1 files changed, 31 insertions, 0 deletions
diff --git a/src/math.c b/src/math.c
new file mode 100644
index 0000000..573e049
--- /dev/null
+++ b/src/math.c
@@ -0,0 +1,31 @@
+#include "math.h"
+#include <stdint.h>
+
+static uint64_t seed;
+
+void srand(unsigned int s) {
+	seed = s-1;
+}
+
+int rand() {
+	seed = 6364136223846793005ULL*seed + 1;
+	return seed>>33;
+}
+
+double fabs(double x) {
+	union {double f; uint64_t i;} u = {x};
+	u.i &= -1ULL/2;
+	return u.f;
+}
+
+double sin(double x);
+double cos(double x);
+double tan(double x);
+double asin(double x);
+double acos(double x);
+double floor(double x);
+double ceil(double x);
+double fmod(double x, double y);
+double sqrt(double x);
+double log(double x);
+double exp(double x);