Updates for ccosh[f] and csinh[f]stable/13

* lib/msun/src/s_ccosh.c:
  . Update Copyright years.
  . sin() and cos() are needed at the same time, so use sincos() to
    compute values.  This does argument reduction once instead of twice.
  . Replace '* 0.5' with '/ 2'. This reduces diff with s_ccoshf.c.
  . For (LDBL_MANT_DIG == 53), add weak references for ccoshl and ccosl.

* lib/msun/src/s_ccoshf.c:
  . Update Copyright years.
  . sin() and cos() are needed at the same time, so use sincos() to
    compute values.  This does argument reduction once instead of twice.
  . Replace '* 0.5F' with '/ 2'. This reduces diff with s_ccoshf.c.

* lib/msun/src/s_csinh.c:
  . Update Copyright years.
  . sin() and cos() are needed at the same time, so use sincos() to
    compute values.  This does argument reduction once instead of twice.
  . Replace '* 0.5' with '/ 2'. This reduces diff with s_csinhf.c.
  . For (LDBL_MANT_DIG == 53), add weak references for csinhl and csinl.

* lib/msun/src/s_csinhf.c:
  . Update Copyright years.
  . sin() and cos() are needed at the same time, so use sincos() to
    compute values.  This does argument reduction once instead of twice.
  . Replace '* 0.5F' with '/ 2'. This reduces diff with s_ccoshf.c.

PR:		288740
MFC after:	1 week

(cherry picked from commit a1d051bc878decc761b37cf8771ead100cc05768)

4 files changed, 54 insertions, 28 deletions

diff --git a/lib/msun/src/s_ccosh.c b/lib/msun/src/s_ccosh.c
index 95ed3a32ddd7..145d9673f392 100644
--- a/lib/msun/src/s_ccosh.c
+++ b/lib/msun/src/s_ccosh.c
@@ -1,7 +1,7 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause
  *
- * Copyright (c) 2005 Bruce D. Evans and Steven G. Kargl
+ * Copyright (c) 2005-2025 Bruce D. Evans and Steven G. Kargl
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -49,7 +49,7 @@ static const double huge = 0x1p1023;
 double complex
 ccosh(double complex z)
 {
-	double x, y, h;
+	double c, h, s, x, y;
 	int32_t hx, hy, ix, iy, lx, ly;
 
 	x = creal(z);
@@ -65,14 +65,16 @@ ccosh(double complex z)
 	if (ix < 0x7ff00000 && iy < 0x7ff00000) {
 		if ((iy | ly) == 0)
 			return (CMPLX(cosh(x), x * y));
+
+		sincos(y, &s, &c);
 		if (ix < 0x40360000)	/* |x| < 22: normal case */
-			return (CMPLX(cosh(x) * cos(y), sinh(x) * sin(y)));
+			return (CMPLX(cosh(x) * c, sinh(x) * s));
 
 		/* |x| >= 22, so cosh(x) ~= exp(|x|) */
 		if (ix < 0x40862e42) {
 			/* x < 710: exp(|x|) won't overflow */
-			h = exp(fabs(x)) * 0.5;
-			return (CMPLX(h * cos(y), copysign(h, x) * sin(y)));
+			h = exp(fabs(x)) / 2;
+			return (CMPLX(h * c, copysign(h, x) * s));
 		} else if (ix < 0x4096bbaa) {
 			/* x < 1455: scale to avoid overflow */
 			z = __ldexp_cexp(CMPLX(fabs(x), y), -1);
@@ -80,7 +82,7 @@ ccosh(double complex z)
 		} else {
 			/* x >= 1455: the result always overflows */
 			h = huge * x;
-			return (CMPLX(h * h * cos(y), h * sin(y)));
+			return (CMPLX(h * h * c, h * s));
 		}
 	}
 
@@ -130,7 +132,9 @@ ccosh(double complex z)
 	if (ix == 0x7ff00000 && lx == 0) {
 		if (iy >= 0x7ff00000)
 			return (CMPLX(INFINITY, x * (y - y)));
-		return (CMPLX(INFINITY * cos(y), x * sin(y)));
+
+		sincos(y, &s, &c);
+		return (CMPLX(INFINITY * c, x * s));
 	}
 
 	/*
@@ -155,3 +159,8 @@ ccos(double complex z)
 	/* ccos(z) = ccosh(I * z) */
 	return (ccosh(CMPLX(-cimag(z), creal(z))));
 }
+
+#if (LDBL_MANT_DIG == 53)
+__weak_reference(ccosh, ccoshl);
+__weak_reference(ccos, ccosl);
+#endif
diff --git a/lib/msun/src/s_ccoshf.c b/lib/msun/src/s_ccoshf.c
index ba97a390c832..2851157ead42 100644
--- a/lib/msun/src/s_ccoshf.c
+++ b/lib/msun/src/s_ccoshf.c
@@ -1,7 +1,7 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause
  *
- * Copyright (c) 2005 Bruce D. Evans and Steven G. Kargl
+ * Copyright (c) 2005-2025 Bruce D. Evans and Steven G. Kargl
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,7 +41,7 @@ static const float huge = 0x1p127;
 float complex
 ccoshf(float complex z)
 {
-	float x, y, h;
+	float c, h, s, x, y;
 	int32_t hx, hy, ix, iy;
 
 	x = crealf(z);
@@ -56,14 +56,16 @@ ccoshf(float complex z)
 	if (ix < 0x7f800000 && iy < 0x7f800000) {
 		if (iy == 0)
 			return (CMPLXF(coshf(x), x * y));
+
+		sincosf(y, &s, &c);
 		if (ix < 0x41100000)	/* |x| < 9: normal case */
-			return (CMPLXF(coshf(x) * cosf(y), sinhf(x) * sinf(y)));
+			return (CMPLXF(coshf(x) * c, sinhf(x) * s));
 
 		/* |x| >= 9, so cosh(x) ~= exp(|x|) */
 		if (ix < 0x42b17218) {
 			/* x < 88.7: expf(|x|) won't overflow */
-			h = expf(fabsf(x)) * 0.5F;
-			return (CMPLXF(h * cosf(y), copysignf(h, x) * sinf(y)));
+			h = expf(fabsf(x)) / 2;
+			return (CMPLXF(h * c, copysignf(h, x) * s));
 		} else if (ix < 0x4340b1e7) {
 			/* x < 192.7: scale to avoid overflow */
 			z = __ldexp_cexpf(CMPLXF(fabsf(x), y), -1);
@@ -71,7 +73,7 @@ ccoshf(float complex z)
 		} else {
 			/* x >= 192.7: the result always overflows */
 			h = huge * x;
-			return (CMPLXF(h * h * cosf(y), h * sinf(y)));
+			return (CMPLXF(h * h * c, h * s));
 		}
 	}
 
@@ -87,7 +89,9 @@ ccoshf(float complex z)
 	if (ix == 0x7f800000) {
 		if (iy >= 0x7f800000)
 			return (CMPLXF(INFINITY, x * (y - y)));
-		return (CMPLXF(INFINITY * cosf(y), x * sinf(y)));
+
+		sincosf(y, &s, &c);
+		return (CMPLXF(INFINITY * c, x * s));
 	}
 
 	return (CMPLXF(((long double)x * x) * (y - y),
diff --git a/lib/msun/src/s_csinh.c b/lib/msun/src/s_csinh.c
index 1bd78b1e49bf..8ea97970af7f 100644
--- a/lib/msun/src/s_csinh.c
+++ b/lib/msun/src/s_csinh.c
@@ -1,7 +1,7 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause
  *
- * Copyright (c) 2005 Bruce D. Evans and Steven G. Kargl
+ * Copyright (c) 2005-2025 Bruce D. Evans and Steven G. Kargl
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -49,7 +49,7 @@ static const double huge = 0x1p1023;
 double complex
 csinh(double complex z)
 {
-	double x, y, h;
+	double c, h, s, x, y;
 	int32_t hx, hy, ix, iy, lx, ly;
 
 	x = creal(z);
@@ -65,14 +65,16 @@ csinh(double complex z)
 	if (ix < 0x7ff00000 && iy < 0x7ff00000) {
 		if ((iy | ly) == 0)
 			return (CMPLX(sinh(x), y));
+
+		sincos(y, &s, &c);
 		if (ix < 0x40360000)	/* |x| < 22: normal case */
-			return (CMPLX(sinh(x) * cos(y), cosh(x) * sin(y)));
+			return (CMPLX(sinh(x) * c, cosh(x) * s));
 
 		/* |x| >= 22, so cosh(x) ~= exp(|x|) */
 		if (ix < 0x40862e42) {
 			/* x < 710: exp(|x|) won't overflow */
-			h = exp(fabs(x)) * 0.5;
-			return (CMPLX(copysign(h, x) * cos(y), h * sin(y)));
+			h = exp(fabs(x)) / 2;
+			return (CMPLX(copysign(h, x) * c, h * s));
 		} else if (ix < 0x4096bbaa) {
 			/* x < 1455: scale to avoid overflow */
 			z = __ldexp_cexp(CMPLX(fabs(x), y), -1);
@@ -80,7 +82,7 @@ csinh(double complex z)
 		} else {
 			/* x >= 1455: the result always overflows */
 			h = huge * x;
-			return (CMPLX(h * cos(y), h * h * sin(y)));
+			return (CMPLX(h * c, h * h * s));
 		}
 	}
 
@@ -129,7 +131,9 @@ csinh(double complex z)
 	if (ix == 0x7ff00000 && lx == 0) {
 		if (iy >= 0x7ff00000)
 			return (CMPLX(x, y - y));
-		return (CMPLX(x * cos(y), INFINITY * sin(y)));
+
+		sincos(y, &s, &c);
+		return (CMPLX(x * c, INFINITY * s));
 	}
 
 	/*
@@ -155,3 +159,8 @@ csin(double complex z)
 	z = csinh(CMPLX(cimag(z), creal(z)));
 	return (CMPLX(cimag(z), creal(z)));
 }
+
+#if (LDBL_MANT_DIG == 53)
+__weak_reference(csinh, csinhl);
+__weak_reference(csin, csinl);
+#endif
diff --git a/lib/msun/src/s_csinhf.c b/lib/msun/src/s_csinhf.c
index b1f333955e53..530ac63b6a27 100644
--- a/lib/msun/src/s_csinhf.c
+++ b/lib/msun/src/s_csinhf.c
@@ -1,7 +1,7 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause
  *
- * Copyright (c) 2005 Bruce D. Evans and Steven G. Kargl
+ * Copyright (c) 2005-2025 Bruce D. Evans and Steven G. Kargl
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,7 +41,7 @@ static const float huge = 0x1p127;
 float complex
 csinhf(float complex z)
 {
-	float x, y, h;
+	float c, h, s, x, y;
 	int32_t hx, hy, ix, iy;
 
 	x = crealf(z);
@@ -56,14 +56,16 @@ csinhf(float complex z)
 	if (ix < 0x7f800000 && iy < 0x7f800000) {
 		if (iy == 0)
 			return (CMPLXF(sinhf(x), y));
+
+		sincosf(y, &s, &c);
 		if (ix < 0x41100000)	/* |x| < 9: normal case */
-			return (CMPLXF(sinhf(x) * cosf(y), coshf(x) * sinf(y)));
+			return (CMPLXF(sinhf(x) * c, coshf(x) * s));
 
 		/* |x| >= 9, so cosh(x) ~= exp(|x|) */
 		if (ix < 0x42b17218) {
 			/* x < 88.7: expf(|x|) won't overflow */
-			h = expf(fabsf(x)) * 0.5F;
-			return (CMPLXF(copysignf(h, x) * cosf(y), h * sinf(y)));
+			h = expf(fabsf(x)) / 2;
+			return (CMPLXF(copysignf(h, x) * c, h * s));
 		} else if (ix < 0x4340b1e7) {
 			/* x < 192.7: scale to avoid overflow */
 			z = __ldexp_cexpf(CMPLXF(fabsf(x), y), -1);
@@ -71,7 +73,7 @@ csinhf(float complex z)
 		} else {
 			/* x >= 192.7: the result always overflows */
 			h = huge * x;
-			return (CMPLXF(h * cosf(y), h * h * sinf(y)));
+			return (CMPLXF(h * c, h * h * s));
 		}
 	}
 
@@ -87,7 +89,9 @@ csinhf(float complex z)
 	if (ix == 0x7f800000) {
 		if (iy >= 0x7f800000)
 			return (CMPLXF(x, y - y));
-		return (CMPLXF(x * cosf(y), INFINITY * sinf(y)));
+
+		sincosf(y, &s, &c);
+		return (CMPLXF(x * c, INFINITY * s));
 	}
 
 	return (CMPLXF(((long double)x + x) * (y - y),