1 files changed, 107 insertions, 0 deletions
diff --git a/lib/msun/src/s_cospif.c b/lib/msun/src/s_cospif.c
new file mode 100644
index 000000000000..44d19f165025
--- /dev/null
+++ b/lib/msun/src/s_cospif.c
@@ -0,0 +1,107 @@
+/*-
+ * Copyright (c) 2017,2023 Steven G. Kargl
+ * All rights reserved.
+ *
+ * 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 unmodified, 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 AUTHOR ``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 AUTHOR 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.
+ */
+
+/*
+ * See ../src/s_cospi.c for implementation details.
+ */
+#define	INLINE_KERNEL_SINDF
+#define	INLINE_KERNEL_COSDF
+
+#include "math.h"
+#include "math_private.h"
+#include "k_cosf.c"
+#include "k_sinf.c"
+
+#define	__kernel_cospif(x)	(__kernel_cosdf(M_PI * (x)))
+#define	__kernel_sinpif(x)	(__kernel_sindf(M_PI * (x)))
+
+volatile static const float vzero = 0;
+
+float
+cospif(float x)
+{
+	float ax, c;
+	uint32_t ix, j0;
+
+	GET_FLOAT_WORD(ix, x);
+	ix = ix & 0x7fffffff;
+	SET_FLOAT_WORD(ax, ix);
+
+	if (ix < 0x3f800000) {			/* |x| < 1 */
+		if (ix < 0x3e800000) {		/* |x| < 0.25 */
+			if (ix < 0x38800000) {	/* |x| < 0x1p-14 */
+				/* Raise inexact iff != 0. */
+				if ((int)ax == 0)
+					return (1);
+			}
+			return (__kernel_cospif(ax));
+		}
+
+		if (ix < 0x3f000000)		/* |x| < 0.5 */
+			c = __kernel_sinpif(0.5F - ax);
+		else if (ix < 0x3f400000) {	/* |x| < 0.75 */
+			if (ix == 0x3f000000)
+				return (0);
+			c = -__kernel_sinpif(ax - 0.5F);
+		} else
+			c = -__kernel_cospif(1 - ax);
+		return (c);
+	}
+
+	if (ix < 0x4b000000) {		/* 1 <= |x| < 0x1p23 */
+		FFLOORF(x, j0, ix);	/* Integer part of ax. */
+		ax -= x;
+		GET_FLOAT_WORD(ix, ax);
+
+		if (ix < 0x3f000000) {		/* |x| < 0.5 */
+			if (ix < 0x3e800000)	/* |x| < 0.25 */
+				c = ix == 0 ? 1 : __kernel_cospif(ax);
+			else
+				c = __kernel_sinpif(0.5F - ax);
+		} else {
+			if (ix < 0x3f400000) {	/* |x| < 0.75 */
+				if (ix == 0x3f000000)
+					return (0);
+				c = -__kernel_sinpif(ax - 0.5F);
+			} else
+				c = -__kernel_cospif(1 - ax);
+		}
+
+		j0 = (uint32_t)x;
+		return (j0 & 1 ? -c : c);
+	}
+
+	/* x = +-inf or nan. */
+	if (ix >= 0x7f800000)
+		return (vzero / vzero);
+
+	/*
+	 * For 0x1p23 <= |x| < 0x1p24 need to determine if x is an even
+	 * or odd integer to return +1 or -1.
+	 * For |x| >= 0x1p24, it is always an even integer, so return 1.
+	 */
+	return (ix < 0x4b800000 ? ((ix & 1) ? -1 : 1) : 1);
+}