From f2eabdb6257c09cf2890dac5e9737912728542af Mon Sep 17 00:00:00 2001
From: mrb0nk500 <b0nk@b0nk.xyz>
Date: Thu, 2 Feb 2023 17:29:19 -0400
Subject: global: Add rest of Dolphin SDK proper, add MSL, and MetroTRK

Finally, it links properly.
---
 src/MSL_C.PPCEABI.bare.H/s_tan.c | 73 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 src/MSL_C.PPCEABI.bare.H/s_tan.c

(limited to 'src/MSL_C.PPCEABI.bare.H/s_tan.c')

diff --git a/src/MSL_C.PPCEABI.bare.H/s_tan.c b/src/MSL_C.PPCEABI.bare.H/s_tan.c
new file mode 100644
index 0000000..6edb666
--- /dev/null
+++ b/src/MSL_C.PPCEABI.bare.H/s_tan.c
@@ -0,0 +1,73 @@
+/* @(#)s_tan.c 1.2 95/01/04 */
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+/* tan(x)
+ * Return tangent function of x.
+ *
+ * kernel function:
+ *	__kernel_tan		... tangent function on [-pi/4,pi/4]
+ *	__ieee754_rem_pio2	... argument reduction routine
+ *
+ * Method.
+ *      Let S,C and T denote the sin, cos and tan respectively on
+ *	[-PI/4, +PI/4]. Reduce the argument x to y1+y2 = x-k*pi/2
+ *	in [-pi/4 , +pi/4], and let n = k mod 4.
+ *	We have
+ *
+ *          n        sin(x)      cos(x)        tan(x)
+ *     ----------------------------------------------------------
+ *	    0	       S	   C		 T
+ *	    1	       C	  -S		-1/T
+ *	    2	      -S	  -C		 T
+ *	    3	      -C	   S		-1/T
+ *     ----------------------------------------------------------
+ *
+ * Special cases:
+ *      Let trig be any of sin, cos, or tan.
+ *      trig(+-INF)  is NaN, with signals;
+ *      trig(NaN)    is that NaN;
+ *
+ * Accuracy:
+ *	TRIG(x) returns trig(x) nearly rounded
+ */
+
+#include "fdlibm.h"
+
+#ifdef __STDC__
+double tan(double x)
+#else
+double tan(x)
+double x;
+#endif
+{
+  double y[2], z = 0.0;
+  _INT32 n, ix;
+
+  /* High word of x. */
+  ix = __HI(x);
+
+  /* |x| ~< pi/4 */
+  ix &= 0x7fffffff;
+  if (ix <= 0x3fe921fb)
+    return __kernel_tan(x, z, 1);
+
+  /* tan(Inf or NaN) is NaN */
+  else if (ix >= 0x7ff00000)
+    return x - x; /* NaN */
+
+  /* argument reduction needed */
+  else {
+    n = __ieee754_rem_pio2(x, y);
+    return __kernel_tan(y[0], y[1], 1 - ((n & 1) << 1)); /*   1 -- n even
+                                                        -1 -- n odd */
+  }
+}
-- 
cgit v1.2.3-13-gbd6f