add numerical recipes library

2025-09-12 18:55:25 +09:00
parent d4dff245bd
commit 2c75620ec9
1344 changed files with 63869 additions and 0 deletions
--- a/lib/nr/cpp/recipes/irbit1.cpp
+++ b/lib/nr/cpp/recipes/irbit1.cpp
@@ -0,0 +1,13 @@
+#include "nr.h"
+
+int NR::irbit1(unsigned long &iseed)
+{
+	unsigned long newbit;
+
+	newbit =  ((iseed >> 17) & 1)
+		^ ((iseed >> 4) & 1)
+		^ ((iseed >> 1) & 1)
+		^ (iseed & 1);
+	iseed=(iseed << 1) | newbit;
+	return int(newbit);
+}