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dnl mpn_mul_1 for Pentium 4 and P6 models with SSE2 (i.e., 9,D,E,F).
dnl Copyright 2005, 2007, 2011 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 P6 model 0-8,10-12 -
C P6 model 9 (Banias) 4.17
C P6 model 13 (Dothan) 4.17
C P4 model 0-1 (Willamette) 4
C P4 model 2 (Northwood) 4
C P4 model 3-4 (Prescott) 4.55
C TODO:
C * Tweak eax/edx offsets in loop as to save some lea's
C * Perhaps software pipeline small-case code
C INPUT PARAMETERS
C rp sp + 4
C up sp + 8
C n sp + 12
C v0 sp + 16
TEXT
ALIGN(16)
PROLOGUE(mpn_mul_1)
pxor %mm6, %mm6
L(ent): mov 4(%esp), %edx
mov 8(%esp), %eax
mov 12(%esp), %ecx
movd 16(%esp), %mm7
cmp $4, %ecx
jnc L(big)
L(lp0): movd (%eax), %mm0
lea 4(%eax), %eax
lea 4(%edx), %edx
pmuludq %mm7, %mm0
paddq %mm0, %mm6
movd %mm6, -4(%edx)
psrlq $32, %mm6
dec %ecx
jnz L(lp0)
movd %mm6, %eax
emms
ret
L(big): and $3, %ecx
je L(0)
cmp $2, %ecx
jc L(1)
je L(2)
jmp L(3) C FIXME: one case should fall through
L(0): movd (%eax), %mm3
sub 12(%esp), %ecx C loop count
lea -16(%eax), %eax
lea -12(%edx), %edx
pmuludq %mm7, %mm3
movd 20(%eax), %mm0
pmuludq %mm7, %mm0
movd 24(%eax), %mm1
jmp L(00)
L(1): movd (%eax), %mm2
sub 12(%esp), %ecx
lea -12(%eax), %eax
lea -8(%edx), %edx
pmuludq %mm7, %mm2
movd 16(%eax), %mm3
pmuludq %mm7, %mm3
movd 20(%eax), %mm0
jmp L(01)
L(2): movd (%eax), %mm1
sub 12(%esp), %ecx
lea -8(%eax), %eax
lea -4(%edx), %edx
pmuludq %mm7, %mm1
movd 12(%eax), %mm2
pmuludq %mm7, %mm2
movd 16(%eax), %mm3
jmp L(10)
L(3): movd (%eax), %mm0
sub 12(%esp), %ecx
lea -4(%eax), %eax
pmuludq %mm7, %mm0
movd 8(%eax), %mm1
pmuludq %mm7, %mm1
movd 12(%eax), %mm2
ALIGN(16)
L(top): pmuludq %mm7, %mm2
paddq %mm0, %mm6
movd 16(%eax), %mm3
movd %mm6, 0(%edx)
psrlq $32, %mm6
L(10): pmuludq %mm7, %mm3
paddq %mm1, %mm6
movd 20(%eax), %mm0
movd %mm6, 4(%edx)
psrlq $32, %mm6
L(01): pmuludq %mm7, %mm0
paddq %mm2, %mm6
movd 24(%eax), %mm1
movd %mm6, 8(%edx)
psrlq $32, %mm6
L(00): pmuludq %mm7, %mm1
paddq %mm3, %mm6
movd 28(%eax), %mm2
movd %mm6, 12(%edx)
psrlq $32, %mm6
lea 16(%eax), %eax
lea 16(%edx), %edx
add $4, %ecx
ja L(top)
L(end): pmuludq %mm7, %mm2
paddq %mm0, %mm6
movd %mm6, 0(%edx)
psrlq $32, %mm6
paddq %mm1, %mm6
movd %mm6, 4(%edx)
psrlq $32, %mm6
paddq %mm2, %mm6
movd %mm6, 8(%edx)
psrlq $32, %mm6
movd %mm6, %eax
emms
ret
EPILOGUE()
PROLOGUE(mpn_mul_1c)
movd 20(%esp), %mm6
jmp L(ent)
EPILOGUE()
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