196 lines
4.8 KiB
NASM
196 lines
4.8 KiB
NASM
dnl x86 mpn_add_n/mpn_sub_n -- mpn addition and subtraction.
|
|
|
|
dnl Copyright 1992, 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free Software
|
|
dnl Foundation, Inc.
|
|
dnl
|
|
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
|
|
dnl modify it under the terms of the GNU Lesser General Public License as
|
|
dnl published by the Free Software Foundation; either version 2.1 of the
|
|
dnl License, or (at your option) any later version.
|
|
dnl
|
|
dnl The GNU MP Library is distributed in the hope that it will be useful,
|
|
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
dnl Lesser General Public License for more details.
|
|
dnl
|
|
dnl You should have received a copy of the GNU Lesser General Public
|
|
dnl License along with the GNU MP Library; see the file COPYING.LIB. If
|
|
dnl not, write to the Free Software Foundation, Inc., 51 Franklin Street,
|
|
dnl Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
include(`../config.m4')
|
|
|
|
|
|
C cycles/limb
|
|
C P5: 3.375
|
|
C P6: 3.125
|
|
C K6: 3.5
|
|
C K7: 2.25
|
|
C P4: 8.75
|
|
|
|
define(`OPERATION_sub_n',1)
|
|
|
|
ifdef(`OPERATION_add_n',`
|
|
define(M4_inst, adcl)
|
|
define(M4_function_n, mpn_add_n)
|
|
define(M4_function_nc, mpn_add_nc)
|
|
|
|
',`ifdef(`OPERATION_sub_n',`
|
|
define(M4_inst, sbbl)
|
|
define(M4_function_n, mpn_sub_n)
|
|
define(M4_function_nc, mpn_sub_nc)
|
|
|
|
',`m4_error(`Need OPERATION_add_n or OPERATION_sub_n
|
|
')')')
|
|
|
|
MULFUNC_PROLOGUE(mpn_sub_n mpn_sub_nc)
|
|
|
|
|
|
C mp_limb_t M4_function_n (mp_ptr dst, mp_srcptr src1, mp_srcptr src2,
|
|
C mp_size_t size);
|
|
C mp_limb_t M4_function_nc (mp_ptr dst, mp_srcptr src1, mp_srcptr src2,
|
|
C mp_size_t size, mp_limb_t carry);
|
|
|
|
defframe(PARAM_CARRY,20)
|
|
defframe(PARAM_SIZE, 16)
|
|
defframe(PARAM_SRC2, 12)
|
|
defframe(PARAM_SRC1, 8)
|
|
defframe(PARAM_DST, 4)
|
|
|
|
TEXT
|
|
ALIGN(8)
|
|
|
|
PROLOGUE(M4_function_nc)
|
|
deflit(`FRAME',0)
|
|
|
|
pushl %edi FRAME_pushl()
|
|
pushl %esi FRAME_pushl()
|
|
|
|
movl PARAM_DST,%edi
|
|
movl PARAM_SRC1,%esi
|
|
movl PARAM_SRC2,%edx
|
|
movl PARAM_SIZE,%ecx
|
|
|
|
movl %ecx,%eax
|
|
shrl $3,%ecx C compute count for unrolled loop
|
|
negl %eax
|
|
andl $7,%eax C get index where to start loop
|
|
jz L(oopgo) C necessary special case for 0
|
|
incl %ecx C adjust loop count
|
|
shll $2,%eax C adjustment for pointers...
|
|
subl %eax,%edi C ... since they are offset ...
|
|
subl %eax,%esi C ... by a constant when we ...
|
|
subl %eax,%edx C ... enter the loop
|
|
shrl $2,%eax C restore previous value
|
|
|
|
ifdef(`PIC',`
|
|
C Calculate start address in loop for PIC. Due to limitations in
|
|
C old gas, LF(M4_function_n,oop)-L(0a)-3 cannot be put into the leal
|
|
call L(0a)
|
|
L(0a): leal (%eax,%eax,8),%eax
|
|
addl (%esp),%eax
|
|
addl $L(oop)-L(0a)-3,%eax
|
|
addl $4,%esp
|
|
',`
|
|
C Calculate start address in loop for non-PIC.
|
|
leal L(oop)-3(%eax,%eax,8),%eax
|
|
')
|
|
|
|
C These lines initialize carry from the 5th parameter. Should be
|
|
C possible to simplify.
|
|
pushl %ebp FRAME_pushl()
|
|
movl PARAM_CARRY,%ebp
|
|
shrl $1,%ebp C shift bit 0 into carry
|
|
popl %ebp FRAME_popl()
|
|
|
|
jmp *%eax C jump into loop
|
|
|
|
EPILOGUE()
|
|
|
|
|
|
ALIGN(16)
|
|
PROLOGUE(M4_function_n)
|
|
deflit(`FRAME',0)
|
|
|
|
pushl %edi FRAME_pushl()
|
|
pushl %esi FRAME_pushl()
|
|
|
|
movl PARAM_DST,%edi
|
|
movl PARAM_SRC1,%esi
|
|
movl PARAM_SRC2,%edx
|
|
movl PARAM_SIZE,%ecx
|
|
|
|
movl %ecx,%eax
|
|
shrl $3,%ecx C compute count for unrolled loop
|
|
negl %eax
|
|
andl $7,%eax C get index where to start loop
|
|
jz L(oop) C necessary special case for 0
|
|
incl %ecx C adjust loop count
|
|
shll $2,%eax C adjustment for pointers...
|
|
subl %eax,%edi C ... since they are offset ...
|
|
subl %eax,%esi C ... by a constant when we ...
|
|
subl %eax,%edx C ... enter the loop
|
|
shrl $2,%eax C restore previous value
|
|
|
|
ifdef(`PIC',`
|
|
C Calculate start address in loop for PIC. Due to limitations in
|
|
C some assemblers, L(oop)-L(0b)-3 cannot be put into the leal
|
|
call L(0b)
|
|
L(0b): leal (%eax,%eax,8),%eax
|
|
addl (%esp),%eax
|
|
addl $L(oop)-L(0b)-3,%eax
|
|
addl $4,%esp
|
|
',`
|
|
C Calculate start address in loop for non-PIC.
|
|
leal L(oop)-3(%eax,%eax,8),%eax
|
|
')
|
|
jmp *%eax C jump into loop
|
|
|
|
L(oopgo):
|
|
pushl %ebp FRAME_pushl()
|
|
movl PARAM_CARRY,%ebp
|
|
shrl $1,%ebp C shift bit 0 into carry
|
|
popl %ebp FRAME_popl()
|
|
|
|
ALIGN(16)
|
|
L(oop): movl (%esi),%eax
|
|
M4_inst (%edx),%eax
|
|
movl %eax,(%edi)
|
|
movl 4(%esi),%eax
|
|
M4_inst 4(%edx),%eax
|
|
movl %eax,4(%edi)
|
|
movl 8(%esi),%eax
|
|
M4_inst 8(%edx),%eax
|
|
movl %eax,8(%edi)
|
|
movl 12(%esi),%eax
|
|
M4_inst 12(%edx),%eax
|
|
movl %eax,12(%edi)
|
|
movl 16(%esi),%eax
|
|
M4_inst 16(%edx),%eax
|
|
movl %eax,16(%edi)
|
|
movl 20(%esi),%eax
|
|
M4_inst 20(%edx),%eax
|
|
movl %eax,20(%edi)
|
|
movl 24(%esi),%eax
|
|
M4_inst 24(%edx),%eax
|
|
movl %eax,24(%edi)
|
|
movl 28(%esi),%eax
|
|
M4_inst 28(%edx),%eax
|
|
movl %eax,28(%edi)
|
|
leal 32(%edi),%edi
|
|
leal 32(%esi),%esi
|
|
leal 32(%edx),%edx
|
|
decl %ecx
|
|
jnz L(oop)
|
|
|
|
sbbl %eax,%eax
|
|
negl %eax
|
|
|
|
popl %esi
|
|
popl %edi
|
|
ret
|
|
|
|
EPILOGUE()
|