user: implement mlibc as the libc, finally.

It's finally done.. Signed-off-by: kaguya <vpshinomiya@protonmail.com>
2026-05-02 03:31:49 -04:00
parent 2fa39ad85a
commit 9a9b91c940
2387 changed files with 152741 additions and 315 deletions
@@ -0,0 +1,126 @@
+/* $NetBSD: cephes_subr.c,v 1.1 2007/08/20 16:01:33 drochner Exp $ */
+
+/*-
+ * Copyright (c) 2007 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software written by Stephen L. Moshier.
+ * It is redistributed by the NetBSD Foundation by permission of the author.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * imported and modified include for newlib 2010/10/03 
+ * Marco Atzeri <marco_atzeri@yahoo.it>
+ */
+
+#include <complex.h>
+#include <math.h>
+#include "cephes_subr.h"
+
+/* calculate cosh and sinh */
+
+void
+_cchsh(double x, double *c, double *s)
+{
+	double e, ei;
+
+	if (fabs(x) <= 0.5) {
+		*c = cosh(x);
+		*s = sinh(x);
+	} else {
+		e = exp(x);
+		ei = 0.5 / e;
+		e = 0.5 * e;
+		*s = e - ei;
+		*c = e + ei;
+	}
+}
+
+/* Program to subtract nearest integer multiple of PI */
+
+/* extended precision value of PI: */
+static const double DP1 = 3.14159265160560607910E0;
+static const double DP2 = 1.98418714791870343106E-9;
+static const double DP3 = 1.14423774522196636802E-17;
+#define MACHEP 1.1e-16
+
+double
+_redupi(double x)
+{
+	double t;
+	long i;
+
+	t = x / M_PI;
+	if (t >= 0.0)
+		t += 0.5;
+	else
+		t -= 0.5;
+
+	i = t;	/* the multiple */
+	t = i;
+	t = ((x - t * DP1) - t * DP2) - t * DP3;
+	return t;
+}
+
+/* Taylor series expansion for cosh(2y) - cos(2x) */
+
+double
+_ctans(double complex z)
+{
+	double f, x, x2, y, y2, rn, t;
+	double d;
+
+	x = fabs(2.0 * creal(z));
+	y = fabs(2.0 * cimag(z));
+
+	x = _redupi(x);
+
+	x = x * x;
+	y = y * y;
+	x2 = 1.0;
+	y2 = 1.0;
+	f = 1.0;
+	rn = 0.0;
+	d = 0.0;
+	do {
+		rn += 1.0;
+		f *= rn;
+		rn += 1.0;
+		f *= rn;
+		x2 *= x;
+		y2 *= y;
+		t = y2 + x2;
+		t /= f;
+		d += t;
+
+		rn += 1.0;
+		f *= rn;
+		rn += 1.0;
+		f *= rn;
+		x2 *= x;
+		y2 *= y;
+		t = y2 - x2;
+		t /= f;
+		d += t;
+	} while (fabs(t/d) > MACHEP);
+	return d;
+}