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dnl Intel Pentium mpn_add_n/mpn_sub_n -- mpn addition and subtraction.
dnl
dnl P5: 2.375 cycles/limb
dnl Copyright (C) 1992, 1994, 1995, 1996, 1999, 2000 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., 59 Temple Place -
dnl Suite 330, Boston, MA 02111-1307, USA.
include(`../config.m4')
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_add_n mpn_add_nc 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)
pushl %edi
pushl %esi
pushl %ebx
pushl %ebp
deflit(`FRAME',16)
movl PARAM_DST,%edi
movl PARAM_SRC1,%esi
movl PARAM_SRC2,%ebp
movl PARAM_SIZE,%ecx
movl (%ebp),%ebx
decl %ecx
movl %ecx,%edx
shrl $3,%ecx
andl $7,%edx
testl %ecx,%ecx C zero carry flag
jz L(endgo)
pushl %edx
FRAME_pushl()
movl PARAM_CARRY,%eax
shrl $1,%eax C shift bit 0 into carry
jmp LF(M4_function_n,oop)
L(endgo):
deflit(`FRAME',16)
movl PARAM_CARRY,%eax
shrl $1,%eax C shift bit 0 into carry
jmp LF(M4_function_n,end)
EPILOGUE()
ALIGN(8)
PROLOGUE(M4_function_n)
pushl %edi
pushl %esi
pushl %ebx
pushl %ebp
deflit(`FRAME',16)
movl PARAM_DST,%edi
movl PARAM_SRC1,%esi
movl PARAM_SRC2,%ebp
movl PARAM_SIZE,%ecx
movl (%ebp),%ebx
decl %ecx
movl %ecx,%edx
shrl $3,%ecx
andl $7,%edx
testl %ecx,%ecx C zero carry flag
jz L(end)
pushl %edx
FRAME_pushl()
ALIGN(8)
L(oop): movl 28(%edi),%eax C fetch destination cache line
leal 32(%edi),%edi
L(1): movl (%esi),%eax
movl 4(%esi),%edx
M4_inst %ebx,%eax
movl 4(%ebp),%ebx
M4_inst %ebx,%edx
movl 8(%ebp),%ebx
movl %eax,-32(%edi)
movl %edx,-28(%edi)
L(2): movl 8(%esi),%eax
movl 12(%esi),%edx
M4_inst %ebx,%eax
movl 12(%ebp),%ebx
M4_inst %ebx,%edx
movl 16(%ebp),%ebx
movl %eax,-24(%edi)
movl %edx,-20(%edi)
L(3): movl 16(%esi),%eax
movl 20(%esi),%edx
M4_inst %ebx,%eax
movl 20(%ebp),%ebx
M4_inst %ebx,%edx
movl 24(%ebp),%ebx
movl %eax,-16(%edi)
movl %edx,-12(%edi)
L(4): movl 24(%esi),%eax
movl 28(%esi),%edx
M4_inst %ebx,%eax
movl 28(%ebp),%ebx
M4_inst %ebx,%edx
movl 32(%ebp),%ebx
movl %eax,-8(%edi)
movl %edx,-4(%edi)
leal 32(%esi),%esi
leal 32(%ebp),%ebp
decl %ecx
jnz L(oop)
popl %edx
FRAME_popl()
L(end):
decl %edx C test %edx w/o clobbering carry
js L(end2)
incl %edx
L(oop2):
leal 4(%edi),%edi
movl (%esi),%eax
M4_inst %ebx,%eax
movl 4(%ebp),%ebx
movl %eax,-4(%edi)
leal 4(%esi),%esi
leal 4(%ebp),%ebp
decl %edx
jnz L(oop2)
L(end2):
movl (%esi),%eax
M4_inst %ebx,%eax
movl %eax,(%edi)
sbbl %eax,%eax
negl %eax
popl %ebp
popl %ebx
popl %esi
popl %edi
ret
EPILOGUE()
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