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/k_sin.c | 79 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 src/MSL_C.PPCEABI.bare.H/k_sin.c

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

diff --git a/src/MSL_C.PPCEABI.bare.H/k_sin.c b/src/MSL_C.PPCEABI.bare.H/k_sin.c
new file mode 100644
index 0000000..6c4ded3
--- /dev/null
+++ b/src/MSL_C.PPCEABI.bare.H/k_sin.c
@@ -0,0 +1,79 @@
+/* @(#)k_sin.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.
+ * ====================================================
+ */
+
+/* __kernel_sin( x, y, iy)
+ * kernel sin function on [-pi/4, pi/4], pi/4 ~ 0.7854
+ * Input x is assumed to be bounded by ~pi/4 in magnitude.
+ * Input y is the tail of x.
+ * Input iy indicates whether y is 0. (if iy=0, y assume to be 0).
+ *
+ * Algorithm
+ *	1. Since sin(-x) = -sin(x), we need only to consider positive x.
+ *	2. if x < 2^-27 (hx<0x3e400000 0), return x with inexact if x!=0.
+ *	3. sin(x) is approximated by a polynomial of degree 13 on
+ *	   [0,pi/4]
+ *		  	         3            13
+ *	   	sin(x) ~ x + S1*x + ... + S6*x
+ *	   where
+ *
+ * 	|sin(x)         2     4     6     8     10     12  |     -58
+ * 	|----- - (1+S1*x +S2*x +S3*x +S4*x +S5*x  +S6*x   )| <= 2
+ * 	|  x 					           |
+ *
+ *	4. sin(x+y) = sin(x) + sin'(x')*y
+ *		    ~ sin(x) + (1-x*x/2)*y
+ *	   For better accuracy, let
+ *		     3      2      2      2      2
+ *		r = x *(S2+x *(S3+x *(S4+x *(S5+x *S6))))
+ *	   then                   3    2
+ *		sin(x) = x + (S1*x + (x *(r-y/2)+y))
+ */
+
+#include "fdlibm.h"
+
+#ifdef __STDC__
+static const double
+#else
+static double
+#endif
+    half = 5.00000000000000000000e-01, /* 0x3FE00000, 0x00000000 */
+    S1 = -1.66666666666666324348e-01,  /* 0xBFC55555, 0x55555549 */
+    S2 = 8.33333333332248946124e-03,   /* 0x3F811111, 0x1110F8A6 */
+    S3 = -1.98412698298579493134e-04,  /* 0xBF2A01A0, 0x19C161D5 */
+    S4 = 2.75573137070700676789e-06,   /* 0x3EC71DE3, 0x57B1FE7D */
+    S5 = -2.50507602534068634195e-08,  /* 0xBE5AE5E6, 0x8A2B9CEB */
+    S6 = 1.58969099521155010221e-10;   /* 0x3DE5D93A, 0x5ACFD57C */
+
+#ifdef __STDC__
+double __kernel_sin(double x, double y, int iy)
+#else
+double __kernel_sin(x, y, iy)
+double x, y;
+int iy; /* iy=0 if y is zero */
+#endif
+{
+  double z, r, v;
+  int ix;
+  ix = __HI(x) & 0x7fffffff; /* high word of x */
+  if (ix < 0x3e400000)       /* |x| < 2**-27 */
+  {
+    if ((int)x == 0)
+      return x;
+  } /* generate inexact */
+  z = x * x;
+  v = z * x;
+  r = S2 + z * (S3 + z * (S4 + z * (S5 + z * S6)));
+  if (iy == 0)
+    return x + v * (S1 + z * r);
+  else
+    return x - ((z * (half * y - v * r) - y) - v * S1);
+}
-- 
cgit v1.2.3-13-gbd6f