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/cacos.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

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

diff --git a/newlib/libm/complex/cacos.c b/newlib/libm/complex/cacos.c
index 744b4ad8f..d871617e3 100644
--- a/newlib/libm/complex/cacos.c
+++ b/newlib/libm/complex/cacos.c
@@ -32,6 +32,48 @@
  * Marco Atzeri <marco_atzeri@yahoo.it>
  */
 
+/*
+FUNCTION
+        <<cacos>>, <<cacosf>>---complex arc cosine
+
+INDEX
+        cacos
+INDEX
+        cacosf
+
+ANSI_SYNOPSIS
+       #include <complex.h>
+       double complex cacos(double complex <[z]>);
+       float complex cacosf(float complex <[z]>);
+
+
+DESCRIPTION
+        These functions compute the complex arc cosine of <[z]>,
+        with branch cuts outside the interval [-1, +1] along the real axis.
+
+        <<cacosf>> is identical to <<cacos>>, except that it performs
+        its calculations on <<floats complex>>.
+
+RETURNS
+        @ifnottex
+        These functions return the complex arc cosine value, in the range
+        of a strip mathematically  unbounded  along the imaginary axis
+        and in the interval [0, pi] along the real axis.
+        @end ifnottex
+        @tex
+        These functions return the complex arc cosine value, in the range
+        of a strip mathematically  unbounded  along the imaginary axis
+        and in the interval [<<0>>, $\pi$] along the real axis.
+        @end tex
+
+PORTABILITY
+        <<cacos>> and <<cacosf>> are ISO C99
+
+QUICKREF
+        <<cacos>> and <<cacosf>> are ISO C99
+
+*/
+
 #include <complex.h>
 #include <math.h>
 
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