From 1ad6bbe4b3baee113bf6f37e0d02030910543fbd Mon Sep 17 00:00:00 2001
From: Lizzy Fleckenstein <lizzy@vlhl.dev>
Date: Thu, 21 Dec 2023 06:40:40 +0100
Subject: add maths library and print_dbl

---
 stage3/math.h | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 stage3/math.h

(limited to 'stage3/math.h')

diff --git a/stage3/math.h b/stage3/math.h
new file mode 100644
index 0000000..6f7ae58
--- /dev/null
+++ b/stage3/math.h
@@ -0,0 +1,62 @@
+#ifndef MATH_H
+#define MATH_H
+
+// for now, stuff will be added in this file as it is needed
+
+#define PI 3.14159265358979323846
+
+/*double get_pi()
+{
+	double pi;
+	asm("fldpi; fstpl %0":"=m"(pi));
+	return pi;
+}*/
+
+static inline double sin(double x)
+{
+	asm("fldl %1; fsin; fstpl %0":"=m"(x):"m"(x));
+	return x;
+}
+
+static inline double rad(double x)
+{
+	return PI / 180.0 * x;
+}
+
+static inline double deg(double x)
+{
+	return 180.0 / PI * x;
+}
+
+static inline double fabs(double x)
+{
+	asm("fldl %1; fabs; fstpl %0":"=m"(x):"m"(x));
+	return x;
+}
+
+static inline double atan2(double x, double y)
+{
+	asm("fldl %1; fldl %2; fpatan; fstpl %0":"=m"(x):"m"(x),"m"(y));
+	return x;
+}
+
+static inline double sqrt(double x)
+{
+	asm("fldl %0; fsqrt; fstpl %0":"=m"(x):"m"(x));
+	return x;
+}
+
+static inline double acos(double x)
+{
+	return atan2(sqrt(1-x*x),x);
+}
+
+static inline long ipow(long b, unsigned long exp)
+{
+	long x = 1;
+	for (unsigned long i = 0; i < exp; i++)
+		x *= b;
+	return x;
+}
+
+#endif
-- 
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