- noieee_src: adapt complex versions of the functions it already

supports (which is all, except the float ones)
ok millert@

1 files changed, 60 insertions, 0 deletions

diff --git a/lib/libm/noieee_src/n_cacos.c b/lib/libm/noieee_src/n_cacos.c
new file mode 100644
index 00000000000..929aa0fa8b3
--- /dev/null
+++ b/lib/libm/noieee_src/n_cacos.c
@@ -0,0 +1,60 @@
+/*	$OpenBSD: n_cacos.c,v 1.1 2008/10/07 22:25:53 martynas Exp $	*/
+/*
+ * Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*							cacos()
+ *
+ *	Complex circular arc cosine
+ *
+ *
+ *
+ * SYNOPSIS:
+ *
+ * double complex cacos();
+ * double complex z, w;
+ *
+ * w = cacos (z);
+ *
+ *
+ *
+ * DESCRIPTION:
+ *
+ *
+ * w = arccos z  =  PI/2 - arcsin z.
+ *
+ *
+ *
+ *
+ * ACCURACY:
+ *
+ *                      Relative error:
+ * arithmetic   domain     # trials      peak         rms
+ *    DEC       -10,+10      5200      1.6e-15      2.8e-16
+ *    IEEE      -10,+10     30000      1.8e-14      2.2e-15
+ */
+
+#include <complex.h>
+#include <math.h>
+
+double complex
+cacos(double complex z)
+{
+	double complex w;
+
+	w = casin (z);
+	w = (M_PI_2 - creal (w)) - cimag (w) * I;
+	return (w);
+}