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>
53 lines
974 B
C
53 lines
974 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* IEEE754 floating point arithmetic
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* double precision: CLASS.f
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* FPR[fd] = class(FPR[fs])
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*
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* MIPS floating point support
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* Copyright (C) 2015 Imagination Technologies, Ltd.
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* Author: Markos Chandras <markos.chandras@imgtec.com>
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*/
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#include "ieee754dp.h"
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int ieee754dp_2008class(union ieee754dp x)
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{
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COMPXDP;
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EXPLODEXDP;
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/*
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* 10 bit mask as follows:
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*
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* bit0 = SNAN
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* bit1 = QNAN
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* bit2 = -INF
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* bit3 = -NORM
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* bit4 = -DNORM
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* bit5 = -ZERO
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* bit6 = INF
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* bit7 = NORM
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* bit8 = DNORM
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* bit9 = ZERO
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*/
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switch(xc) {
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case IEEE754_CLASS_SNAN:
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return 0x01;
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case IEEE754_CLASS_QNAN:
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return 0x02;
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case IEEE754_CLASS_INF:
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return 0x04 << (xs ? 0 : 4);
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case IEEE754_CLASS_NORM:
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return 0x08 << (xs ? 0 : 4);
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case IEEE754_CLASS_DNORM:
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return 0x10 << (xs ? 0 : 4);
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case IEEE754_CLASS_ZERO:
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return 0x20 << (xs ? 0 : 4);
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default:
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pr_err("Unknown class: %d\n", xc);
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return 0;
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}
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}
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