dnl
Alpha mpn_mul_1 -- Multiply a limb vector with a limb
and store
dnl the result in 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
dnl The GNU MP Library is free software
; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General
Public License as published by the Free
dnl Software Foundation
; either version 3 of the License, or (at your
dnl
option) any later
version.
dnl
dnl
or
dnl
dnl * the GNU General
Public License as published by the Free Software
dnl Foundation
; either version 2 of the License, or (at your option) any
dnl later
version.
dnl
dnl
or both in parallel, as here.
dnl
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 General
Public License
dnl
for more details.
dnl
dnl You should have received copies of the GNU General
Public License
and the
dnl GNU Lesser General
Public License along with the GNU MP Library.
If not,
dnl see
https://www.gnu.org/licenses/.
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
C cl r20
ASM_START()
PROLOGUE(mpn_mul_1c)
ldq r2,0(r17) C r2 = s1_limb
lda r18,-1(r18) C size--
mulq r2,r19,r3 C r3 = prod_low
umulh r2,r19,r4 C r4 = prod_high
beq r18,$Le1c C jump
if size was == 1
ldq r2,8(r17) C r2 = s1_limb
lda r18,-1(r18) C size--
addq r3,r20,r3 C r3 = cy_limb + cl
stq r3,0(r16)
cmpult r3,r20,r0 C r0 =
carry from (cy_limb + cl)
bne r18,$Loop C jump
if size was == 2
br r31,$Le2
$Le1c: addq r3,r20,r3 C r3 = cy_limb + cl
cmpult r3,r20,r0 C r0 =
carry from (cy_limb + cl)
$Le1: stq r3,0(r16)
addq r4,r0,r0
ret r31,(r26),1
EPILOGUE(mpn_mul_1c)
PROLOGUE(mpn_mul_1)
ldq r2,0(r17) C r2 = s1_limb
lda r18,-1(r18) C size--
mulq r2,r19,r3 C r3 = prod_low
bic r31,r31,r0 C clear cy_limb
umulh r2,r19,r4 C r4 = prod_high
beq r18,$Le1 C jump
if size was == 1
ldq r2,8(r17) C r2 = s1_limb
lda r18,-1(r18) C size--
stq r3,0(r16)
beq r18,$Le2 C jump
if size was == 2
ALIGN(8)
$Loop: mulq r2,r19,r3 C r3 = prod_low
addq r4,r0,r0 C cy_limb = cy_limb +
'cy'
lda r18,-1(r18) C size--
umulh r2,r19,r4 C r4 = prod_high
ldq r2,16(r17) C r2 = s1_limb
lda r17,8(r17) C s1_ptr++
addq r3,r0,r3 C r3 = cy_limb + prod_low
stq r3,8(r16)
cmpult r3,r0,r0 C r0 =
carry from (cy_limb + prod_low)
lda r16,8(r16) C res_ptr++
bne r18,$Loop
$Le2: mulq r2,r19,r3 C r3 = prod_low
addq r4,r0,r0 C cy_limb = cy_limb +
'cy'
umulh r2,r19,r4 C r4 = prod_high
addq r3,r0,r3 C r3 = cy_limb + prod_low
cmpult r3,r0,r0 C r0 =
carry from (cy_limb + prod_low)
stq r3,8(r16)
addq r4,r0,r0 C cy_limb = prod_high + cy
ret r31,(r26),1
EPILOGUE(mpn_mul_1)
ASM_END()
