1 files changed, 49 insertions, 0 deletions
diff --git a/libquadmath/math/frexpq.c b/libquadmath/math/frexpq.c
new file mode 100644
index 000000000..fa3d7836d
--- /dev/null
+++ b/libquadmath/math/frexpq.c
@@ -0,0 +1,49 @@
+/* s_frexpl.c -- long double version of s_frexp.c.
+ * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+ * for non-zero x
+ *	x = frexpq(arg,&exp);
+ * return a __float128 fp quantity x such that 0.5 <= |x| <1.0
+ * and the corresponding binary exponent "exp". That is
+ *	arg = x*2^exp.
+ * If arg is inf, 0.0, or NaN, then frexpq(arg,&exp) returns arg
+ * with *exp=0.
+ */
+
+#include "quadmath-imp.h"
+
+static const __float128
+two114 = 2.0769187434139310514121985316880384E+34Q; /* 0x4071000000000000, 0 */
+
+__float128
+frexpq (__float128 x, int *eptr)
+{
+  uint64_t hx, lx, ix;
+  GET_FLT128_WORDS64(hx,lx,x);
+  ix = 0x7fffffffffffffffULL&hx;
+  *eptr = 0;
+  if(ix>=0x7fff000000000000ULL||((ix|lx)==0)) return x;	/* 0,inf,nan */
+  if (ix<0x0001000000000000ULL) {		/* subnormal */
+    x *= two114;
+    GET_FLT128_MSW64(hx,x);
+    ix = hx&0x7fffffffffffffffULL;
+    *eptr = -114;
+  }
+  *eptr += (ix>>48)-16382;
+  hx = (hx&0x8000ffffffffffffULL) | 0x3ffe000000000000ULL;
+  SET_FLT128_MSW64(x,hx);
+  return x;
+}