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a2f8be9c83
This patch makes soft-fp headers consistently use multiple-include guards, something previously done mainly only in the Linux kernel version. The guard macros aren't the same as those used in the Linux kernel, but there seems to be enough variation in such guards in Linux kernel code that hopefully this version will be acceptable there. Tested for powerpc-nofpu that installed stripped shared libraries are unchanged by this patch. * soft-fp/double.h [SOFT_FP_DOUBLE_H]: New multiple-include guard. * soft-fp/extended.h [SOFT_FP_EXTENDED_H]: Likewise. * soft-fp/op-1.h [SOFT_FP_OP_1_H]: Likewise. * soft-fp/op-2.h [SOFT_FP_OP_2_H]: Likewise. * soft-fp/op-4.h [SOFT_FP_OP_4_H]: Likewise. * soft-fp/op-8.h [SOFT_FP_OP_8_H]: Likewise. * soft-fp/op-common.h [SOFT_FP_OP_COMMON_H]: Likewise. * soft-fp/quad.h [SOFT_FP_QUAD_H]: Likewise. * soft-fp/single.h [SOFT_FP_SINGLE_H]: Likewise. * soft-fp/soft-fp.h (SOFT_FP_H): Define to 1 rather than empty. Add comment on closing #endif.
200 lines
6.2 KiB
C
200 lines
6.2 KiB
C
/* Software floating-point emulation.
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Definitions for IEEE Single Precision.
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Copyright (C) 1997-2015 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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#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 __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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{ \
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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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