mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
04277e02d7
* 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.
238 lines
5.5 KiB
ArmAsm
238 lines
5.5 KiB
ArmAsm
! 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 <http://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)
|