remove LFS64 symbol aliases; replace with dynamic linker remapping

[musl] / src / math / ceilf.c

diff --git a/src/math/ceilf.c b/src/math/ceilf.c
index d22688a..869835f 100644 (file)
--- a/src/math/ceilf.c
+++ b/src/math/ceilf.c
@@ -1,55 +1,27 @@
-/* origin: FreeBSD /usr/src/lib/msun/src/s_ceilf.c */
-/*
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
- */
-/*
- * ====================================================
- * 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.
- * ====================================================
- */
-
 #include "libm.h"
 
-static const float huge = 1.0e30;
-
 float ceilf(float x)
 {
-       int32_t i0,j0;
-       uint32_t i;
+       union {float f; uint32_t i;} u = {x};
+       int e = (int)(u.i >> 23 & 0xff) - 0x7f;
+       uint32_t m;
 
-       GET_FLOAT_WORD(i0, x);
-       j0 = ((i0>>23)&0xff) - 0x7f;
-       if (j0 < 23) {
-               if (j0 < 0) {
-                       /* raise inexact if x != 0 */
-                       if (huge+x > 0.0f) {
-                               /* return 0*sign(x) if |x|<1 */
-                               if (i0 < 0)
-                                       i0 = 0x80000000;
-                               else if(i0 != 0)
-                                       i0 = 0x3f800000;
-                       }
-               } else {
-                       i = 0x007fffff>>j0;
-                       if ((i0&i) == 0)
-                               return x; /* x is integral */
-                       /* raise inexact flag */
-                       if (huge+x > 0.0f) {
-                               if (i0 > 0)
-                                       i0 += 0x00800000>>j0;
-                               i0 &= ~i;
-                       }
-               }
+       if (e >= 23)
+               return x;
+       if (e >= 0) {
+               m = 0x007fffff >> e;
+               if ((u.i & m) == 0)
+                       return x;
+               FORCE_EVAL(x + 0x1p120f);
+               if (u.i >> 31 == 0)
+                       u.i += m;
+               u.i &= ~m;
        } else {
-               if (j0 == 0x80)  /* inf or NaN */
-                       return x+x;
-               return x; /* x is integral */
+               FORCE_EVAL(x + 0x1p120f);
+               if (u.i >> 31)
+                       u.f = -0.0;
+               else if (u.i << 1)
+                       u.f = 1.0;
        }
-       SET_FLOAT_WORD(x, i0);
-       return x;
+       return u.f;
 }