glibc/sysdeps/x86_64/add_n.S
Paul Eggert 5a82c74822 Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:

sed -ri '
  s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
  s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
  $(find $(git ls-files) -prune -type f \
      ! -name '*.po' \
      ! -name 'ChangeLog*' \
      ! -path COPYING ! -path COPYING.LIB \
      ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
      ! -path manual/texinfo.tex ! -path scripts/config.guess \
      ! -path scripts/config.sub ! -path scripts/install-sh \
      ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
      ! -path INSTALL ! -path  locale/programs/charmap-kw.h \
      ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
      ! '(' -name configure \
            -execdir test -f configure.ac -o -f configure.in ';' ')' \
      ! '(' -name preconfigure \
            -execdir test -f preconfigure.ac ';' ')' \
      -print)

and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:

  chmod a+x sysdeps/unix/sysv/linux/riscv/configure
  # Omit irrelevant whitespace and comment-only changes,
  # perhaps from a slightly-different Autoconf version.
  git checkout -f \
    sysdeps/csky/configure \
    sysdeps/hppa/configure \
    sysdeps/riscv/configure \
    sysdeps/unix/sysv/linux/csky/configure
  # Omit changes that caused a pre-commit check to fail like this:
  # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
  git checkout -f \
    sysdeps/powerpc/powerpc64/ppc-mcount.S \
    sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
  # Omit change that caused a pre-commit check to fail like this:
  # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
  git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 02:43:31 -07:00

101 lines
2.1 KiB
ArmAsm

/* x86-64 __mpn_add_n -- Add two limb vectors of the same length > 0 and store
sum in a third limb vector.
Copyright (C) 2006-2019 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; see the file COPYING.LIB. If not,
see <https://www.gnu.org/licenses/>. */
#include "sysdep.h"
#include "asm-syntax.h"
#define rp %rdi
#define up %rsi
#define vp %rdx
#define n %rcx
#define cy %r8
#ifndef func
# define func __mpn_add_n
# define ADCSBB adc
#endif
.text
ENTRY (func)
xor %r8, %r8
mov (up), %r10
mov (vp), %r11
lea -8(up,n,8), up
lea -8(vp,n,8), vp
lea -16(rp,n,8), rp
mov %ecx, %eax
neg n
and $3, %eax
je L(b00)
add %rax, n /* clear low rcx bits for jrcxz */
cmp $2, %eax
jl L(b01)
je L(b10)
L(b11): shr %r8 /* set cy */
jmp L(e11)
L(b00): shr %r8 /* set cy */
mov %r10, %r8
mov %r11, %r9
lea 4(n), n
jmp L(e00)
L(b01): shr %r8 /* set cy */
jmp L(e01)
L(b10): shr %r8 /* set cy */
mov %r10, %r8
mov %r11, %r9
jmp L(e10)
L(end): ADCSBB %r11, %r10
mov %r10, 8(rp)
mov %ecx, %eax /* clear eax, ecx contains 0 */
adc %eax, %eax
ret
.p2align 4
L(top):
mov -24(up,n,8), %r8
mov -24(vp,n,8), %r9
ADCSBB %r11, %r10
mov %r10, -24(rp,n,8)
L(e00):
mov -16(up,n,8), %r10
mov -16(vp,n,8), %r11
ADCSBB %r9, %r8
mov %r8, -16(rp,n,8)
L(e11):
mov -8(up,n,8), %r8
mov -8(vp,n,8), %r9
ADCSBB %r11, %r10
mov %r10, -8(rp,n,8)
L(e10):
mov (up,n,8), %r10
mov (vp,n,8), %r11
ADCSBB %r9, %r8
mov %r8, (rp,n,8)
L(e01):
jrcxz L(end)
lea 4(n), n
jmp L(top)
END (func)