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/e_atan2.c | 143 +++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 src/MSL_C.PPCEABI.bare.H/e_atan2.c

(limited to 'src/MSL_C.PPCEABI.bare.H/e_atan2.c')

diff --git a/src/MSL_C.PPCEABI.bare.H/e_atan2.c b/src/MSL_C.PPCEABI.bare.H/e_atan2.c
new file mode 100644
index 0000000..2902bd8
--- /dev/null
+++ b/src/MSL_C.PPCEABI.bare.H/e_atan2.c
@@ -0,0 +1,143 @@
+/* @(#)e_atan2.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.
+ * ====================================================
+ *
+ */
+
+/* __ieee754_atan2(y,x)
+ * Method :
+ *	1. Reduce y to positive by atan2(y,x)=-atan2(-y,x).
+ *	2. Reduce x to positive by (if x and y are unexceptional):
+ *		ARG (x+iy) = arctan(y/x)   	   ... if x > 0,
+ *		ARG (x+iy) = pi - arctan[y/(-x)]   ... if x < 0,
+ *
+ * Special cases:
+ *
+ *	ATAN2((anything), NaN ) is NaN;
+ *	ATAN2(NAN , (anything) ) is NaN;
+ *	ATAN2(+-0, +(anything but NaN)) is +-0  ;
+ *	ATAN2(+-0, -(anything but NaN)) is +-pi ;
+ *	ATAN2(+-(anything but 0 and NaN), 0) is +-pi/2;
+ *	ATAN2(+-(anything but INF and NaN), +INF) is +-0 ;
+ *	ATAN2(+-(anything but INF and NaN), -INF) is +-pi;
+ *	ATAN2(+-INF,+INF ) is +-pi/4 ;
+ *	ATAN2(+-INF,-INF ) is +-3pi/4;
+ *	ATAN2(+-INF, (anything but,0,NaN, and INF)) is +-pi/2;
+ *
+ * Constants:
+ * The hexadecimal values are the intended ones for the following
+ * constants. The decimal values may be used, provided that the
+ * compiler will convert from decimal to binary accurately enough
+ * to produce the hexadecimal values shown.
+ */
+
+#include "fdlibm.h"
+
+#ifdef __STDC__
+static const double
+#else
+static double
+#endif
+    tiny = 1.0e-300,
+    zero = 0.0, pi_o_4 = 7.8539816339744827900E-01, /* 0x3FE921FB, 0x54442D18 */
+    pi_o_2 = 1.5707963267948965580E+00,             /* 0x3FF921FB, 0x54442D18 */
+    pi = 3.1415926535897931160E+00,                 /* 0x400921FB, 0x54442D18 */
+    pi_lo = 1.2246467991473531772E-16;              /* 0x3CA1A626, 0x33145C07 */
+
+#ifdef __STDC__
+double __ieee754_atan2(double y, double x)
+#else
+double __ieee754_atan2(y, x)
+double y, x;
+#endif
+{
+  double z;
+  _INT32 k, m, hx, hy, ix, iy;
+  _UINT32 lx, ly;
+
+  hx = __HI(x);
+  ix = hx & 0x7fffffff;
+  lx = __LO(x);
+  hy = __HI(y);
+  iy = hy & 0x7fffffff;
+  ly = __LO(y);
+  if (((ix | ((lx | -lx) >> 31)) > 0x7ff00000) ||
+      ((iy | ((ly | -ly) >> 31)) > 0x7ff00000)) /* x or y is NaN */
+    return x + y;
+  if ((hx - 0x3ff00000 | lx) == 0)
+    return atan(y);                        /* x=1.0 */
+  m = ((hy >> 31) & 1) | ((hx >> 30) & 2); /* 2*sign(x)+sign(y) */
+
+  /* when y = 0 */
+  if ((iy | ly) == 0) {
+    switch (m) {
+    case 0:
+    case 1:
+      return y; /* atan(+-0,+anything)=+-0 */
+    case 2:
+      return pi + tiny; /* atan(+0,-anything) = pi */
+    case 3:
+      return -pi - tiny; /* atan(-0,-anything) =-pi */
+    }
+  }
+  /* when x = 0 */
+  if ((ix | lx) == 0)
+    return (hy < 0) ? -pi_o_2 - tiny : pi_o_2 + tiny;
+
+  /* when x is INF */
+  if (ix == 0x7ff00000) {
+    if (iy == 0x7ff00000) {
+      switch (m) {
+      case 0:
+        return pi_o_4 + tiny; /* atan(+INF,+INF) */
+      case 1:
+        return -pi_o_4 - tiny; /* atan(-INF,+INF) */
+      case 2:
+        return 3.0 * pi_o_4 + tiny; /*atan(+INF,-INF)*/
+      case 3:
+        return -3.0 * pi_o_4 - tiny; /*atan(-INF,-INF)*/
+      }
+    } else {
+      switch (m) {
+      case 0:
+        return zero; /* atan(+...,+INF) */
+      case 1:
+        return -zero; /* atan(-...,+INF) */
+      case 2:
+        return pi + tiny; /* atan(+...,-INF) */
+      case 3:
+        return -pi - tiny; /* atan(-...,-INF) */
+      }
+    }
+  }
+  /* when y is INF */
+  if (iy == 0x7ff00000)
+    return (hy < 0) ? -pi_o_2 - tiny : pi_o_2 + tiny;
+
+  /* compute y/x */
+  k = (iy - ix) >> 20;
+  if (k > 60)
+    z = pi_o_2 + 0.5 * pi_lo; /* |y/x| >  2**60 */
+  else if (hx < 0 && k < -60)
+    z = 0.0; /* |y|/x < -2**60 */
+  else
+    z = atan(fabs(y / x)); /* safe to do y/x */
+  switch (m) {
+  case 0:
+    return z; /* atan(+,+) */
+  case 1:
+    __HI(z) ^= 0x80000000;
+    return z; /* atan(-,+) */
+  case 2:
+    return pi - (z - pi_lo); /* atan(+,-) */
+  default:                   /* case 3 */
+    return (z - pi_lo) - pi; /* atan(-,-) */
+  }
+}
-- 
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