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soft-fp: Support using struct layout attributes on bit-fields.
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@ -1,3 +1,12 @@
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2012-03-01 Kai Tietz <ktietz@redhat.com>
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* soft-fp/soft-fp.h (_FP_STRUCT_LAYOUT): New macro.
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* soft-fp/quad.h (_FP_UNION_Q): Use _FP_STRUCT_LAYOUT on struct
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containing bit-fields.
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* soft-fp/extended.h (_FP_UNION_E): Likewise.
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* soft-fp/single.h (_FP_UNION_S): Likewise.
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* soft-fp/double.h (_FP_UNION_D): Likewise.
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2012-02-29 Joseph Myers <joseph@codesourcery.com>
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[BZ #13786]
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@ -1,6 +1,6 @@
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/* Software floating-point emulation.
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Definitions for IEEE Double Precision
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Copyright (C) 1997, 1998, 1999, 2006, 2007, 2008, 2009
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Copyright (C) 1997, 1998, 1999, 2006, 2007, 2008, 2009, 2012
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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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@ -67,7 +67,7 @@ typedef float DFtype __attribute__((mode(DF)));
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union _FP_UNION_D
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{
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DFtype flt;
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struct {
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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_D;
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@ -166,7 +166,7 @@ union _FP_UNION_D
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union _FP_UNION_D
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{
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DFtype flt;
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struct {
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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_D;
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@ -1,6 +1,6 @@
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/* Software floating-point emulation.
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Definitions for IEEE Extended Precision.
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Copyright (C) 1999,2006,2007 Free Software Foundation, Inc.
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Copyright (C) 1999,2006,2007,2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek (jj@ultra.linux.cz).
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@ -63,7 +63,7 @@ typedef float XFtype __attribute__((mode(XF)));
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union _FP_UNION_E
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{
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XFtype flt;
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struct
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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 long pad1 : _FP_W_TYPE_SIZE;
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@ -262,7 +262,7 @@ union _FP_UNION_E
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union _FP_UNION_E
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{
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XFtype flt;
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struct {
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struct _FP_STRUCT_LAYOUT {
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#if __BYTE_ORDER == __BIG_ENDIAN
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_FP_W_TYPE pad : (_FP_W_TYPE_SIZE - 1 - _FP_EXPBITS_E);
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unsigned sign : 1;
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@ -1,6 +1,6 @@
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/* Software floating-point emulation.
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Definitions for IEEE Quad Precision.
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Copyright (C) 1997,1998,1999,2006,2007 Free Software Foundation, Inc.
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Copyright (C) 1997,1998,1999,2006,2007,2012 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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@ -66,7 +66,7 @@ typedef float TFtype __attribute__((mode(TF)));
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union _FP_UNION_Q
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{
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TFtype flt;
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struct
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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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@ -170,10 +170,10 @@ union _FP_UNION_Q
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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 {
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struct _FP_STRUCT_LAYOUT {
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_FP_W_TYPE a, b;
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} longs;
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struct {
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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_Q;
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@ -1,6 +1,6 @@
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/* Software floating-point emulation.
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Definitions for IEEE Single Precision.
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Copyright (C) 1997,1998,1999,2006 Free Software Foundation, Inc.
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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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@ -57,7 +57,7 @@ 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 {
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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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@ -1,5 +1,5 @@
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/* Software floating-point emulation.
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Copyright (C) 1997,1998,1999,2000,2002,2003,2005,2006,2007
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Copyright (C) 1997,1998,1999,2000,2002,2003,2005,2006,2007,2012
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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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@ -84,6 +84,16 @@
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#define FP_EX_DENORM 0
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#endif
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/* _FP_STRUCT_LAYOUT may be defined as an attribute to determine the
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struct layout variant used for structures where bit-fields are used
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to access specific parts of binary floating-point numbers. This is
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required for systems where the default ABI uses struct layout with
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differences in how consecutive bit-fields are laid out from the
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default expected by soft-fp. */
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#ifndef _FP_STRUCT_LAYOUT
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#define _FP_STRUCT_LAYOUT
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#endif
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#ifdef _FP_DECL_EX
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#define FP_DECL_EX \
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int _fex = 0; \
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