8a7d0e8ce3
FreeBSD test suite under lib/msun/tests MFC after: 3 weeks X-MFC with: r292328 Sponsored by: EMC / Isilon Storage Division
175 lines
4.9 KiB
C
175 lines
4.9 KiB
C
/*-
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* Copyright (c) 2005-2013 David Schultz <das@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _TEST_UTILS_H_
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#define _TEST_UTILS_H_
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#include <complex.h>
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#include <fenv.h>
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/*
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* Implementations are permitted to define additional exception flags
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* not specified in the standard, so it is not necessarily true that
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* FE_ALL_EXCEPT == ALL_STD_EXCEPT.
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*/
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#define ALL_STD_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | \
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FE_OVERFLOW | FE_UNDERFLOW)
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#define OPT_INVALID (ALL_STD_EXCEPT & ~FE_INVALID)
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#define OPT_INEXACT (ALL_STD_EXCEPT & ~FE_INEXACT)
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#define FLT_ULP() ldexpl(1.0, 1 - FLT_MANT_DIG)
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#define DBL_ULP() ldexpl(1.0, 1 - DBL_MANT_DIG)
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#define LDBL_ULP() ldexpl(1.0, 1 - LDBL_MANT_DIG)
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/*
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* Flags that control the behavior of various fpequal* functions.
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* XXX This is messy due to merging various notions of "close enough"
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* that are best suited for different functions.
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*
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* CS_REAL
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* CS_IMAG
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* CS_BOTH
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* (cfpequal_cs, fpequal_tol, cfpequal_tol) Whether to check the sign of
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* the real part of the result, the imaginary part, or both.
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*
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* FPE_ABS_ZERO
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* (fpequal_tol, cfpequal_tol) If set, treats the tolerance as an absolute
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* tolerance when the expected value is 0. This is useful when there is
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* round-off error in the input, e.g., cos(Pi/2) ~= 0.
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*/
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#define CS_REAL 0x01
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#define CS_IMAG 0x02
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#define CS_BOTH (CS_REAL | CS_IMAG)
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#define FPE_ABS_ZERO 0x04
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#ifdef DEBUG
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#define debug(...) printf(__VA_ARGS__)
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#else
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#define debug(...) (void)0
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#endif
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/*
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* XXX The ancient version of gcc in the base system doesn't support CMPLXL,
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* but we can fake it most of the time.
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*/
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#ifndef CMPLXL
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static inline long double complex
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CMPLXL(long double x, long double y)
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{
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long double complex z;
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__real__ z = x;
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__imag__ z = y;
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return (z);
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}
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#endif
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/*
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* Compare d1 and d2 using special rules: NaN == NaN and +0 != -0.
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* Fail an assertion if they differ.
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*/
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static int
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fpequal(long double d1, long double d2)
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{
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if (d1 != d2)
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return (isnan(d1) && isnan(d2));
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return (copysignl(1.0, d1) == copysignl(1.0, d2));
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}
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/*
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* Determine whether x and y are equal, with two special rules:
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* +0.0 != -0.0
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* NaN == NaN
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* If checksign is 0, we compare the absolute values instead.
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*/
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static int
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fpequal_cs(long double x, long double y, int checksign)
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{
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if (isnan(x) && isnan(y))
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return (1);
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if (checksign)
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return (x == y && !signbit(x) == !signbit(y));
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else
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return (fabsl(x) == fabsl(y));
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}
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static int
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fpequal_tol(long double x, long double y, long double tol, unsigned int flags)
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{
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fenv_t env;
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int ret;
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if (isnan(x) && isnan(y))
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return (1);
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if (!signbit(x) != !signbit(y) && (flags & CS_BOTH))
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return (0);
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if (x == y)
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return (1);
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if (tol == 0)
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return (0);
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/* Hard case: need to check the tolerance. */
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feholdexcept(&env);
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/*
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* For our purposes here, if y=0, we interpret tol as an absolute
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* tolerance. This is to account for roundoff in the input, e.g.,
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* cos(Pi/2) ~= 0.
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*/
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if ((flags & FPE_ABS_ZERO) && y == 0.0)
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ret = fabsl(x - y) <= fabsl(tol);
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else
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ret = fabsl(x - y) <= fabsl(y * tol);
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fesetenv(&env);
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return (ret);
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}
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static int
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cfpequal(long double complex d1, long double complex d2)
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{
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return (fpequal(creall(d1), creall(d2)) &&
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fpequal(cimagl(d1), cimagl(d2)));
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}
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static int
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cfpequal_cs(long double complex x, long double complex y, int checksign)
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{
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return (fpequal_cs(creal(x), creal(y), checksign)
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&& fpequal_cs(cimag(x), cimag(y), checksign));
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}
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static int
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cfpequal_tol(long double complex x, long double complex y, long double tol,
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unsigned int flags)
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{
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return (fpequal_tol(creal(x), creal(y), tol, flags)
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&& fpequal_tol(cimag(x), cimag(y), tol, flags));
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}
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#endif /* _TEST_UTILS_H_ */
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