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-rw-r--r--src/math/M_SQRT1_2.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/math/M_SQRT1_2.c b/src/math/M_SQRT1_2.c
new file mode 100644
index 00000000..6f4b61e3
--- /dev/null
+++ b/src/math/M_SQRT1_2.c
@@ -0,0 +1,5 @@
+#include <math.h>
+#define M_SQRT1_2 1.0/sqrt(2.0)
+/*
+XOPEN(4)
+*/