYOUT {
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned sign : 1;
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unsigned exp : _FP_EXPBITS_S;
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unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
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#else
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unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
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unsigned exp : _FP_EXPBITS_S;
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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_S(X) _FP_DECL(1,X)
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#define FP_UNPACK_RAW_S(X,val) _FP_UNPACK_RAW_1(S,X,val)
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#define FP_UNPACK_RAW_SP(X,val) _FP_UNPACK_RAW_1_P(S,X,val)
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#define FP_PACK_RAW_S(val,X) _FP_PACK_RAW_1(S,val,X)
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#define FP_PACK_RAW_SP(val,X) \
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do { \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_1_P(S,val,X); \
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} while (0)
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#define FP_UNPACK_S(X,val) \
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do { \
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_FP_UNPACK_RAW_1(S,X,val); \
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_FP_UNPACK_CANONICAL(S,1,X); \
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} while (0)
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#define FP_UNPACK_SP(X,val) \
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do { \
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_FP_UNPACK_RAW_1_P(S,X,val); \
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_FP_UNPACK_CANONICAL(S,1,X); \
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} while (0)
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#define FP_UNPACK_SEMIRAW_S(X,val) \
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do { \
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_FP_UNPACK_RAW_1(S,X,val); \
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_FP_UNPACK_SEMIRAW(S,1,X); \
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} while (0)
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#define FP_UNPACK_SEMIRAW_SP(X,val) \
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do { \
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_FP_UNPACK_RAW_1_P(S,X,val); \
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_FP_UNPACK_SEMIRAW(S,1,X); \
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} while (0)
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#define FP_PACK_S(val,X) \
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do { \
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_FP_PACK_CANONICAL(S,1,X); \
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_FP_PACK_RAW_1(S,val,X); \
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} while (0)
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#define FP_PACK_SP(val,X) \
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do { \
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_FP_PACK_CANONICAL(S,1,X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_1_P(S,val,X); \
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} while (0)
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#define FP_PACK_SEMIRAW_S(val,X) \
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do { \
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_FP_PACK_SEMIRAW(S,1,X); \
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_FP_PACK_RAW_1(S,val,X); \
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} while (0)
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#define FP_PACK_SEMIRAW_SP(val,X) \
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do { \
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_FP_PACK_SEMIRAW(S,1,X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_1_P(S,val,X); \
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} while (0)
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#define FP_ISSIGNAN_S(X) _FP_ISSIGNAN(S,1,X)
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#define FP_NEG_S(R,X) _FP_NEG(S,1,R,X)
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#define FP_ADD_S(R,X,Y) _FP_ADD(S,1,R,X,Y)
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#define FP_SUB_S(R,X,Y) _FP_SUB(S,1,R,X,Y)
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#define FP_MUL_S(R,X,Y) _FP_MUL(S,1,R,X,Y)
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#define FP_DIV_S(R,X,Y) _FP_DIV(S,1,R,X,Y)
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#define FP_SQRT_S(R,X) _FP_SQRT(S,1,R,X)
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#define _FP_SQRT_MEAT_S(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q)
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#define FP_CMP_S(r,X,Y,un) _FP_CMP(S,1,r,X,Y,un)
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#define FP_CMP_EQ_S(r,X,Y) _FP_CMP_EQ(S,1,r,X,Y)
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#define FP_CMP_UNORD_S(r,X,Y) _FP_CMP_UNORD(S,1,r,X,Y)
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#define FP_TO_INT_S(r,X,rsz,rsg) _FP_TO_INT(S,1,r,X,rsz,rsg)
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#define FP_FROM_INT_S(X,r,rs,rt) _FP_FROM_INT(S,1,X,r,rs,rt)
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#define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1(X)
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#define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1(X)
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