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Diffstat (limited to 'newlib/libm/math/w_exp.c')
-rw-r--r--newlib/libm/math/w_exp.c136
1 files changed, 0 insertions, 136 deletions
diff --git a/newlib/libm/math/w_exp.c b/newlib/libm/math/w_exp.c
deleted file mode 100644
index eb36390c2..000000000
--- a/newlib/libm/math/w_exp.c
+++ /dev/null
@@ -1,136 +0,0 @@
-
-/* @(#)w_exp.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
- <<exp>>, <<expf>>---exponential
-INDEX
- exp
-INDEX
- expf
-
-ANSI_SYNOPSIS
- #include <math.h>
- double exp(double <[x]>);
- float expf(float <[x]>);
-
-TRAD_SYNOPSIS
- #include <math.h>
- double exp(<[x]>);
- double <[x]>;
-
- float expf(<[x]>);
- float <[x]>;
-
-DESCRIPTION
- <<exp>> and <<expf>> calculate the exponential of <[x]>, that is,
- @ifnottex
- e raised to the power <[x]> (where e
- @end ifnottex
- @tex
- $e^x$ (where $e$
- @end tex
- is the base of the natural system of logarithms, approximately 2.71828).
-
- You can use the (non-ANSI) function <<matherr>> to specify
- error handling for these functions.
-
-RETURNS
- On success, <<exp>> and <<expf>> return the calculated value.
- If the result underflows, the returned value is <<0>>. If the
- result overflows, the returned value is <<HUGE_VAL>>. In
- either case, <<errno>> is set to <<ERANGE>>.
-
-PORTABILITY
- <<exp>> is ANSI C. <<expf>> is an extension.
-
-*/
-
-/*
- * wrapper exp(x)
- */
-
-#include "fdlibm.h"
-#include <errno.h>
-
-#ifndef _DOUBLE_IS_32BITS
-
-#ifdef __STDC__
-static const double
-#else
-static double
-#endif
-o_threshold= 7.09782712893383973096e+02, /* 0x40862E42, 0xFEFA39EF */
-u_threshold= -7.45133219101941108420e+02; /* 0xc0874910, 0xD52D3051 */
-
-#ifdef __STDC__
- double exp(double x) /* wrapper exp */
-#else
- double exp(x) /* wrapper exp */
- double x;
-#endif
-{
-#ifdef _IEEE_LIBM
- return __ieee754_exp(x);
-#else
- double z;
- struct exception exc;
- z = __ieee754_exp(x);
- if(_LIB_VERSION == _IEEE_) return z;
- if(finite(x)) {
- if(x>o_threshold) {
- /* exp(finite) overflow */
-#ifndef HUGE_VAL
-#define HUGE_VAL inf
- double inf = 0.0;
-
- SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */
-#endif
- exc.type = OVERFLOW;
- exc.name = "exp";
- exc.err = 0;
- exc.arg1 = exc.arg2 = x;
- if (_LIB_VERSION == _SVID_)
- exc.retval = HUGE;
- else
- exc.retval = HUGE_VAL;
- if (_LIB_VERSION == _POSIX_)
- errno = ERANGE;
- else if (!matherr(&exc)) {
- errno = ERANGE;
- }
- if (exc.err != 0)
- errno = exc.err;
- return exc.retval;
- } else if(x<u_threshold) {
- /* exp(finite) underflow */
- exc.type = UNDERFLOW;
- exc.name = "exp";
- exc.err = 0;
- exc.arg1 = exc.arg2 = x;
- exc.retval = 0.0;
- if (_LIB_VERSION == _POSIX_)
- errno = ERANGE;
- else if (!matherr(&exc)) {
- errno = ERANGE;
- }
- if (exc.err != 0)
- errno = exc.err;
- return exc.retval;
- }
- }
- return z;
-#endif
-}
-
-#endif /* defined(_DOUBLE_IS_32BITS) */