From bf5300eaee04b5e143dea58e922bc6ae260197dd Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Mon, 18 Oct 2010 22:40:24 +0000
Subject: 2010-10-18  Marco Atzeri  <marco_atzeri@yahoo.it>

        * libm/Makefile.am: added complex functions documentation
        * libm/libm.texinfo: ditto
        * libm/complex/Makefile.am: Ditto
        * libm/complex/complex.tex: Ditto
        * libm/complex/(cabs.c, cacos.c, cacosh.c, carg.c,
        casin.c, casinh.c, catan.c, catanh.c, ccos.c, ccosh.c,
        cexp.c, cimag.c, clog.c, conj.c, cpow.c, cproj.c, creal.c,
        csin.c, csinh.c, csqrt.c, ctan.c, ctanh.c): Ditto
        * libm/Makefile.in: Regenerate
        * libm/complex/Makefile.in: Ditto
---
 newlib/libm/complex/cproj.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'newlib/libm/complex/cproj.c')

diff --git a/newlib/libm/complex/cproj.c b/newlib/libm/complex/cproj.c
index e46742e9e..42fc0f1e8 100644
--- a/newlib/libm/complex/cproj.c
+++ b/newlib/libm/complex/cproj.c
@@ -29,6 +29,45 @@
  * Marco Atzeri <marco_atzeri@yahoo.it>
  */
 
+/*
+FUNCTION
+        <<cproj>>, <<cprojf>>--- Riemann sphere projection
+ 
+INDEX
+        cproj
+INDEX
+        cprojf
+
+ANSI_SYNOPSIS
+       #include <complex.h>
+       double complex cproj(double complex <[z]>);
+       float complex cprojf(float complex <[z]>);
+
+
+DESCRIPTION
+        These functions compute a projection of <[z]> onto the Riemann 
+        sphere: <[z]> projects to <[z]> except that all complex infinities 
+        (even those with one infinite part and one NaN part) project 
+        to positive infinity on the real axis. If <[z]> has an infinite part,
+        then <<cproj>>(<[z]>) is equivalent to
+
+                 INFINITY + I * copysign(0.0, cimag(z))
+
+        <<cprojf>> is identical to <<cproj>>, except that it performs
+        its calculations on <<floats complex>>.
+
+RETURNS
+        The cproj functions return the value of the projection onto 
+        the Riemann sphere.
+
+PORTABILITY
+        <<cproj>> and <<cprojf>> are ISO C99
+
+QUICKREF
+        <<cproj>> and <<cprojf>> are ISO C99
+
+*/
+
 #include <sys/cdefs.h>
 /*__RCSID("$NetBSD: cproj.c,v 1.3 2010/09/20 17:51:38 christos Exp $"); */
 
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