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dnl AMD K7 mpn_addmul_1/mpn_submul_1 -- add or subtract mpn multiple.
dnl Copyright 1999-2002, 2005, 2008 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 P5
C P6 model 0-8,10-12
C P6 model 9 (Banias) 6.5
C P6 model 13 (Dothan)
C P4 model 0 (Willamette)
C P4 model 1 (?)
C P4 model 2 (Northwood)
C P4 model 3 (Prescott)
C P4 model 4 (Nocona)
C AMD K6
C AMD K7 3.75
C AMD K8
C TODO
C * Improve feed-in and wind-down code. We beat the old code for all n != 1,
C but lose by 2x for n == 1.
ifdef(`OPERATION_addmul_1',`
define(`ADDSUB', `add')
define(`func', `mpn_addmul_1')
')
ifdef(`OPERATION_submul_1',`
define(`ADDSUB', `sub')
define(`func', `mpn_submul_1')
')
MULFUNC_PROLOGUE(mpn_addmul_1 mpn_submul_1)
ASM_START()
TEXT
ALIGN(16)
PROLOGUE(func)
add $-16, %esp
mov %ebp, (%esp)
mov %ebx, 4(%esp)
mov %esi, 8(%esp)
mov %edi, 12(%esp)
mov 20(%esp), %edi
mov 24(%esp), %esi
mov 28(%esp), %eax
mov 32(%esp), %ecx
mov %eax, %ebx
shr $2, %eax
mov %eax, 28(%esp)
mov (%esi), %eax
and $3, %ebx
jz L(b0)
cmp $2, %ebx
jz L(b2)
jg L(b3)
L(b1): lea -4(%esi), %esi
lea -4(%edi), %edi
mul %ecx
mov %eax, %ebx
mov %edx, %ebp
cmpl $0, 28(%esp)
jz L(cj1)
mov 8(%esi), %eax
jmp L(1)
L(b2): mul %ecx
mov %eax, %ebp
mov 4(%esi), %eax
mov %edx, %ebx
cmpl $0, 28(%esp)
jne L(2)
jmp L(cj2)
L(b3): lea -12(%esi), %esi
lea -12(%edi), %edi
mul %ecx
mov %eax, %ebx
mov %edx, %ebp
mov 16(%esi), %eax
incl 28(%esp)
jmp L(3)
L(b0): lea -8(%esi), %esi
lea -8(%edi), %edi
mul %ecx
mov %eax, %ebp
mov 12(%esi), %eax
mov %edx, %ebx
jmp L(0)
ALIGN(16)
L(top): lea 16(%edi), %edi
L(2): mul %ecx
ADDSUB %ebp, 0(%edi)
mov $0, %ebp
adc %eax, %ebx
mov 8(%esi), %eax
adc %edx, %ebp
L(1): mul %ecx
ADDSUB %ebx, 4(%edi)
mov $0, %ebx
adc %eax, %ebp
mov 12(%esi), %eax
adc %edx, %ebx
L(0): mul %ecx
ADDSUB %ebp, 8(%edi)
mov $0, %ebp
adc %eax, %ebx
adc %edx, %ebp
mov 16(%esi), %eax
L(3): mul %ecx
ADDSUB %ebx, 12(%edi)
adc %eax, %ebp
mov 20(%esi), %eax
lea 16(%esi), %esi
mov $0, %ebx
adc %edx, %ebx
decl 28(%esp)
jnz L(top)
L(end): lea 16(%edi), %edi
L(cj2): mul %ecx
ADDSUB %ebp, (%edi)
adc %eax, %ebx
adc $0, %edx
L(cj1): ADDSUB %ebx, 4(%edi)
adc $0, %edx
mov %edx, %eax
mov (%esp), %ebp
mov 4(%esp), %ebx
mov 8(%esp), %esi
mov 12(%esp), %edi
add $16, %esp
ret
EPILOGUE()
ASM_END()
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