summaryrefslogtreecommitdiff
path: root/src/math/s_modf.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/math/s_modf.c')
-rw-r--r--src/math/s_modf.c71
1 files changed, 0 insertions, 71 deletions
diff --git a/src/math/s_modf.c b/src/math/s_modf.c
deleted file mode 100644
index a5528d6b..00000000
--- a/src/math/s_modf.c
+++ /dev/null
@@ -1,71 +0,0 @@
-/* @(#)s_modf.c 5.1 93/09/24 */
-/*
- * ====================================================
- * 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.
- * ====================================================
- */
-
-/*
- * modf(double x, double *iptr)
- * return fraction part of x, and return x's integral part in *iptr.
- * Method:
- * Bit twiddling.
- *
- * Exception:
- * No exception.
- */
-
-#include <math.h>
-#include "math_private.h"
-
-static const double one = 1.0;
-
-double
-modf(double x, double *iptr)
-{
- int32_t i0,i1,j0;
- uint32_t i;
- EXTRACT_WORDS(i0,i1,x);
- j0 = ((i0>>20)&0x7ff)-0x3ff; /* exponent of x */
- if(j0<20) { /* integer part in high x */
- if(j0<0) { /* |x|<1 */
- INSERT_WORDS(*iptr,i0&0x80000000,0); /* *iptr = +-0 */
- return x;
- } else {
- i = (0x000fffff)>>j0;
- if(((i0&i)|i1)==0) { /* x is integral */
- uint32_t high;
- *iptr = x;
- GET_HIGH_WORD(high,x);
- INSERT_WORDS(x,high&0x80000000,0); /* return +-0 */
- return x;
- } else {
- INSERT_WORDS(*iptr,i0&(~i),0);
- return x - *iptr;
- }
- }
- } else if (j0>51) { /* no fraction part */
- uint32_t high;
- *iptr = x*one;
- GET_HIGH_WORD(high,x);
- INSERT_WORDS(x,high&0x80000000,0); /* return +-0 */
- return x;
- } else { /* fraction part in low x */
- i = ((uint32_t)(0xffffffff))>>(j0-20);
- if((i1&i)==0) { /* x is integral */
- uint32_t high;
- *iptr = x;
- GET_HIGH_WORD(high,x);
- INSERT_WORDS(x,high&0x80000000,0); /* return +-0 */
- return x;
- } else {
- INSERT_WORDS(*iptr,i0,i1&(~i));
- return x - *iptr;
- }
- }
-}