feat: add gzip and new headers

1 files changed, 34 insertions, 0 deletions

diff --git a/lib/libm/__cosdf.c b/lib/libm/__cosdf.c
new file mode 100644
index 00000000..cda7195c
--- /dev/null
+++ b/lib/libm/__cosdf.c
@@ -0,0 +1,34 @@
+/* origin: FreeBSD /usr/src/lib/msun/src/k_cosf.c */
+/*
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ * Debugged and optimized by Bruce D. Evans.
+ */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#include "libm.h"
+
+/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */
+static const double C0 = -0x1ffffffd0c5e81.0p-54, /* -0.499999997251031003120 */
+	C1 = 0x155553e1053a42.0p-57,  /*  0.0416666233237390631894 */
+	C2 = -0x16c087e80f1e27.0p-62, /* -0.00138867637746099294692 */
+	C3 = 0x199342e0ee5069.0p-68;  /*  0.0000243904487962774090654 */
+
+float __cosdf(double x)
+{
+	double_t r, w, z;
+
+	/* Try to optimize for parallel evaluation as in __tandf.c. */
+	z = x * x;
+	w = z * z;
+	r = C2 + z * C3;
+	return ((1.0 + z * C0) + w * C1) + (w * z) * r;
+}