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9bfe7553fa
Commit fb8722735f ("arm64: support __int128 on gcc 5+") added support
for the __int128 data type, but this breaks the build in some configurations
where GCC ends up emitting calls to the __lshrti3 helper in libgcc, which
results in a link error:
kernel/sched/fair.o: In function `__calc_delta':
fair.c:(.text+0xca0): undefined reference to `__lshrti3'
kernel/time/timekeeping.o: In function `timekeeping_resume':
timekeeping.c:(.text+0x3f60): undefined reference to `__lshrti3'
make: *** [vmlinux] Error 1
Fix the build by providing an implementation of __lshrti3, like we do
already for __ashlti3 and __ashrti3.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
81 lines
1.4 KiB
ArmAsm
81 lines
1.4 KiB
ArmAsm
/*
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* Copyright (C) 2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/linkage.h>
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ENTRY(__ashlti3)
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cbz x2, 1f
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mov x3, #64
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sub x3, x3, x2
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cmp x3, #0
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b.le 2f
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lsl x1, x1, x2
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lsr x3, x0, x3
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lsl x2, x0, x2
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orr x1, x1, x3
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mov x0, x2
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1:
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ret
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2:
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neg w1, w3
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mov x2, #0
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lsl x1, x0, x1
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mov x0, x2
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ret
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ENDPROC(__ashlti3)
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ENTRY(__ashrti3)
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cbz x2, 3f
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mov x3, #64
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sub x3, x3, x2
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cmp x3, #0
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b.le 4f
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lsr x0, x0, x2
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lsl x3, x1, x3
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asr x2, x1, x2
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orr x0, x0, x3
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mov x1, x2
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3:
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ret
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4:
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neg w0, w3
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asr x2, x1, #63
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asr x0, x1, x0
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mov x1, x2
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ret
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ENDPROC(__ashrti3)
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ENTRY(__lshrti3)
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cbz x2, 1f
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mov x3, #64
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sub x3, x3, x2
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cmp x3, #0
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b.le 2f
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lsr x0, x0, x2
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lsl x3, x1, x3
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lsr x2, x1, x2
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orr x0, x0, x3
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mov x1, x2
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1:
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ret
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2:
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neg w0, w3
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mov x2, #0
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lsr x0, x1, x0
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mov x1, x2
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ret
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ENDPROC(__lshrti3)
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