soft-fp: Support using struct layout attributes on bit-fields.

[platform/upstream/glibc.git] / soft-fp / soft-fp.h

diff --git a/soft-fp/soft-fp.h b/soft-fp/soft-fp.h
index ed4d39d..46cb1cf 100644 (file)
--- a/soft-fp/soft-fp.h
+++ b/soft-fp/soft-fp.h
@@ -1,5 +1,5 @@
 /* Software floating-point emulation.
-   Copyright (C) 1997,1998,1999,2000,2002,2003,2005,2006,2007
+   Copyright (C) 1997,1998,1999,2000,2002,2003,2005,2006,2007,2012
        Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Richard Henderson (rth@cygnus.com),
@@ -84,6 +84,16 @@
 #define FP_EX_DENORM           0
 #endif
 
+/* _FP_STRUCT_LAYOUT may be defined as an attribute to determine the
+   struct layout variant used for structures where bit-fields are used
+   to access specific parts of binary floating-point numbers.  This is
+   required for systems where the default ABI uses struct layout with
+   differences in how consecutive bit-fields are laid out from the
+   default expected by soft-fp.  */
+#ifndef _FP_STRUCT_LAYOUT
+#define _FP_STRUCT_LAYOUT
+#endif
+
 #ifdef _FP_DECL_EX
 #define FP_DECL_EX                                     \
   int _fex = 0;                                                \