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glibc/sysdeps/sparc/sparc32/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

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! SPARC __mpn_add_n -- Add two limb vectors of the same length > 0 and store
! sum in a third limb vector.
!
! Copyright (C) 1995-2019 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/>.
! INPUT PARAMETERS
#define RES_PTR %o0
#define S1_PTR %o1
#define S2_PTR %o2
#define SIZE %o3
#include <sysdep.h>
ENTRY(__mpn_add_n)
xor S2_PTR,RES_PTR,%g1
andcc %g1,4,%g0
bne LOC(1) ! branch if alignment differs
nop
! ** V1a **
LOC(0): andcc RES_PTR,4,%g0 ! RES_PTR unaligned? Side effect: cy=0
be LOC(v1) ! if no, branch
nop
/* Add least significant limb separately to align RES_PTR and S2_PTR */
ld [S1_PTR],%g4
add S1_PTR,4,S1_PTR
ld [S2_PTR],%g2
add S2_PTR,4,S2_PTR
add SIZE,-1,SIZE
addcc %g4,%g2,%o4
st %o4,[RES_PTR]
add RES_PTR,4,RES_PTR
LOC(v1):
addx %g0,%g0,%o4 ! save cy in register
cmp SIZE,2 ! if SIZE < 2 ...
bl LOC(end2) ! ... branch to tail code
subcc %g0,%o4,%g0 ! restore cy
ld [S1_PTR+0],%g4
addcc SIZE,-10,SIZE
ld [S1_PTR+4],%g1
ldd [S2_PTR+0],%g2
blt LOC(fin1)
subcc %g0,%o4,%g0 ! restore cy
/* Add blocks of 8 limbs until less than 8 limbs remain */
LOC(loop1):
addxcc %g4,%g2,%o4
ld [S1_PTR+8],%g4
addxcc %g1,%g3,%o5
ld [S1_PTR+12],%g1
ldd [S2_PTR+8],%g2
std %o4,[RES_PTR+0]
addxcc %g4,%g2,%o4
ld [S1_PTR+16],%g4
addxcc %g1,%g3,%o5
ld [S1_PTR+20],%g1
ldd [S2_PTR+16],%g2
std %o4,[RES_PTR+8]
addxcc %g4,%g2,%o4
ld [S1_PTR+24],%g4
addxcc %g1,%g3,%o5
ld [S1_PTR+28],%g1
ldd [S2_PTR+24],%g2
std %o4,[RES_PTR+16]
addxcc %g4,%g2,%o4
ld [S1_PTR+32],%g4
addxcc %g1,%g3,%o5
ld [S1_PTR+36],%g1
ldd [S2_PTR+32],%g2
std %o4,[RES_PTR+24]
addx %g0,%g0,%o4 ! save cy in register
addcc SIZE,-8,SIZE
add S1_PTR,32,S1_PTR
add S2_PTR,32,S2_PTR
add RES_PTR,32,RES_PTR
bge LOC(loop1)
subcc %g0,%o4,%g0 ! restore cy
LOC(fin1):
addcc SIZE,8-2,SIZE
blt LOC(end1)
subcc %g0,%o4,%g0 ! restore cy
/* Add blocks of 2 limbs until less than 2 limbs remain */
LOC(loope1):
addxcc %g4,%g2,%o4
ld [S1_PTR+8],%g4
addxcc %g1,%g3,%o5
ld [S1_PTR+12],%g1
ldd [S2_PTR+8],%g2
std %o4,[RES_PTR+0]
addx %g0,%g0,%o4 ! save cy in register
addcc SIZE,-2,SIZE
add S1_PTR,8,S1_PTR
add S2_PTR,8,S2_PTR
add RES_PTR,8,RES_PTR
bge LOC(loope1)
subcc %g0,%o4,%g0 ! restore cy
LOC(end1):
addxcc %g4,%g2,%o4
addxcc %g1,%g3,%o5
std %o4,[RES_PTR+0]
addx %g0,%g0,%o4 ! save cy in register
andcc SIZE,1,%g0
be LOC(ret1)
subcc %g0,%o4,%g0 ! restore cy
/* Add last limb */
ld [S1_PTR+8],%g4
ld [S2_PTR+8],%g2
addxcc %g4,%g2,%o4
st %o4,[RES_PTR+8]
LOC(ret1):
retl
addx %g0,%g0,%o0 ! return carry-out from most sign. limb
LOC(1): xor S1_PTR,RES_PTR,%g1
andcc %g1,4,%g0
bne LOC(2)
nop
! ** V1b **
mov S2_PTR,%g1
mov S1_PTR,S2_PTR
b LOC(0)
mov %g1,S1_PTR
! ** V2 **
/* If we come here, the alignment of S1_PTR and RES_PTR as well as the
alignment of S2_PTR and RES_PTR differ. Since there are only two ways
things can be aligned (that we care about) we now know that the alignment
of S1_PTR and S2_PTR are the same. */
LOC(2): cmp SIZE,1
be LOC(jone)
nop
andcc S1_PTR,4,%g0 ! S1_PTR unaligned? Side effect: cy=0
be LOC(v2) ! if no, branch
nop
/* Add least significant limb separately to align S1_PTR and S2_PTR */
ld [S1_PTR],%g4
add S1_PTR,4,S1_PTR
ld [S2_PTR],%g2
add S2_PTR,4,S2_PTR
add SIZE,-1,SIZE
addcc %g4,%g2,%o4
st %o4,[RES_PTR]
add RES_PTR,4,RES_PTR
LOC(v2):
addx %g0,%g0,%o4 ! save cy in register
addcc SIZE,-8,SIZE
blt LOC(fin2)
subcc %g0,%o4,%g0 ! restore cy
/* Add blocks of 8 limbs until less than 8 limbs remain */
LOC(loop2):
ldd [S1_PTR+0],%g2
ldd [S2_PTR+0],%o4
addxcc %g2,%o4,%g2
st %g2,[RES_PTR+0]
addxcc %g3,%o5,%g3
st %g3,[RES_PTR+4]
ldd [S1_PTR+8],%g2
ldd [S2_PTR+8],%o4
addxcc %g2,%o4,%g2
st %g2,[RES_PTR+8]
addxcc %g3,%o5,%g3
st %g3,[RES_PTR+12]
ldd [S1_PTR+16],%g2
ldd [S2_PTR+16],%o4
addxcc %g2,%o4,%g2
st %g2,[RES_PTR+16]
addxcc %g3,%o5,%g3
st %g3,[RES_PTR+20]
ldd [S1_PTR+24],%g2
ldd [S2_PTR+24],%o4
addxcc %g2,%o4,%g2
st %g2,[RES_PTR+24]
addxcc %g3,%o5,%g3
st %g3,[RES_PTR+28]
addx %g0,%g0,%o4 ! save cy in register
addcc SIZE,-8,SIZE
add S1_PTR,32,S1_PTR
add S2_PTR,32,S2_PTR
add RES_PTR,32,RES_PTR
bge LOC(loop2)
subcc %g0,%o4,%g0 ! restore cy
LOC(fin2):
addcc SIZE,8-2,SIZE
blt LOC(end2)
subcc %g0,%o4,%g0 ! restore cy
LOC(loope2):
ldd [S1_PTR+0],%g2
ldd [S2_PTR+0],%o4
addxcc %g2,%o4,%g2
st %g2,[RES_PTR+0]
addxcc %g3,%o5,%g3
st %g3,[RES_PTR+4]
addx %g0,%g0,%o4 ! save cy in register
addcc SIZE,-2,SIZE
add S1_PTR,8,S1_PTR
add S2_PTR,8,S2_PTR
add RES_PTR,8,RES_PTR
bge LOC(loope2)
subcc %g0,%o4,%g0 ! restore cy
LOC(end2):
andcc SIZE,1,%g0
be LOC(ret2)
subcc %g0,%o4,%g0 ! restore cy
/* Add last limb */
LOC(jone):
ld [S1_PTR],%g4
ld [S2_PTR],%g2
addxcc %g4,%g2,%o4
st %o4,[RES_PTR]
LOC(ret2):
retl
addx %g0,%g0,%o0 ! return carry-out from most sign. limb
END(__mpn_add_n)
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