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Diffstat (limited to 'tools/regression/lib/msun/test-utils.h')
| -rw-r--r-- | tools/regression/lib/msun/test-utils.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/tools/regression/lib/msun/test-utils.h b/tools/regression/lib/msun/test-utils.h new file mode 100644 index 0000000..bf0d6de --- /dev/null +++ b/tools/regression/lib/msun/test-utils.h @@ -0,0 +1,174 @@ +/*- + * Copyright (c) 2005-2013 David Schultz <das@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _TEST_UTILS_H_ +#define _TEST_UTILS_H_ + +#include <complex.h> +#include <fenv.h> + +/* + * Implementations are permitted to define additional exception flags + * not specified in the standard, so it is not necessarily true that + * FE_ALL_EXCEPT == ALL_STD_EXCEPT. + */ +#define ALL_STD_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | \ + FE_OVERFLOW | FE_UNDERFLOW) +#define OPT_INVALID (ALL_STD_EXCEPT & ~FE_INVALID) +#define OPT_INEXACT (ALL_STD_EXCEPT & ~FE_INEXACT) +#define FLT_ULP() ldexpl(1.0, 1 - FLT_MANT_DIG) +#define DBL_ULP() ldexpl(1.0, 1 - DBL_MANT_DIG) +#define LDBL_ULP() ldexpl(1.0, 1 - LDBL_MANT_DIG) + +/* + * Flags that control the behavior of various fpequal* functions. + * XXX This is messy due to merging various notions of "close enough" + * that are best suited for different functions. + * + * CS_REAL + * CS_IMAG + * CS_BOTH + * (cfpequal_cs, fpequal_tol, cfpequal_tol) Whether to check the sign of + * the real part of the result, the imaginary part, or both. + * + * FPE_ABS_ZERO + * (fpequal_tol, cfpequal_tol) If set, treats the tolerance as an absolute + * tolerance when the expected value is 0. This is useful when there is + * round-off error in the input, e.g., cos(Pi/2) ~= 0. + */ +#define CS_REAL 0x01 +#define CS_IMAG 0x02 +#define CS_BOTH (CS_REAL | CS_IMAG) +#define FPE_ABS_ZERO 0x04 + +#ifdef DEBUG +#define debug(...) printf(__VA_ARGS__) +#else +#define debug(...) (void)0 +#endif + +/* + * XXX The ancient version of gcc in the base system doesn't support CMPLXL, + * but we can fake it most of the time. + */ +#ifndef CMPLXL +static inline long double complex +CMPLXL(long double x, long double y) +{ + long double complex z; + + __real__ z = x; + __imag__ z = y; + return (z); +} +#endif + +/* + * Compare d1 and d2 using special rules: NaN == NaN and +0 != -0. + * Fail an assertion if they differ. + */ +static int +fpequal(long double d1, long double d2) +{ + + if (d1 != d2) + return (isnan(d1) && isnan(d2)); + return (copysignl(1.0, d1) == copysignl(1.0, d2)); +} + +/* + * Determine whether x and y are equal, with two special rules: + * +0.0 != -0.0 + * NaN == NaN + * If checksign is 0, we compare the absolute values instead. + */ +static int +fpequal_cs(long double x, long double y, int checksign) +{ + if (isnan(x) && isnan(y)) + return (1); + if (checksign) + return (x == y && !signbit(x) == !signbit(y)); + else + return (fabsl(x) == fabsl(y)); +} + +static int +fpequal_tol(long double x, long double y, long double tol, unsigned int flags) +{ + fenv_t env; + int ret; + + if (isnan(x) && isnan(y)) + return (1); + if (!signbit(x) != !signbit(y) && (flags & CS_BOTH)) + return (0); + if (x == y) + return (1); + if (tol == 0) + return (0); + + /* Hard case: need to check the tolerance. */ + feholdexcept(&env); + /* + * For our purposes here, if y=0, we interpret tol as an absolute + * tolerance. This is to account for roundoff in the input, e.g., + * cos(Pi/2) ~= 0. + */ + if ((flags & FPE_ABS_ZERO) && y == 0.0) + ret = fabsl(x - y) <= fabsl(tol); + else + ret = fabsl(x - y) <= fabsl(y * tol); + fesetenv(&env); + return (ret); +} + +static int +cfpequal(long double complex d1, long double complex d2) +{ + + return (fpequal(creall(d1), creall(d2)) && + fpequal(cimagl(d1), cimagl(d2))); +} + +static int +cfpequal_cs(long double complex x, long double complex y, int checksign) +{ + return (fpequal_cs(creal(x), creal(y), checksign) + && fpequal_cs(cimag(x), cimag(y), checksign)); +} + +static int +cfpequal_tol(long double complex x, long double complex y, long double tol, + unsigned int flags) +{ + return (fpequal_tol(creal(x), creal(y), tol, flags) + && fpequal_tol(cimag(x), cimag(y), tol, flags)); +} + +#endif /* _TEST_UTILS_H_ */ |
