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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.
75 lines
1.9 KiB
ArmAsm
75 lines
1.9 KiB
ArmAsm
/* mpn_submul_1 -- multiply and subtract bignums.
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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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@ cycles/limb
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@ StrongArm ?
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@ Cortex-A8 ?
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@ Cortex-A9 ?
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@ Cortex-A15 4
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/* mp_limb_t mpn_submul_1(res_ptr, src1_ptr, size, s2_limb) */
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ENTRY (__mpn_submul_1)
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push { r4, r5, r6, r7 }
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cfi_adjust_cfa_offset (16)
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cfi_rel_offset (r4, 0)
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cfi_rel_offset (r5, 4)
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cfi_rel_offset (r6, 8)
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cfi_rel_offset (r7, 12)
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sfi_breg r1, \
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ldr r6, [\B], #4
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sfi_breg r0, \
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ldr r7, [\B]
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mov r4, #0 /* init carry in */
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b 1f
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0:
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sfi_breg r1, \
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ldr r6, [\B], #4 /* load next ul */
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adds r5, r5, r4 /* (lpl, c) = lpl + cl */
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adc r4, ip, #0 /* cl = hpl + c */
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subs r5, r7, r5 /* (lpl, !c) = rl - lpl */
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sfi_breg r0, \
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ldr r7, [\B, #4] /* load next rl */
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it cc
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addcc r4, r4, #1 /* cl += !c */
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sfi_breg r0, \
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str r5, [\B], #4
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1:
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umull r5, ip, r6, r3 /* (hpl, lpl) = ul * vl */
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subs r2, r2, #1
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bne 0b
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adds r5, r5, r4 /* (lpl, c) = lpl + cl */
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adc r4, ip, #0 /* cl = hpl + c */
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subs r5, r7, r5 /* (lpl, !c) = rl - lpl */
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sfi_breg r0, \
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str r5, [\B], #4
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it cc
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addcc r4, r4, #1 /* cl += !c */
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mov r0, r4 /* return carry */
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pop { r4, r5, r6, r7 }
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DO_RET (lr)
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END (__mpn_submul_1)
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