From 9ca6b8e19edefea5003d514b35d133f796add639 Mon Sep 17 00:00:00 2001
From: burnus <burnus@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 17 Jan 2011 19:03:28 +0000
Subject: [PATCH] 2011-01-17  Tobias Burnus  <burnus@net-b.de>

        PR fortran/47295
        * libquadmath.text: Document typedef and constants.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@168930 138bc75d-0d04-0410-961f-82ee72b054a4
---
 libquadmath/ChangeLog        |  5 +++++
 libquadmath/libquadmath.texi | 47 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/libquadmath/ChangeLog b/libquadmath/ChangeLog
index f5308db895c..b6929df0258 100644
--- a/libquadmath/ChangeLog
+++ b/libquadmath/ChangeLog
@@ -1,5 +1,10 @@
 2011-01-17  Tobias Burnus  <burnus@net-b.de>
 
+	PR fortran/47295
+	* libquadmath.text: Document typedef and constants.
+
+2011-01-17  Tobias Burnus  <burnus@net-b.de>
+
 	PR fortran/46817
 	* quadmath-imp.h: Refer to libquadmath not ot libiberty,
 	bump copyright year and use /**/ instead of // comments.
diff --git a/libquadmath/libquadmath.texi b/libquadmath/libquadmath.texi
index 3dbbe5d6380..bcd205939d9 100644
--- a/libquadmath/libquadmath.texi
+++ b/libquadmath/libquadmath.texi
@@ -72,6 +72,7 @@ Math Library Application Programming Interface (API).
 @comment  better formatting.
 @comment
 @menu
+* Typedef and constants::      Defined data types and constants
 * Math Library Routines::      The Libquadmath math runtime application
                                programming interface.
 * I/O Library Routines::       The Libquadmath I/O runtime application
@@ -84,6 +85,52 @@ Math Library Application Programming Interface (API).
 
 
 @c ---------------------------------------------------------------------
+@c Defined macros
+@c ---------------------------------------------------------------------
+
+@node Typedef and constants
+@chapter Typedef and constants
+
+The following data type has been defined via @code{typedef}.
+
+@table @asis
+@item @code{__complex128}: @code{__float128}-based complex number
+@end table
+
+The following macros are defined, which give the numeric limits of the
+@code{__float128} data type.
+
+@table @asis
+@item @code{FLT128_MAX}: largest finite number
+@item @code{FLT128_MIN}: smallest positive number with full precision
+@item @code{FLT128_EPSILON}: difference between 1 and the next larger
+                             representable number
+@item @code{FLT128_DENORM_MIN}: smallest positive denormalized number
+@item @code{FLT128_MANT_DIG}: number of digits in the mantissa (bit precision)
+@item @code{FLT128_MIN_EXP}: maximal negative exponent
+@item @code{FLT128_MAX_EXP}: maximal positive exponent
+@end table
+
+The following mathematical constants of type @code{__float128} are defined.
+
+@table @asis
+@item @code{M_Eq}: the constant e (Euler's number)
+@item @code{M_LOG2Eq}: binary logarithm of 2
+@item @code{M_LOG10Eq}: common, decimal logarithm of 2
+@item @code{M_LN2q}: natural logarithm of 2
+@item @code{M_LN10q}: natural logarithm of 10
+@item @code{M_PIq}: pi
+@item @code{M_PI_2q}: two pi
+@item @code{M_PI_4q}: four pi
+@item @code{M_1_PIq}: one over pi
+@item @code{M_2_PIq}: one over two pi
+@item @code{M_2_SQRTPIq}: two over square root of pi
+@item @code{M_SQRT2q}: square root of 2
+@item @code{M_SQRT1_2q}: one over square root of 2
+@end table
+
+
+@c ---------------------------------------------------------------------
 @c Math routines
 @c ---------------------------------------------------------------------
 
-- 
2.11.4.GIT