Add IEEE 754 pack and unpack helpers

[fio.git] / ieee754.h

diff --git a/ieee754.h b/ieee754.h
new file mode 100644 (file)
index 0000000..2087da5
--- /dev/null
+++ b/ieee754.h
@@ -0,0 +1,10 @@
+#ifndef FIO_IEEE754_H
+#define FIO_IEEE754_H
+
+extern uint64_t pack754(long double f, unsigned bits, unsigned expbits);
+extern long double unpack754(uint64_t i, unsigned bits, unsigned expbits);
+
+#define fio_double_to_uint64(val)      pack754((val), 64, 11)
+#define fio_uint64_to_double(val)      unpack754((val), 64, 11)
+
+#endif