110 lines
2.4 KiB
NASM
110 lines
2.4 KiB
NASM
dnl ARM mpn_submul_1 -- Multiply a limb vector with a limb and subtract the
|
|
dnl result from a second limb vector.
|
|
|
|
dnl Copyright 1998, 2000, 2001, 2003 Free Software Foundation, Inc.
|
|
|
|
dnl This file is part of the GNU MP Library.
|
|
|
|
dnl The GNU MP Library is free software; you can redistribute it and/or modify
|
|
dnl it under the terms of the GNU Lesser General Public License as published
|
|
dnl by the Free Software Foundation; either version 2.1 of the License, or (at
|
|
dnl your option) any later version.
|
|
|
|
dnl The GNU MP Library is distributed in the hope that it will be useful, but
|
|
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
dnl License for more details.
|
|
|
|
dnl You should have received a copy of the GNU Lesser General Public License
|
|
dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write
|
|
dnl to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
dnl Boston, MA 02110-1301, USA.
|
|
|
|
include(`../config.m4')
|
|
|
|
C cycles/limb
|
|
C StrongARM: 7.75-9.75 (dependent on vl value)
|
|
C XScale: 8-9 (dependent on vl value, estimated)
|
|
|
|
define(`rp',`r0')
|
|
define(`up',`r1')
|
|
define(`n',`r2')
|
|
define(`vl',`r3')
|
|
define(`rl',`r12')
|
|
define(`ul',`r6')
|
|
define(`r',`lr')
|
|
|
|
|
|
ASM_START()
|
|
PROLOGUE(mpn_submul_1)
|
|
stmfd sp!, { r4-r6, lr }
|
|
subs r4, r0, r0 C clear r4, set cy
|
|
tst n, #1
|
|
beq L(skip1)
|
|
ldr ul, [up], #4
|
|
ldr rl, [rp, #0]
|
|
umull r5, r4, ul, vl
|
|
subs r, rl, r5
|
|
str r, [rp], #4
|
|
L(skip1):
|
|
tst n, #2
|
|
beq L(skip2)
|
|
ldr ul, [up], #4
|
|
ldr rl, [rp, #0]
|
|
mov r5, #0
|
|
umlal r4, r5, ul, vl
|
|
ldr ul, [up], #4
|
|
sbcs r, rl, r4
|
|
ldr rl, [rp, #4]
|
|
mov r4, #0
|
|
umlal r5, r4, ul, vl
|
|
str r, [rp], #4
|
|
sbcs r, rl, r5
|
|
str r, [rp], #4
|
|
L(skip2):
|
|
bics r, n, #3
|
|
beq L(return)
|
|
|
|
ldr ul, [up], #4
|
|
ldr rl, [rp, #0]
|
|
mov r5, #0
|
|
umlal r4, r5, ul, vl
|
|
b L(in)
|
|
|
|
L(loop):
|
|
ldr ul, [up], #4
|
|
sbcs r, rl, r5
|
|
ldr rl, [rp, #4]
|
|
mov r5, #0
|
|
umlal r4, r5, ul, vl
|
|
str r, [rp], #4
|
|
L(in): ldr ul, [up], #4
|
|
sbcs r, rl, r4
|
|
ldr rl, [rp, #4]
|
|
mov r4, #0
|
|
umlal r5, r4, ul, vl
|
|
str r, [rp], #4
|
|
ldr ul, [up], #4
|
|
sbcs r, rl, r5
|
|
ldr rl, [rp, #4]
|
|
mov r5, #0
|
|
umlal r4, r5, ul, vl
|
|
str r, [rp], #4
|
|
ldr ul, [up], #4
|
|
sbcs r, rl, r4
|
|
ldr rl, [rp, #4]
|
|
mov r4, #0
|
|
umlal r5, r4, ul, vl
|
|
str r, [rp], #4
|
|
sub n, n, #4
|
|
bics r, n, #3
|
|
bne L(loop)
|
|
|
|
sbcs r, rl, r5
|
|
str r, [rp], #4
|
|
L(return):
|
|
sbc r0, r0, r0
|
|
sub r0, r4, r0
|
|
ldmfd sp!, { r4-r6, pc }
|
|
EPILOGUE(mpn_submul_1)
|