1 files changed, 25 insertions, 0 deletions
diff --git a/src/stdlib/frexpl.c b/src/stdlib/frexpl.c
new file mode 100644
index 00000000..ecfff007
--- /dev/null
+++ b/src/stdlib/frexpl.c
@@ -0,0 +1,25 @@
+#include <math.h>
+#include <inttypes.h>
+
+/* This version is for 80-bit little endian long double */
+
+long double frexpl(long double x, int *e)
+{
+	union { long double ld; uint16_t hw[5]; } y = { x };
+	int ee = y.hw[4]&0x7fff;
+
+	if (!ee) {
+		if (x) {
+			x = frexpl(x*0x1p64, e);
+			*e -= 64;
+		} else *e = 0;
+		return x;
+	} else if (ee == 0x7fff) {
+		return x;
+	}
+
+	*e = ee - 0x3ffe;
+	y.hw[4] &= 0x8000;
+	y.hw[4] |= 0x3ffe;
+	return y.ld;
+}