[Qemu-devel] [RFC 03/12] target-ppc: Modify dconfig.h to Integrate with QEMU

[Tom Musta <tommusta@gmail.com>]

This patch modifies the dconfig.h header file so that libdecnumber code
integrates correctly with QEMU.  Normally, this file is generated from
a configuration script, but it can be replaced with a static file for
this usage within QEMU:

  - the WORDS_BIGENDIAN preprocessor macro is used in libdecnumber code to
    determines endianness.  It is derived from the existing QEMU macro
    HOST_WORDS_BIGENDIAN which is defined in config-host.h.

  - the DECPUN macro determines the number of decimal digits (aka declets) per
    unit (byte).  This is 3 for PowerPC DFP.

Signed-off-by: Tom Musta <tommusta@gmail.com>
---
 include/libdecnumber/dconfig.h |   24 ++++++------------------
 1 files changed, 6 insertions(+), 18 deletions(-)

diff --git a/include/libdecnumber/dconfig.h b/include/libdecnumber/dconfig.h
index 91aa334..d4fed0d 100644
--- a/include/libdecnumber/dconfig.h
+++ b/include/libdecnumber/dconfig.h
@@ -22,26 +22,14 @@ a copy of the GCC Runtime Library Exception along with this program;
 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 <http://www.gnu.org/licenses/>.  */
 
-#ifdef IN_LIBGCC2
+#include "config-host.h"
 
-#include "tconfig.h"
-#include "coretypes.h"
-#include "tm.h"
-
-#ifndef LIBGCC2_WORDS_BIG_ENDIAN
-#define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
-#endif
-
-#ifndef LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
-#define LIBGCC2_FLOAT_WORDS_BIG_ENDIAN LIBGCC2_WORDS_BIG_ENDIAN
-#endif
-
-#if LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
+#if defined(HOST_WORDS_BIGENDIAN)
 #define WORDS_BIGENDIAN 1
-#endif
-
 #else
+#define WORDS_BIGENDIAN 0
+#endif
 
-#include "config.h"
-
+#ifndef DECDPUN
+#define DECDPUN 3
 #endif
-- 
1.7.1