From 6bdac416e9e1aecfb94cd3ae383889cc7b7e62e3 Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Wed, 6 Dec 2000 23:50:11 +0000
Subject: 2000-12-06  Jeff Johnston  <jjohnstn@redhat.com>

        * libc/stdlib/Makefile.am: Added ldtoa.c to list of sources.
        * libc/stdlib/Makefile.in: Regenerated.
        * libc/stdio/floatio.h: Added suitable MAXEXP for long double.
        * libc/stdio/vfieeefp.h: Added long double bit structures.
        * libc/stdio/vfprintf.c[WANT_IO_LONG_DBL]: Added long double support.
        [WANT_IO_LONG_DBL](isinfl, isnanl): New static long double routines.
        (exponent): Changed expbuf to reasonable maximum instead of MAXEXP.
        * libc/stdio/vfscanf.c[WANT_IO_LONG_DBL]: Added long double support.
        * libc/stdlib/ldtoa.c: New file containing _ldtoa_r and
        _strtold routines used for conversions between character
        and long double.
---
 newlib/libc/stdio/vfieeefp.h | 79 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)

(limited to 'newlib/libc/stdio/vfieeefp.h')

diff --git a/newlib/libc/stdio/vfieeefp.h b/newlib/libc/stdio/vfieeefp.h
index 6843d5f47..de0267223 100644
--- a/newlib/libc/stdio/vfieeefp.h
+++ b/newlib/libc/stdio/vfieeefp.h
@@ -57,6 +57,85 @@
 Exactly one of IEEE_8087, IEEE_MC68k, VAX, or IBM should be defined.
 #endif
 
+#ifdef WANT_IO_LONG_DBL
+/* If we are going to examine or modify specific bits in a long double using
+   the lword0 or lwordx macros, then we must wrap the long double inside
+   a union.  This is necessary to avoid undefined behavior according to
+   the ANSI C spec.  */
+
+#ifdef IEEE_8087
+#if LDBL_MANT_DIG == 24
+struct ldieee
+{
+  unsigned manh:23;
+  unsigned exp:8;
+  unsigned sign:1;
+}
+#elif LDBL_MANT_DIG == 53
+struct ldieee
+{
+  unsigned manl:20;
+  unsigned manh:32;
+  unsigned exp:11;
+  unsigned sign:1;
+}
+#elif LDBL_MANT_DIG == 64
+struct ldieee
+{
+  unsigned manl:32;
+  unsigned manh:32;
+  unsigned exp:15;
+  unsigned sign:1;
+};
+#elif LDBL_MANT_DIG > 64
+struct ldieee
+{
+  unsigned manl3:16;
+  unsigned manl2:32;
+  unsigned manl:32;
+  unsigned manh:32;
+  unsigned exp:15;
+  unsigned sign:1;
+};
+#endif /* LDBL_MANT_DIG */
+#else  /* !IEEE_8087 */
+#if LDBL_MANT_DIG == 24
+struct ldieee
+{
+  unsigned sign:1;
+  unsigned exp:8;
+  unsigned manh:23;
+}
+#elif LDBL_MANT_DIG == 53
+struct ldieee
+{
+  unsigned sign:1;
+  unsigned exp:11;
+  unsigned manh:32;
+  unsigned manl:20;
+}
+#elif LDBL_MANT_DIG == 64
+struct ldieee
+{
+  unsigned sign:1;
+  unsigned exp:15;
+  unsigned manh:32;
+  unsigned manl:32;
+}
+#elif LDBL_MANT_DIG > 64
+struct ldieee
+{
+  unsigned sign:1;
+  unsigned exp:15;
+  unsigned manh:32;
+  unsigned manl:32;
+  unsigned manl2:32;
+  unsigned manl3;16;
+};
+#endif /* LDBL_MANT_DIG */
+#endif /* !IEEE_8087 */
+#endif /* WANT_IO_LONG_DBL */
+
 /* If we are going to examine or modify specific bits in a double using
    the word0 and/or word1 macros, then we must wrap the double inside
    a union.  This is necessary to avoid undefined behavior according to
-- 
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