Merging upstream version 1.71.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/vendor/libm-0.1.4/src/math/k_cosf.rs b/vendor/libm-0.1.4/src/math/k_cosf.rs
new file mode 100644
index 000000000..79d0f238f
--- /dev/null
+++ b/vendor/libm-0.1.4/src/math/k_cosf.rs
@@ -0,0 +1,30 @@
+/* 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.
+ * ====================================================
+ */
+
+/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */
+const C0: f64 = -0.499999997251031003120; /* -0x1ffffffd0c5e81.0p-54 */
+const C1: f64 = 0.0416666233237390631894; /*  0x155553e1053a42.0p-57 */
+const C2: f64 = -0.00138867637746099294692; /* -0x16c087e80f1e27.0p-62 */
+const C3: f64 = 0.0000243904487962774090654; /*  0x199342e0ee5069.0p-68 */
+
+#[inline]
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub(crate) fn k_cosf(x: f64) -> f32 {
+    let z = x * x;
+    let w = z * z;
+    let r = C2 + z * C3;
+    (((1.0 + z * C0) + w * C1) + (w * z) * r) as f32
+}