91 lines
2.5 KiB
NASM
91 lines
2.5 KiB
NASM
|
dnl Alpha mpn_addmul_1 -- Multiply a limb vector with a limb and add the
|
||
|
|
dnl result to a second limb vector.
|
||
|
|
|
||
|
|
dnl Copyright 1992, 1994, 1995, 2000, 2002 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 EV4: 42
|
||
|
|
C EV5: 18
|
||
|
|
C EV6: 7
|
||
|
|
|
||
|
|
C INPUT PARAMETERS
|
||
|
|
C rp r16
|
||
|
|
C up r17
|
||
|
|
C n r18
|
||
|
|
C vl r19
|
||
|
|
|
||
|
|
|
||
|
|
ASM_START()
|
||
|
|
PROLOGUE(mpn_addmul_1)
|
||
|
|
ldq r2,0(r17) C r2 = s1_limb
|
||
|
|
addq r17,8,r17 C s1_ptr++
|
||
|
|
subq r18,1,r18 C size--
|
||
|
|
mulq r2,r19,r3 C r3 = prod_low
|
||
|
|
ldq r5,0(r16) C r5 = *res_ptr
|
||
|
|
umulh r2,r19,r0 C r0 = prod_high
|
||
|
|
beq r18,$Lend1 C jump if size was == 1
|
||
|
|
ldq r2,0(r17) C r2 = s1_limb
|
||
|
|
addq r17,8,r17 C s1_ptr++
|
||
|
|
subq r18,1,r18 C size--
|
||
|
|
addq r5,r3,r3
|
||
|
|
cmpult r3,r5,r4
|
||
|
|
stq r3,0(r16)
|
||
|
|
addq r16,8,r16 C res_ptr++
|
||
|
|
beq r18,$Lend2 C jump if size was == 2
|
||
|
|
|
||
|
|
ALIGN(8)
|
||
|
|
$Loop: mulq r2,r19,r3 C r3 = prod_low
|
||
|
|
ldq r5,0(r16) C r5 = *res_ptr
|
||
|
|
addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
|
||
|
|
subq r18,1,r18 C size--
|
||
|
|
umulh r2,r19,r4 C r4 = cy_limb
|
||
|
|
ldq r2,0(r17) C r2 = s1_limb
|
||
|
|
addq r17,8,r17 C s1_ptr++
|
||
|
|
addq r3,r0,r3 C r3 = cy_limb + prod_low
|
||
|
|
cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
|
||
|
|
addq r5,r3,r3
|
||
|
|
cmpult r3,r5,r5
|
||
|
|
stq r3,0(r16)
|
||
|
|
addq r16,8,r16 C res_ptr++
|
||
|
|
addq r5,r0,r0 C combine carries
|
||
|
|
bne r18,$Loop
|
||
|
|
|
||
|
|
$Lend2: mulq r2,r19,r3 C r3 = prod_low
|
||
|
|
ldq r5,0(r16) C r5 = *res_ptr
|
||
|
|
addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
|
||
|
|
umulh r2,r19,r4 C r4 = cy_limb
|
||
|
|
addq r3,r0,r3 C r3 = cy_limb + prod_low
|
||
|
|
cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
|
||
|
|
addq r5,r3,r3
|
||
|
|
cmpult r3,r5,r5
|
||
|
|
stq r3,0(r16)
|
||
|
|
addq r5,r0,r0 C combine carries
|
||
|
|
addq r4,r0,r0 C cy_limb = prod_high + cy
|
||
|
|
ret r31,(r26),1
|
||
|
|
$Lend1: addq r5,r3,r3
|
||
|
|
cmpult r3,r5,r5
|
||
|
|
stq r3,0(r16)
|
||
|
|
addq r0,r5,r0
|
||
|
|
ret r31,(r26),1
|
||
|
|
EPILOGUE(mpn_addmul_1)
|
||
|
|
ASM_END()
|