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>
37 lines
709 B
ArmAsm
37 lines
709 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/export.h>
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#include <linux/linkage.h>
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.text
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ENTRY(ip_fast_csum) /* %o0 = iph, %o1 = ihl */
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sub %o1, 4, %g7
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lduw [%o0 + 0x00], %o2
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lduw [%o0 + 0x04], %g2
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lduw [%o0 + 0x08], %g3
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addcc %g2, %o2, %o2
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lduw [%o0 + 0x0c], %g2
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addccc %g3, %o2, %o2
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lduw [%o0 + 0x10], %g3
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addccc %g2, %o2, %o2
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addc %o2, %g0, %o2
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1: addcc %g3, %o2, %o2
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add %o0, 4, %o0
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addccc %o2, %g0, %o2
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subcc %g7, 1, %g7
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be,a,pt %icc, 2f
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sll %o2, 16, %g2
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lduw [%o0 + 0x10], %g3
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ba,pt %xcc, 1b
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nop
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2: addcc %o2, %g2, %g2
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srl %g2, 16, %o2
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addc %o2, %g0, %o2
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xnor %g0, %o2, %o2
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set 0xffff, %o1
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retl
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and %o2, %o1, %o0
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ENDPROC(ip_fast_csum)
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EXPORT_SYMBOL(ip_fast_csum)
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