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c6bfe5c4d7
I've moved the ARM port from ports to the main sysdeps hierarchy. Beyond the README update, the move of the files was simply git mv ports/sysdeps/arm sysdeps/arm git mv ports/sysdeps/unix/arm sysdeps/unix/arm git mv ports/sysdeps/unix/sysv/linux/arm sysdeps/unix/sysv/linux/arm and in addition to the ChangeLog entries here, I put a note at the top of ports/ChangeLog.arm similar to that at the top of ChangeLog.powerpc. There is deliberately no NEWS change, as I think it makes the most sense to put in a general note above all ports having moved if we can achieve that for 2.20. Tested that disassembly of installed shared libraries for arm is the same before and after this patch, except for data (not instructions) in ld.so (there are assertions in sysdeps/arm/dl-machine.h, and the path by which that file is found, and so by which it appears in the assertion message, changes as a result of the move). * sysdeps/arm: Move directory from ports/sysdeps/arm. * sysdeps/unix/arm: Move directory from ports/sysdeps/unix/arm. * sysdeps/unix/sysv/linux/arm: Move directory from ports/sysdeps/unix/sysv/linux/arm. * README: Update listing for arm-*-linux-gnueabi. ports/ChangeLog.arm: * sysdeps/arm: Move directory to ../sysdeps/arm. * sysdeps/unix/arm: Move directory to ../sysdeps.arm. * sysdeps/unix/sysv/linux/arm: Move directory to ../sysdeps/unix/sysv/linux/arm.
51 lines
1.4 KiB
ArmAsm
51 lines
1.4 KiB
ArmAsm
/* ffsll -- find first set bit in a long long, from least significant end.
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Copyright (C) 2013-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.syntax unified
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.text
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ENTRY (ffsll)
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@ If low part is 0, operate on the high part. Ensure that the
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@ word on which we operate is in r0. Set r2 to the bit offset
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@ of the word being considered. Set the flags for the word
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@ being operated on.
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#ifdef __ARMEL__
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cmp r0, #0
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itee ne
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movne r2, #0
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moveq r2, #32
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movseq r0, r1
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#else
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cmp r1, #0
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ittee ne
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movne r2, #0
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movne r0, r1
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moveq r2, #32
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cmpeq r0, #0
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#endif
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@ Perform the ffs on r0.
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rbit r0, r0
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ittt ne
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clzne r0, r0
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addne r2, r2, #1
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addne r0, r0, r2
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bx lr
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END (ffsll)
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