Merging upstream version 1.71.1+dfsg1.

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

1 files changed, 31 insertions, 0 deletions

diff --git a/vendor/libm-0.1.4/src/math/k_sinf.rs b/vendor/libm-0.1.4/src/math/k_sinf.rs
new file mode 100644
index 000000000..68fe926c2
--- /dev/null
+++ b/vendor/libm-0.1.4/src/math/k_sinf.rs
@@ -0,0 +1,31 @@
+/* origin: FreeBSD /usr/src/lib/msun/src/k_sinf.c */
+/*
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ * 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.
+ * ====================================================
+ */
+
+/* |sin(x)/x - s(x)| < 2**-37.5 (~[-4.89e-12, 4.824e-12]). */
+const S1: f64 = -0.166666666416265235595; /* -0x15555554cbac77.0p-55 */
+const S2: f64 = 0.0083333293858894631756; /*  0x111110896efbb2.0p-59 */
+const S3: f64 = -0.000198393348360966317347; /* -0x1a00f9e2cae774.0p-65 */
+const S4: f64 = 0.0000027183114939898219064; /*  0x16cd878c3b46a7.0p-71 */
+
+#[inline]
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub(crate) fn k_sinf(x: f64) -> f32 {
+    let z = x * x;
+    let w = z * z;
+    let r = S3 + z * S4;
+    let s = z * x;
+    ((x + s * (S1 + z * S2)) + s * w * r) as f32
+}