glibc/sysdeps/alpha/sub_n.S
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

119 lines
2.2 KiB
ArmAsm

# Alpha __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
# store difference in a third limb vector.
# Copyright (C) 1995-2022 Free Software Foundation, Inc.
# This file is part of the GNU MP Library.
# The GNU MP 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 MP 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 MP Library. If not, see <https://www.gnu.org/licenses/>.
# INPUT PARAMETERS
# res_ptr $16
# s1_ptr $17
# s2_ptr $18
# size $19
.set noreorder
.set noat
.text
.align 3
.globl __mpn_sub_n
.ent __mpn_sub_n
__mpn_sub_n:
.frame $30,0,$26,0
ldq $3,0($17)
ldq $4,0($18)
subq $19,1,$19
and $19,4-1,$2 # number of limbs in first loop
bis $31,$31,$0
beq $2,.L0 # if multiple of 4 limbs, skip first loop
subq $19,$2,$19
.Loop0: subq $2,1,$2
ldq $5,8($17)
addq $4,$0,$4
ldq $6,8($18)
cmpult $4,$0,$1
subq $3,$4,$4
cmpult $3,$4,$0
stq $4,0($16)
or $0,$1,$0
addq $17,8,$17
addq $18,8,$18
bis $5,$5,$3
bis $6,$6,$4
addq $16,8,$16
bne $2,.Loop0
.L0: beq $19,.Lend
.align 3
.Loop: subq $19,4,$19
ldq $5,8($17)
addq $4,$0,$4
ldq $6,8($18)
cmpult $4,$0,$1
subq $3,$4,$4
cmpult $3,$4,$0
stq $4,0($16)
or $0,$1,$0
ldq $3,16($17)
addq $6,$0,$6
ldq $4,16($18)
cmpult $6,$0,$1
subq $5,$6,$6
cmpult $5,$6,$0
stq $6,8($16)
or $0,$1,$0
ldq $5,24($17)
addq $4,$0,$4
ldq $6,24($18)
cmpult $4,$0,$1
subq $3,$4,$4
cmpult $3,$4,$0
stq $4,16($16)
or $0,$1,$0
ldq $3,32($17)
addq $6,$0,$6
ldq $4,32($18)
cmpult $6,$0,$1
subq $5,$6,$6
cmpult $5,$6,$0
stq $6,24($16)
or $0,$1,$0
addq $17,32,$17
addq $18,32,$18
addq $16,32,$16
bne $19,.Loop
.Lend: addq $4,$0,$4
cmpult $4,$0,$1
subq $3,$4,$4
cmpult $3,$4,$0
stq $4,0($16)
or $0,$1,$0
ret $31,($26),1
.end __mpn_sub_n