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Diffstat (limited to 'newlib/libm/math/s_isnan.c')
-rw-r--r--newlib/libm/math/s_isnan.c122
1 files changed, 0 insertions, 122 deletions
diff --git a/newlib/libm/math/s_isnan.c b/newlib/libm/math/s_isnan.c
deleted file mode 100644
index 5d83fc043..000000000
--- a/newlib/libm/math/s_isnan.c
+++ /dev/null
@@ -1,122 +0,0 @@
-
-/* @(#)s_isnan.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.
- * ====================================================
- */
-
-/*
-FUNCTION
- <<isnan>>,<<isnanf>>,<<isinf>>,<<isinff>>,<<finite>>,<<finitef>>---test for exceptional numbers
-
-INDEX
- isnan
-INDEX
- isinf
-INDEX
- finite
-
-INDEX
- isnanf
-INDEX
- isinff
-INDEX
- finitef
-
-ANSI_SYNOPSIS
- #include <ieeefp.h>
- int isnan(double <[arg]>);
- int isinf(double <[arg]>);
- int finite(double <[arg]>);
- int isnanf(float <[arg]>);
- int isinff(float <[arg]>);
- int finitef(float <[arg]>);
-
-TRAD_SYNOPSIS
- #include <ieeefp.h>
- int isnan(<[arg]>)
- double <[arg]>;
- int isinf(<[arg]>)
- double <[arg]>;
- int finite(<[arg]>);
- double <[arg]>;
- int isnanf(<[arg]>);
- float <[arg]>;
- int isinff(<[arg]>);
- float <[arg]>;
- int finitef(<[arg]>);
- float <[arg]>;
-
-
-DESCRIPTION
- These functions provide information on the floating point
- argument supplied.
-
- There are five major number formats -
- o+
- o zero
- a number which contains all zero bits.
- o subnormal
- Is used to represent number with a zero exponent, but a non zero fraction.
- o normal
- A number with an exponent, and a fraction
- o infinity
- A number with an all 1's exponent and a zero fraction.
- o NAN
- A number with an all 1's exponent and a non zero fraction.
-
- o-
-
- <<isnan>> returns 1 if the argument is a nan. <<isinf>>
- returns 1 if the argument is infinity. <<finite>> returns 1 if the
- argument is zero, subnormal or normal.
-
- The <<isnanf>>, <<isinff>> and <<finitef>> perform the same
- operations as their <<isnan>>, <<isinf>> and <<finite>>
- counterparts, but on single precision floating point numbers.
-
-QUICKREF
- isnan - pure
-QUICKREF
- isinf - pure
-QUICKREF
- finite - pure
-QUICKREF
- isnan - pure
-QUICKREF
- isinf - pure
-QUICKREF
- finite - pure
-*/
-
-/*
- * isnan(x) returns 1 is x is nan, else 0;
- * no branching!
- */
-
-#include "fdlibm.h"
-
-#ifndef _DOUBLE_IS_32BITS
-
-#ifdef __STDC__
- int isnan(double x)
-#else
- int isnan(x)
- double x;
-#endif
-{
- __int32_t hx,lx;
- EXTRACT_WORDS(hx,lx,x);
- hx &= 0x7fffffff;
- hx |= (__uint32_t)(lx|(-lx))>>31;
- hx = 0x7ff00000 - hx;
- return (int)(((__uint32_t)(hx))>>31);
-}
-
-#endif /* _DOUBLE_IS_32BITS */