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049375e2b5
Building for soft-float ColdFire produces an error in soft-fp:
In file included from ../sysdeps/ieee754/soft-fp/s_fmaf.c:42:
../soft-fp/single.h:85:3: error: 'packed' attribute ignored for field of type 'struct <anonymous>' [-Werror=attributes]
} bits __attribute__ ((packed));
^
While this error only appears in that particular case, this attribute
is in fact never useful, on any architecture. If you have
struct __attribute__ ((packed)) { ... } bits;
or
struct { ... } __attribute__ ((packed)) bits;
then the attribute affects the layout of the structure type. But with
the form used in this code
struct { ... } bits __attribute__ ((packed));
the field bits is being declared packed, but the layout of its type
has already been determined at that point. If on any platform the
layout of the sequence of bit-fields were wrong without the use of a
packed attribute, the attribute would need to be used via a definition
of _FP_STRUCT_LAYOUT, not in its present position.
So this patch removes the useless attribute to fix the build for
ColdFire soft-float. Tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by the patch.
* soft-fp/double.h (union _FP_UNION_D): Do not use attribute
packed on bits.
* soft-fp/extended.h (union _FP_UNION_E): Likewise.
* soft-fp/half.h (union _FP_UNION_H): Likewise.
* soft-fp/quad.h (union _FP_UNION_Q): Likewise.
* soft-fp/single.h (union _FP_UNION_S): Likewise.
324 lines
9.5 KiB
C
324 lines
9.5 KiB
C
/* Software floating-point emulation.
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Definitions for IEEE Double Precision
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Copyright (C) 1997-2018 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_DOUBLE_H
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#define SOFT_FP_DOUBLE_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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#if _FP_W_TYPE_SIZE < 64
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# define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE)
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# define _FP_FRACTBITS_DW_D (4 * _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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# define _FP_FRACTBITS_DW_D (2 * _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_QNANBIT_SH_D \
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((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-2+_FP_WORKBITS) % _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_IMPLBIT_SH_D \
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((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-1+_FP_WORKBITS) % _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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#define _FP_WFRACBITS_DW_D (2 * _FP_WFRACBITS_D)
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#define _FP_WFRACXBITS_DW_D (_FP_FRACTBITS_DW_D - _FP_WFRACBITS_DW_D)
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#define _FP_HIGHBIT_DW_D \
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((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_D - 1) % _FP_W_TYPE_SIZE)
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typedef float DFtype __attribute__ ((mode (DF)));
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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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DFtype 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_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;
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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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{ \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_2_P (D, (val), X); \
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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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while (0)
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# define FP_UNPACK_SEMIRAW_D(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_2 (D, X, (val)); \
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_FP_UNPACK_SEMIRAW (D, 2, X); \
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} \
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while (0)
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# define FP_UNPACK_SEMIRAW_DP(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_2_P (D, X, (val)); \
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_FP_UNPACK_SEMIRAW (D, 2, X); \
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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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while (0)
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# define FP_PACK_SEMIRAW_D(val, X) \
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do \
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{ \
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_FP_PACK_SEMIRAW (D, 2, X); \
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_FP_PACK_RAW_2 (D, (val), X); \
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} \
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while (0)
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# define FP_PACK_SEMIRAW_DP(val, X) \
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do \
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{ \
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_FP_PACK_SEMIRAW (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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} \
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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_FMA_D(R, X, Y, Z) _FP_FMA (D, 2, 4, R, X, Y, Z)
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# define FP_CMP_D(r, X, Y, un, ex) _FP_CMP (D, 2, (r), X, Y, (un), (ex))
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# define FP_CMP_EQ_D(r, X, Y, ex) _FP_CMP_EQ (D, 2, (r), X, Y, (ex))
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# define FP_CMP_UNORD_D(r, X, Y, ex) _FP_CMP_UNORD (D, 2, (r), X, Y, (ex))
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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) \
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_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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# define _FP_FRAC_HIGH_DW_D(X) _FP_FRAC_HIGH_4 (X)
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#else
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union _FP_UNION_D
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{
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DFtype 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_D;
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_FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
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# else
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_FP_W_TYPE 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;
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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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{ \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_1_P (D, (val), X); \
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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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while (0)
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# define FP_UNPACK_SEMIRAW_D(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_1 (D, X, (val)); \
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_FP_UNPACK_SEMIRAW (D, 1, X); \
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} \
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while (0)
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# define FP_UNPACK_SEMIRAW_DP(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_1_P (D, X, (val)); \
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_FP_UNPACK_SEMIRAW (D, 1, X); \
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} \
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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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{ \
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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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} \
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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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{ \
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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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} \
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while (0)
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# define FP_PACK_SEMIRAW_D(val, X) \
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do \
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{ \
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_FP_PACK_SEMIRAW (D, 1, X); \
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_FP_PACK_RAW_1 (D, (val), X); \
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} \
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while (0)
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# define FP_PACK_SEMIRAW_DP(val, X) \
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do \
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{ \
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_FP_PACK_SEMIRAW (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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} \
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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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# define FP_FMA_D(R, X, Y, Z) _FP_FMA (D, 1, 2, R, X, Y, Z)
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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, ex) _FP_CMP (D, 1, (r), X, Y, (un), (ex))
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# define FP_CMP_EQ_D(r, X, Y, ex) _FP_CMP_EQ (D, 1, (r), X, Y, (ex))
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# define FP_CMP_UNORD_D(r, X, Y, ex) _FP_CMP_UNORD (D, 1, (r), X, Y, (ex))
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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) \
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_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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# define _FP_FRAC_HIGH_DW_D(X) _FP_FRAC_HIGH_2 (X)
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#endif /* W_TYPE_SIZE < 64 */
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#endif /* !SOFT_FP_DOUBLE_H */
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