svn commit: r366054 - in head/lib/libc: powerpc/softfloat powerpc64

[Brandon Bergren]

Author: bdragon
Date: Wed Sep 23 02:05:44 2020
New Revision: 366054
URL: https://svnweb.freebsd.org/changeset/base/366054

Log:
  [PowerPC64LE] Fix gdtoa configurations on LE.
  
  gdtoa wins the award for "most outdated endianness naming convention"
  with its IEEE_8087 vs IEEE_MC68k defines. I had a good chuckle.
  
  Update softfloat and arith.h to adjust to BE or LE automatically
  based on the low level preprocessor defines.
  
  Fixes printf/scanf on PowerPC64LE, although there is still a problem
  lurking regarding Signalling NaNs...
  
  Sponsored by:	Tag1 Consulting, Inc.

Modified:
  head/lib/libc/powerpc/softfloat/powerpc-gcc.h
  head/lib/libc/powerpc64/arith.h

Modified: head/lib/libc/powerpc/softfloat/powerpc-gcc.h
==============================================================================
--- head/lib/libc/powerpc/softfloat/powerpc-gcc.h	Wed Sep 23 01:56:26 2020	(r366053)
+++ head/lib/libc/powerpc/softfloat/powerpc-gcc.h	Wed Sep 23 02:05:44 2020	(r366054)
@@ -6,7 +6,11 @@
 One of the macros `BIGENDIAN' or `LITTLEENDIAN' must be defined.
 -------------------------------------------------------------------------------
 */
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define LITTLEENDIAN
+#else
 #define BIGENDIAN
+#endif
 
 /*
 -------------------------------------------------------------------------------

Modified: head/lib/libc/powerpc64/arith.h
==============================================================================
--- head/lib/libc/powerpc64/arith.h	Wed Sep 23 01:56:26 2020	(r366053)
+++ head/lib/libc/powerpc64/arith.h	Wed Sep 23 02:05:44 2020	(r366054)
@@ -11,8 +11,13 @@
  * architecture.  See contrib/gdtoa/gdtoaimp.h for details.
  */
 
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define IEEE_8087
+#define Arith_Kind_ASL 1
+#else
 #define IEEE_MC68k
 #define Arith_Kind_ASL 2
+#endif
 #define Long int
 #define Intcast (int)(long)
 #define Double_Align