mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 10:22:41 +08:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
68 lines
1.8 KiB
ArmAsm
68 lines
1.8 KiB
ArmAsm
/* mpn_addmul_1 -- multiply and accumulate bignums.
|
|
Copyright (C) 2013-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
.syntax unified
|
|
.text
|
|
|
|
@ cycles/limb
|
|
@ StrongArm ?
|
|
@ Cortex-A8 ?
|
|
@ Cortex-A9 ?
|
|
@ Cortex-A15 4
|
|
|
|
/* mp_limb_t mpn_addmul_1(res_ptr, src1_ptr, size, s2_limb) */
|
|
|
|
ENTRY (__mpn_addmul_1)
|
|
push { r4, r5, r6, r7 }
|
|
cfi_adjust_cfa_offset (16)
|
|
cfi_rel_offset (r4, 0)
|
|
cfi_rel_offset (r5, 4)
|
|
cfi_rel_offset (r6, 8)
|
|
cfi_rel_offset (r7, 12)
|
|
|
|
ldr r6, [r1], #4
|
|
ldr r5, [r0]
|
|
mov r4, #0 /* init carry in */
|
|
b 1f
|
|
0:
|
|
ldr r6, [r1], #4 /* load next ul */
|
|
adds r7, r4, r5 /* (out, c) = cl + lpl */
|
|
ldr r5, [r0, #4] /* load next rl */
|
|
adc r4, ip, #0 /* cl = hpl + c */
|
|
str r7, [r0], #4
|
|
1:
|
|
mov ip, #0 /* zero-extend rl */
|
|
umlal r5, ip, r6, r3 /* (hpl, lpl) = ul * vl + rl */
|
|
subs r2, r2, #1
|
|
bne 0b
|
|
|
|
adds r4, r4, r5 /* (out, c) = cl + llpl */
|
|
str r4, [r0]
|
|
adc r0, ip, #0 /* return hpl + c */
|
|
|
|
pop { r4, r5, r6, r7 }
|
|
cfi_adjust_cfa_offset (-16)
|
|
cfi_restore (r4)
|
|
cfi_restore (r5)
|
|
cfi_restore (r6)
|
|
cfi_restore (r7)
|
|
DO_RET (lr)
|
|
END (__mpn_addmul_1)
|