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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.
331 lines
9.9 KiB
C
331 lines
9.9 KiB
C
/* Software floating-point emulation.
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Definitions for IEEE Quad 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_QUAD_H
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#define SOFT_FP_QUAD_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_Q (4*_FP_W_TYPE_SIZE)
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# define _FP_FRACTBITS_DW_Q (8*_FP_W_TYPE_SIZE)
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#else
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# define _FP_FRACTBITS_Q (2*_FP_W_TYPE_SIZE)
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# define _FP_FRACTBITS_DW_Q (4*_FP_W_TYPE_SIZE)
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#endif
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#define _FP_FRACBITS_Q 113
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#define _FP_FRACXBITS_Q (_FP_FRACTBITS_Q - _FP_FRACBITS_Q)
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#define _FP_WFRACBITS_Q (_FP_WORKBITS + _FP_FRACBITS_Q)
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#define _FP_WFRACXBITS_Q (_FP_FRACTBITS_Q - _FP_WFRACBITS_Q)
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#define _FP_EXPBITS_Q 15
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#define _FP_EXPBIAS_Q 16383
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#define _FP_EXPMAX_Q 32767
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#define _FP_QNANBIT_Q \
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((_FP_W_TYPE) 1 << (_FP_FRACBITS_Q-2) % _FP_W_TYPE_SIZE)
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#define _FP_QNANBIT_SH_Q \
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((_FP_W_TYPE) 1 << (_FP_FRACBITS_Q-2+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
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#define _FP_IMPLBIT_Q \
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((_FP_W_TYPE) 1 << (_FP_FRACBITS_Q-1) % _FP_W_TYPE_SIZE)
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#define _FP_IMPLBIT_SH_Q \
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((_FP_W_TYPE) 1 << (_FP_FRACBITS_Q-1+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
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#define _FP_OVERFLOW_Q \
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((_FP_W_TYPE) 1 << (_FP_WFRACBITS_Q % _FP_W_TYPE_SIZE))
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#define _FP_WFRACBITS_DW_Q (2 * _FP_WFRACBITS_Q)
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#define _FP_WFRACXBITS_DW_Q (_FP_FRACTBITS_DW_Q - _FP_WFRACBITS_DW_Q)
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#define _FP_HIGHBIT_DW_Q \
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((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_Q - 1) % _FP_W_TYPE_SIZE)
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typedef float TFtype __attribute__ ((mode (TF)));
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#if _FP_W_TYPE_SIZE < 64
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union _FP_UNION_Q
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{
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TFtype 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_Q;
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unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
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unsigned long frac2 : _FP_W_TYPE_SIZE;
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unsigned long frac1 : _FP_W_TYPE_SIZE;
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unsigned long frac0 : _FP_W_TYPE_SIZE;
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# else
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unsigned long frac0 : _FP_W_TYPE_SIZE;
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unsigned long frac1 : _FP_W_TYPE_SIZE;
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unsigned long frac2 : _FP_W_TYPE_SIZE;
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unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
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unsigned exp : _FP_EXPBITS_Q;
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unsigned sign : 1;
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# endif /* not bigendian */
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} bits;
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};
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# define FP_DECL_Q(X) _FP_DECL (4, X)
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# define FP_UNPACK_RAW_Q(X, val) _FP_UNPACK_RAW_4 (Q, X, (val))
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# define FP_UNPACK_RAW_QP(X, val) _FP_UNPACK_RAW_4_P (Q, X, (val))
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# define FP_PACK_RAW_Q(val, X) _FP_PACK_RAW_4 (Q, (val), X)
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# define FP_PACK_RAW_QP(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_4_P (Q, (val), X); \
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} \
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while (0)
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# define FP_UNPACK_Q(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_4 (Q, X, (val)); \
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_FP_UNPACK_CANONICAL (Q, 4, X); \
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} \
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while (0)
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# define FP_UNPACK_QP(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_4_P (Q, X, (val)); \
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_FP_UNPACK_CANONICAL (Q, 4, X); \
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} \
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while (0)
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# define FP_UNPACK_SEMIRAW_Q(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_4 (Q, X, (val)); \
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_FP_UNPACK_SEMIRAW (Q, 4, X); \
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} \
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while (0)
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# define FP_UNPACK_SEMIRAW_QP(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_4_P (Q, X, (val)); \
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_FP_UNPACK_SEMIRAW (Q, 4, X); \
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} \
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while (0)
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# define FP_PACK_Q(val, X) \
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do \
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{ \
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_FP_PACK_CANONICAL (Q, 4, X); \
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_FP_PACK_RAW_4 (Q, (val), X); \
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} \
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while (0)
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# define FP_PACK_QP(val, X) \
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do \
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{ \
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_FP_PACK_CANONICAL (Q, 4, X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_4_P (Q, (val), X); \
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} \
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while (0)
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# define FP_PACK_SEMIRAW_Q(val, X) \
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do \
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{ \
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_FP_PACK_SEMIRAW (Q, 4, X); \
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_FP_PACK_RAW_4 (Q, (val), X); \
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} \
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while (0)
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# define FP_PACK_SEMIRAW_QP(val, X) \
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do \
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{ \
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_FP_PACK_SEMIRAW (Q, 4, X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_4_P (Q, (val), X); \
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} \
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while (0)
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# define FP_ISSIGNAN_Q(X) _FP_ISSIGNAN (Q, 4, X)
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# define FP_NEG_Q(R, X) _FP_NEG (Q, 4, R, X)
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# define FP_ADD_Q(R, X, Y) _FP_ADD (Q, 4, R, X, Y)
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# define FP_SUB_Q(R, X, Y) _FP_SUB (Q, 4, R, X, Y)
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# define FP_MUL_Q(R, X, Y) _FP_MUL (Q, 4, R, X, Y)
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# define FP_DIV_Q(R, X, Y) _FP_DIV (Q, 4, R, X, Y)
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# define FP_SQRT_Q(R, X) _FP_SQRT (Q, 4, R, X)
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# define _FP_SQRT_MEAT_Q(R, S, T, X, Q) _FP_SQRT_MEAT_4 (R, S, T, X, (Q))
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# define FP_FMA_Q(R, X, Y, Z) _FP_FMA (Q, 4, 8, R, X, Y, Z)
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# define FP_CMP_Q(r, X, Y, un, ex) _FP_CMP (Q, 4, (r), X, Y, (un), (ex))
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# define FP_CMP_EQ_Q(r, X, Y, ex) _FP_CMP_EQ (Q, 4, (r), X, Y, (ex))
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# define FP_CMP_UNORD_Q(r, X, Y, ex) _FP_CMP_UNORD (Q, 4, (r), X, Y, (ex))
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# define FP_TO_INT_Q(r, X, rsz, rsg) _FP_TO_INT (Q, 4, (r), X, (rsz), (rsg))
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# define FP_TO_INT_ROUND_Q(r, X, rsz, rsg) \
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_FP_TO_INT_ROUND (Q, 4, (r), X, (rsz), (rsg))
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# define FP_FROM_INT_Q(X, r, rs, rt) _FP_FROM_INT (Q, 4, X, (r), (rs), rt)
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# define _FP_FRAC_HIGH_Q(X) _FP_FRAC_HIGH_4 (X)
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# define _FP_FRAC_HIGH_RAW_Q(X) _FP_FRAC_HIGH_4 (X)
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# define _FP_FRAC_HIGH_DW_Q(X) _FP_FRAC_HIGH_8 (X)
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#else /* not _FP_W_TYPE_SIZE < 64 */
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union _FP_UNION_Q
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{
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TFtype flt /* __attribute__ ((mode (TF))) */ ;
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struct _FP_STRUCT_LAYOUT
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{
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_FP_W_TYPE a, b;
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} longs;
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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_Q;
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_FP_W_TYPE frac1 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0) - _FP_W_TYPE_SIZE;
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_FP_W_TYPE frac0 : _FP_W_TYPE_SIZE;
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# else
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_FP_W_TYPE frac0 : _FP_W_TYPE_SIZE;
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_FP_W_TYPE frac1 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0) - _FP_W_TYPE_SIZE;
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unsigned exp : _FP_EXPBITS_Q;
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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_Q(X) _FP_DECL (2, X)
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# define FP_UNPACK_RAW_Q(X, val) _FP_UNPACK_RAW_2 (Q, X, (val))
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# define FP_UNPACK_RAW_QP(X, val) _FP_UNPACK_RAW_2_P (Q, X, (val))
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# define FP_PACK_RAW_Q(val, X) _FP_PACK_RAW_2 (Q, (val), X)
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# define FP_PACK_RAW_QP(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 (Q, (val), X); \
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} \
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while (0)
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# define FP_UNPACK_Q(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_2 (Q, X, (val)); \
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_FP_UNPACK_CANONICAL (Q, 2, X); \
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} \
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while (0)
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# define FP_UNPACK_QP(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_2_P (Q, X, (val)); \
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_FP_UNPACK_CANONICAL (Q, 2, X); \
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} \
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while (0)
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# define FP_UNPACK_SEMIRAW_Q(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_2 (Q, X, (val)); \
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_FP_UNPACK_SEMIRAW (Q, 2, X); \
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} \
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while (0)
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# define FP_UNPACK_SEMIRAW_QP(X, val) \
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do \
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{ \
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_FP_UNPACK_RAW_2_P (Q, X, (val)); \
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_FP_UNPACK_SEMIRAW (Q, 2, X); \
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} \
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while (0)
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# define FP_PACK_Q(val, X) \
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do \
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{ \
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_FP_PACK_CANONICAL (Q, 2, X); \
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_FP_PACK_RAW_2 (Q, (val), X); \
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} \
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while (0)
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# define FP_PACK_QP(val, X) \
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do \
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{ \
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_FP_PACK_CANONICAL (Q, 2, X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_2_P (Q, (val), X); \
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} \
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while (0)
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# define FP_PACK_SEMIRAW_Q(val, X) \
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do \
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{ \
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_FP_PACK_SEMIRAW (Q, 2, X); \
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_FP_PACK_RAW_2 (Q, (val), X); \
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} \
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while (0)
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# define FP_PACK_SEMIRAW_QP(val, X) \
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do \
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{ \
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_FP_PACK_SEMIRAW (Q, 2, X); \
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if (!FP_INHIBIT_RESULTS) \
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_FP_PACK_RAW_2_P (Q, (val), X); \
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} \
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while (0)
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# define FP_ISSIGNAN_Q(X) _FP_ISSIGNAN (Q, 2, X)
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# define FP_NEG_Q(R, X) _FP_NEG (Q, 2, R, X)
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# define FP_ADD_Q(R, X, Y) _FP_ADD (Q, 2, R, X, Y)
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# define FP_SUB_Q(R, X, Y) _FP_SUB (Q, 2, R, X, Y)
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# define FP_MUL_Q(R, X, Y) _FP_MUL (Q, 2, R, X, Y)
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# define FP_DIV_Q(R, X, Y) _FP_DIV (Q, 2, R, X, Y)
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# define FP_SQRT_Q(R, X) _FP_SQRT (Q, 2, R, X)
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# define _FP_SQRT_MEAT_Q(R, S, T, X, Q) _FP_SQRT_MEAT_2 (R, S, T, X, (Q))
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# define FP_FMA_Q(R, X, Y, Z) _FP_FMA (Q, 2, 4, R, X, Y, Z)
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# define FP_CMP_Q(r, X, Y, un, ex) _FP_CMP (Q, 2, (r), X, Y, (un), (ex))
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# define FP_CMP_EQ_Q(r, X, Y, ex) _FP_CMP_EQ (Q, 2, (r), X, Y, (ex))
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# define FP_CMP_UNORD_Q(r, X, Y, ex) _FP_CMP_UNORD (Q, 2, (r), X, Y, (ex))
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# define FP_TO_INT_Q(r, X, rsz, rsg) _FP_TO_INT (Q, 2, (r), X, (rsz), (rsg))
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# define FP_TO_INT_ROUND_Q(r, X, rsz, rsg) \
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_FP_TO_INT_ROUND (Q, 2, (r), X, (rsz), (rsg))
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# define FP_FROM_INT_Q(X, r, rs, rt) _FP_FROM_INT (Q, 2, X, (r), (rs), rt)
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# define _FP_FRAC_HIGH_Q(X) _FP_FRAC_HIGH_2 (X)
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# define _FP_FRAC_HIGH_RAW_Q(X) _FP_FRAC_HIGH_2 (X)
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# define _FP_FRAC_HIGH_DW_Q(X) _FP_FRAC_HIGH_4 (X)
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#endif /* not _FP_W_TYPE_SIZE < 64 */
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#endif /* !SOFT_FP_QUAD_H */
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