2009-03-25 Craig Howland <howland@LGSInnovations.com>

	* libc/include/math.h:  (llround, llroundf): Declare.
	* libm/common/s_llround.c: New file, implementing llround().
	* libm/common/sf_llround.c: New file, implementing llroundf().
	* libm/common/sf_lround.c: Remove spurious cast in _DOUBLE_IS_32BITS
	version of function.
	* libm/common/sf_lrint.c: Ditto.
	* libm/common/sf_logb.c:  Corrected return for subnormal argument
	by replacing existing function with a version created from sf_ilogb.c.
	* libm/common/s_logb.c: Ditto, except starting point s_ilogb.c.  Also
	added documentation for logb() and logbf().
	* libm/common/s_signbit.c:  Add signbit() documentation.
	* libm/common/s_log2.c: Update return values to match what w_log2.c has,
	since log2 uses log(); add note about being derived instead of direct.
	* libm/common/sf_fma.c: Add casts to attempt to get correct results,
	as well as comments pointing out problems with the implementation.
	* libm/common/s_fma.c: Add fma() and fmaf() documentation.
	* libm/common/sf_remquo.c: Incorrect quotient returns for large values
	corrected by discarding existing function and replacing with Sun
	verion, with some enhancements.
	* libm/common/s_remquo.c: Ditto.  Add remquo() and remquof()
	documentation.
	* libm/common/s_fmax.c: Add fmax() and fmaxf() documentation.
	* libm/common/s_fmin.c: Add fmin() and fminf() documentation.
	* libm/common/s_fdim.c: Return NAN for NAN arg, add fdim() and fdimf()
	documentation.
	* libm/common/sf_fdim.c: Return NAN for NAN arg, HUGE_VALF for inf arg.
	* libm/common/s_trunc.c: Add trunc() and truncf() documentation.
	* libm/common/s_rint.c: Add rint() and rintf() documentation.
	* libm/common/s_round.c: Add round() and roundf() documentation.
	* libm/common/s_scalbn.c: Add scalbln() and scalblnf() documentation.
	* libm/common/s_infinity.c: Add infinity() and infinityf()
	documentation.
	* libm/common/s_lround.c: Add lround(), lroundf(), llround(), and
	llroundf() documentation.
	* libm/common/s_lrint.c: Add lrint(), lrintf(), llrint(), and llrintf()
	documentation.
	* libm/common/isgreater.c: New file for documenting math.h function-like
	macros isgreater(), isgreaterequal(), isless(), islessequal(),
	islessgreater(), and isunordered().
	* libm/common/s_isnan.c: Add documentation for function-like macros
	fpclassify(), isfinite(), isinf(), isnan(), and isnormal().
	* libm/common/s_nearbyint.c: Add nearbyint() and nearbyintf()
	documentation.
	* libm/common/Makefile.am: Add s_llround.c (src); sf_llround.c (fsrc);
	s_fdim.def, s_fma.def, s_fmax.def, s_fmin.def,
	s_logb.def, s_lrint.def, s_lround.def, s_nearbyint.def, s_remquo.def,
        s_rint.def, s_round.def, s_signbit.def, s_trunc.def, and
        isgreater.def (chobj);
	re-name all existing chew files (chobj) to match source file base
	names (put in underscores), delete all special targets for chew files
	(leaving all to be generated by rule).
	* libm/common/Makefile.in: regenerate.
	* libm/math/w_exp2.c: Add "base 2" to documentation description (and
	delete TRAD_SYNOPSIS).
	* libm/math/w_gamma.c: Add tgamma() and tgammaf() documentation, along
	with some history behind the function names.
	* libm/math/math.tex: Add includes for newly-added documentation (see
	.def additions to common/Makefile.am and math/Makefile.am in this
	ChangeLog list), adjusted existing .def file names to match source file
	base names (added underscores); add mention of HUGE_VALF; rename
	"Version of library" section to "Error Handling" and add some text
	about floating-point exception; added section "Standards Compliance And
	Portability".
	* libm/math/Makefile.am: Add w_exp2.def (chobj);
	re-name all existing chew files (chobj) to match source file base
	names, delete all special targets for chew files (leaving all to be
	generated by rule).
	* libm/math/Makefile.in: regenerated
	* doc/makedoc.c: Change silent ignoring of commands < 5 characters
	to a failure when reading macro file for commands < 4 characters;
	add -v (verbose) option for printing some debugging information;
	get rid of spurious translation of "@*" to "*" (no source files used @*,
	so no existing doc pages were affected); clean up some compiler
	warnings.
	* doc/doc.str: add BUGS and SEEALSO sections (to match texi2pod.pl
	which has them); Remove ITEM command (redundant with makedoc built-in
	"o", not used in any present source file so nothing is lost, anyway).
	* HOWTO: New file to hold information for maintainers regarding how
	to do things.  Initial sections on documentation and ELIX levels.

1 files changed, 75 insertions, 0 deletions

diff --git a/newlib/libm/common/isgreater.c b/newlib/libm/common/isgreater.c
new file mode 100644
index 0000000..bd4e95e
--- /dev/null
+++ b/newlib/libm/common/isgreater.c
@@ -0,0 +1,75 @@
+/* isgreater.c:  This file contains no source code, but rather only the
+ * man-page comments.  All of the documented "functions" are actually macros
+ * defined in math.h (q.v.).  */
+/*
+FUNCTION
+<<isgreater>>, <<isgreaterequal>>, <<isless>>, <<islessequal>>, <<islessgreater>>, and <<isunordered>>--comparison macros
+INDEX
+	isgreater
+INDEX
+	isgreaterequal
+INDEX
+	isless
+INDEX
+	islessequal
+INDEX
+	islessgreater
+INDEX
+	isunordered
+
+ANSI_SYNOPSIS
+	#include <math.h>
+	int isgreater(real-floating <[x]>, real-floating <[y]>);
+	int isgreaterequal(real-floating <[x]>, real-floating <[y]>);
+	int isless(real-floating <[x]>, real-floating <[y]>);
+	int islessequal(real-floating <[x]>, real-floating <[y]>);
+	int islessgreater(real-floating <[x]>, real-floating <[y]>);
+	int isunordered(real-floating <[x]>, real-floating <[y]>);
+
+DESCRIPTION
+<<isgreater>>, <<isgreaterequal>>, <<isless>>, <<islessequal>>,
+<<islessgreater>>, and <<isunordered>> are macros defined for use in
+comparing floating-point numbers without raising any floating-point
+exceptions.
+
+The relational operators (i.e. <, >, <=, and >=) support the usual mathematical
+relationships between numeric values.  For any ordered pair of numeric
+values exactly one of the relationships--less, greater, and equal--is
+true.  Relational operators may raise the "invalid" floating-point
+exception when argument values are NaNs.  For a NaN and a numeric value, or
+for two NaNs, just the unordered relationship is true (i.e., if one or both
+of the arguments a NaN, the relationship is called unordered).  The specified
+macros are quiet (non floating-point exception raising) versions of the
+relational operators, and other comparison macros that facilitate writing
+efficient code that accounts for NaNs without suffering the "invalid"
+floating-point exception.  In the synopses shown, "real-floating" indicates
+that the argument is an expression of real floating type.
+
+Please note that saying that the macros do not raise floating-point
+exceptions, it is referring to the function that they are performing.  It
+is certainly possible to give them an expression which causes an exception.
+For example:
+o+
+o	NaN < 1.0
+		causes an "invalid" exception,
+o	isless(NaN, 1.0)
+		does not, and
+o	isless(NaN*0., 1.0)
+		causes an exception due to the "NaN*0.", but not from the
+resultant reduced comparison of isless(NaN, 1.0).
+o-
+
+RETURNS
+@comment Formatting note:  "$@" forces a new line
+No floating-point exceptions are raised for any of the macros.@*
+The <<isgreater>> macro returns the value of (x) > (y).@*
+The <<isgreaterequal>> macro returns the value of (x) >= (y).@*
+The <<isless>> macro returns the value of (x) < (y).@*
+The <<islessequal>> macro returns the value of (x) <= (y).@*
+The <<islessgreater>> macro returns the value of (x) < (y) || (x) > (y).@*
+The <<isunordered>> macro returns 1 if either of its arguments is NaN and 0 otherwise.
+
+PORTABILITY
+C99, POSIX.
+
+*/