From: "H.J. Lu" <hjl.tools@gmail.com>
To: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Cc: libc-alpha@sourceware.org
Subject: Re: [PATCH v2 02/10] math: Add test to check if floor raise inexact floating-point exception
Date: Wed, 3 Apr 2024 05:55:18 -0700 [thread overview]
Message-ID: <CAMe9rOrwxRh-87x=YL5yh-p7wnEf+WpwdTXG14u5B3+xkg2Eaw@mail.gmail.com> (raw)
In-Reply-To: <20240403121150.1018799-3-adhemerval.zanella@linaro.org>
On Wed, Apr 3, 2024 at 5:11 AM Adhemerval Zanella
<adhemerval.zanella@linaro.org> wrote:
>
> It is not allowed anymore on ISO C23.
> ---
> math/Makefile | 4 ++
> math/test-floor-except-2.c | 67 ++++++++++++++++++++++++++++++
> math/test-floor-except.c | 85 ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 156 insertions(+)
> create mode 100644 math/test-floor-except-2.c
> create mode 100644 math/test-floor-except.c
>
> diff --git a/math/Makefile b/math/Makefile
> index 1017026d23..8ab2582d69 100644
> --- a/math/Makefile
> +++ b/math/Makefile
> @@ -512,6 +512,8 @@ tests = \
> test-fetestexceptflag \
> test-fexcept \
> test-fexcept-traps \
> + test-floor-except \
> + test-floor-except-2 \
> test-flt-eval-method \
> test-fp-ilogb-constants \
> test-fp-llogb-constants \
> @@ -993,6 +995,8 @@ CFLAGS-test-nan-const.c += -fno-builtin
>
> CFLAGS-test-ceil-except.c += -fno-builtin
> CFLAGS-test-ceil-except-2.c += -fno-builtin
> +CFLAGS-test-floor-except.c += -fno-builtin
> +CFLAGS-test-floor-except-2.c += -fno-builtin
>
> include ../Rules
>
> diff --git a/math/test-floor-except-2.c b/math/test-floor-except-2.c
> new file mode 100644
> index 0000000000..d99e835909
> --- /dev/null
> +++ b/math/test-floor-except-2.c
> @@ -0,0 +1,67 @@
> +/* Test floor functions do not disable exception traps.
> + Copyright (C) 2024 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <fenv.h>
> +#include <math.h>
> +#include <stdio.h>
> +
> +#ifndef FE_INEXACT
> +# define FE_INEXACT 0
> +#endif
> +
> +#define TEST_FUNC(NAME, FLOAT, SUFFIX) \
> +static int \
> +NAME (void) \
> +{ \
> + int result = 0; \
> + volatile FLOAT a, b __attribute__ ((unused)); \
> + a = 1.5; \
> + /* floor must work when traps on "inexact" are enabled. */ \
> + b = floor ## SUFFIX (a); \
> + /* And it must have left those traps enabled. */ \
> + if (fegetexcept () == FE_INEXACT) \
> + puts ("PASS: " #FLOAT); \
> + else \
> + { \
> + puts ("FAIL: " #FLOAT); \
> + result = 1; \
> + } \
> + return result; \
> +}
> +
> +TEST_FUNC (float_test, float, f)
> +TEST_FUNC (double_test, double, )
> +TEST_FUNC (ldouble_test, long double, l)
> +
> +static int
> +do_test (void)
> +{
> + if (feenableexcept (FE_INEXACT) == -1)
> + {
> + puts ("enabling FE_INEXACT traps failed, cannot test");
> + return 77;
> + }
> + int result = float_test ();
> + feenableexcept (FE_INEXACT);
> + result |= double_test ();
> + feenableexcept (FE_INEXACT);
> + result |= ldouble_test ();
> + return result;
> +}
> +
> +#include <support/test-driver.c>
> diff --git a/math/test-floor-except.c b/math/test-floor-except.c
> new file mode 100644
> index 0000000000..a957c059e2
> --- /dev/null
> +++ b/math/test-floor-except.c
> @@ -0,0 +1,85 @@
> +/* Test floor functions do not clear exceptions.
> + Copyright (C) 2024 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <fenv.h>
> +#include <math.h>
> +#include <stdbool.h>
> +#include <stdio.h>
> +
> +#include <math-tests.h>
> +
> +#ifndef FE_INVALID
> +# define FE_INVALID 0
> +#endif
> +
> +static bool any_supported = false;
> +
> +#define TEST_FUNC(NAME, FLOAT, SUFFIX) \
> +static int \
> +NAME (void) \
> +{ \
> + int result = 0; \
> + if (!EXCEPTION_TESTS (FLOAT)) \
> + return 0; \
> + any_supported = true; \
> + volatile FLOAT a, b __attribute__ ((unused)); \
> + a = 1.0; \
> + /* floor must not clear already-raised exceptions. */ \
> + feraiseexcept (FE_ALL_EXCEPT); \
> + b = floor ## SUFFIX (a); \
> + if (fetestexcept (FE_ALL_EXCEPT) == FE_ALL_EXCEPT) \
> + puts ("PASS: " #FLOAT); \
> + else \
> + { \
> + puts ("FAIL: " #FLOAT); \
> + result = 1; \
> + } \
> + /* But it mustn't lose exceptions from sNaN arguments. */ \
> + if (SNAN_TESTS (FLOAT)) \
> + { \
> + static volatile FLOAT snan = __builtin_nans ## SUFFIX (""); \
> + volatile FLOAT c __attribute__ ((unused)); \
> + feclearexcept (FE_ALL_EXCEPT); \
> + c = floor ## SUFFIX (snan); \
> + if (fetestexcept (FE_INVALID) == FE_INVALID) \
> + puts ("PASS: " #FLOAT " sNaN"); \
> + else \
> + { \
> + puts ("FAIL: " #FLOAT " sNaN"); \
> + result = 1; \
> + } \
> + } \
> + return result; \
> +}
> +
> +TEST_FUNC (float_test, float, f)
> +TEST_FUNC (double_test, double, )
> +TEST_FUNC (ldouble_test, long double, l)
> +
> +static int
> +do_test (void)
> +{
> + int result = float_test ();
> + result |= double_test ();
> + result |= ldouble_test ();
> + if (!any_supported)
> + return 77;
> + return result;
> +}
> +
> +#include <support/test-driver.c>
> --
> 2.34.1
>
LGTM.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Thanks.
--
H.J.
next prev parent reply other threads:[~2024-04-03 12:56 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-03 12:11 [PATCH v2 00/10] Improve rounding to interger function for C23 Adhemerval Zanella
2024-04-03 12:11 ` [PATCH v2 01/10] math: Add test to check if ceil raise inexact floating-point exception Adhemerval Zanella
2024-04-03 12:54 ` H.J. Lu
2024-04-03 12:11 ` [PATCH v2 02/10] math: Add test to check if floor " Adhemerval Zanella
2024-04-03 12:55 ` H.J. Lu [this message]
2024-04-03 12:11 ` [PATCH v2 03/10] math: Add test to check if trunc " Adhemerval Zanella
2024-04-03 12:55 ` H.J. Lu
2024-04-03 12:11 ` [PATCH v2 04/10] math: Add test to check if round " Adhemerval Zanella
2024-04-03 12:56 ` H.J. Lu
2024-04-03 12:11 ` [PATCH v2 05/10] x86: Do not raise inexact exception on ceill Adhemerval Zanella
2024-04-03 13:04 ` H.J. Lu
2024-04-03 13:15 ` Adhemerval Zanella Netto
2024-04-03 13:28 ` H.J. Lu
2024-04-03 12:11 ` [PATCH v2 06/10] x86: Do not raise inexact exception on floorl Adhemerval Zanella
2024-04-03 12:11 ` [PATCH v2 07/10] x86: Do not raise inexact exception on truncl Adhemerval Zanella
2024-04-03 12:11 ` [PATCH v2 08/10] x86: Do not raise inexact exception on floor/floorf Adhemerval Zanella
2024-04-03 12:11 ` [PATCH v2 09/10] i386: Do not raise inexact exception on ceil/ceilf Adhemerval Zanella
2024-04-03 12:11 ` [PATCH v2 10/10] i386: Do not raise inexact exception on trunc/truncf Adhemerval Zanella
2024-04-03 15:03 ` [PATCH v2 00/10] Improve rounding to interger function for C23 Joseph Myers
2024-04-03 17:10 ` Adhemerval Zanella Netto
2024-04-04 5:25 ` Paul Zimmermann
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