Merge remote-tracking branch 'origin/stable/10' into devel

1 files changed, 174 insertions, 0 deletions

diff --git a/lib/msun/tests/test-utils.h b/lib/msun/tests/test-utils.h
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+/*-
+ * 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_ */