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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
196 lines
6.0 KiB
C
196 lines
6.0 KiB
C
/* Software floating-point emulation.
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Definitions for IEEE Single Precision.
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Copyright (C) 1997-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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<https://www.gnu.org/licenses/>. */
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#ifndef SOFT_FP_SINGLE_H
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#define SOFT_FP_SINGLE_H 1
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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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#if _FP_W_TYPE_SIZE < 64
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# define _FP_FRACTBITS_DW_S (2 * _FP_W_TYPE_SIZE)
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#else
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# define _FP_FRACTBITS_DW_S _FP_W_TYPE_SIZE
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#endif
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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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#define _FP_WFRACBITS_DW_S (2 * _FP_WFRACBITS_S)
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#define _FP_WFRACXBITS_DW_S (_FP_FRACTBITS_DW_S - _FP_WFRACBITS_DW_S)
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#define _FP_HIGHBIT_DW_S \
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((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_S - 1) % _FP_W_TYPE_SIZE)
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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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{
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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;
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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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{ \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_1_P (S, (val), X); \
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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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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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#if _FP_W_TYPE_SIZE < 64
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# define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 2, R, X, Y, Z)
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#else
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# define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 1, R, X, Y, Z)
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#endif
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#define FP_CMP_S(r, X, Y, un, ex) _FP_CMP (S, 1, (r), X, Y, (un), (ex))
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#define FP_CMP_EQ_S(r, X, Y, ex) _FP_CMP_EQ (S, 1, (r), X, Y, (ex))
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#define FP_CMP_UNORD_S(r, X, Y, ex) _FP_CMP_UNORD (S, 1, (r), X, Y, (ex))
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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_TO_INT_ROUND_S(r, X, rsz, rsg) \
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_FP_TO_INT_ROUND (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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#if _FP_W_TYPE_SIZE < 64
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# define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_2 (X)
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#else
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# define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_1 (X)
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#endif
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#endif /* !SOFT_FP_SINGLE_H */
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