Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
38 lines
663 B
C
38 lines
663 B
C
// SPDX-License-Identifier: GPL-2.0+
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#include <linux/errno.h>
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#include "test_fpu.h"
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int test_fpu(void)
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{
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/*
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* This sequence of operations tests that rounding mode is
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* to nearest and that denormal numbers are supported.
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* Volatile variables are used to avoid compiler optimizing
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* the calculations away.
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*/
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volatile double a, b, c, d, e, f, g;
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a = 4.0;
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b = 1e-15;
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c = 1e-310;
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/* Sets precision flag */
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d = a + b;
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/* Result depends on rounding mode */
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e = a + b / 2;
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/* Denormal and very large values */
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f = b / c;
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/* Depends on denormal support */
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g = a + c * f;
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if (d > a && e > a && g > a)
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return 0;
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else
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return -EINVAL;
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}
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