arm fabs and sqrt: support single-precision-only fpu variants

[musl] / src / math / remainder.c

diff --git a/src/math/remainder.c b/src/math/remainder.c
index 2dede3a..612155f 100644 (file)
--- a/src/math/remainder.c
+++ b/src/math/remainder.c
@@ -1,66 +1,9 @@
-/* origin: FreeBSD /usr/src/lib/msun/src/e_remainder.c */
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunSoft, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-/* remainder(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 fmod() return x-[x/p]chopped*p exactlp.
- */
+#include <math.h>
 
-#include "libm.h"
-
-double remainder(double x, double p)
+double remainder(double x, double y)
 {
-       int32_t hx,hp;
-       uint32_t sx,lx,lp;
-       double p_half;
-
-       EXTRACT_WORDS(hx, lx, x);
-       EXTRACT_WORDS(hp, lp, p);
-       sx = hx & 0x80000000;
-       hp &= 0x7fffffff;
-       hx &= 0x7fffffff;
-
-       /* purge off exception values */
-       if ((hp|lp) == 0 ||                                  /* p = 0 */
-           hx >= 0x7ff00000 ||                              /* x not finite */
-           (hp >= 0x7ff00000 && (hp-0x7ff00000 | lp) != 0)) /* p is NaN */
-               return (x*p)/(x*p);
-
-       if (hp <= 0x7fdfffff)
-               x = fmod(x, p+p);  /* now x < 2p */
-       if (((hx-hp)|(lx-lp)) == 0)
-               return 0.0*x;
-       x = fabs(x);
-       p = fabs(p);
-       if (hp < 0x00200000) {
-               if (x + x > p) {
-                       x -= p;
-                       if (x + x >= p)
-                               x -= p;
-               }
-       } else {
-               p_half = 0.5*p;
-               if (x > p_half) {
-                       x -= p;
-                       if (x >= p_half)
-                               x -= p;
-               }
-       }
-       GET_HIGH_WORD(hx, x);
-       if ((hx&0x7fffffff) == 0)
-               hx = 0;
-       SET_HIGH_WORD(x, hx^sx);
-       return x;
+       int q;
+       return remquo(x, y, &q);
 }
+
+weak_alias(remainder, drem);