1 files changed, 67 insertions, 0 deletions
diff --git a/gcc-4.9/libquadmath/math/remainderq.c b/gcc-4.9/libquadmath/math/remainderq.c
new file mode 100644
index 000000000..c3f564129
--- /dev/null
+++ b/gcc-4.9/libquadmath/math/remainderq.c
@@ -0,0 +1,67 @@
+/* fmodq.c -- __float128 version of e_fmod.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.
+ * ====================================================
+ */
+
+/* remainderq(x,p)
+ * Return :                  
+ * 	returns  x REM p  =  x - [x/p]*p as if in infinite 
+ * 	precise arithmetic, where [x/p] is the (infinite bit) 
+ *	integer nearest x/p (in half way case choose the even one).
+ * Method : 
+ *	Based on fmodq() return x-[x/p]chopped*p exactlp.
+ */
+
+#include "quadmath-imp.h"
+
+static const __float128 zero = 0.0Q;
+
+__float128
+remainderq (__float128 x, __float128 p)
+{
+  int64_t hx,hp;
+  uint64_t sx,lx,lp;
+  __float128 p_half;
+
+  GET_FLT128_WORDS64(hx,lx,x);
+  GET_FLT128_WORDS64(hp,lp,p);
+  sx = hx&0x8000000000000000ULL;
+  hp &= 0x7fffffffffffffffLL;
+  hx &= 0x7fffffffffffffffLL;
+
+  /* purge off exception values */
+  if((hp|lp)==0) return (x*p)/(x*p); 	/* p = 0 */
+  if((hx>=0x7fff000000000000LL)||			/* x not finite */
+    ((hp>=0x7fff000000000000LL)&&			/* p is NaN */
+    (((hp-0x7fff000000000000LL)|lp)!=0)))
+      return (x*p)/(x*p);
+
+  if (hp<=0x7ffdffffffffffffLL) x = fmodq (x,p+p);	/* now x < 2p */
+  if (((hx-hp)|(lx-lp))==0) return zero*x;
+  x  = fabsq(x);
+  p  = fabsq(p);
+  if (hp<0x0002000000000000LL) {
+      if(x+x>p) {
+	  x-=p;
+	  if(x+x>=p) x -= p;
+      }
+  } else {
+      p_half = 0.5Q*p;
+      if(x>p_half) {
+	  x-=p;
+	  if(x>=p_half) x -= p;
+      }
+  }
+  GET_FLT128_MSW64(hx,x);
+  SET_FLT128_MSW64(x,hx^sx);
+  return x;
+}