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dnl AMD K6-2 mpn_and_n, mpn_andn_n, mpn_nand_n, mpn_ior_n, mpn_iorn_n,
dnl mpn_nior_n, mpn_xor_n, mpn_xnor_n -- mpn bitwise logical operations.
dnl
dnl alignment dst/src1/src2, A=0mod8, N=4mod8
dnl A/A/A A/A/N A/N/A A/N/N N/A/A N/A/N N/N/A N/N/N
dnl
dnl K6-2 1.2 1.5 1.5 1.2 1.2 1.5 1.5 1.2 and,andn,ior,xor
dnl K6-2 1.5 1.75 2.0 1.75 1.75 2.0 1.75 1.5 iorn,xnor
dnl K6-2 1.75 2.0 2.0 2.0 2.0 2.0 2.0 1.75 nand,nior
dnl
dnl K6 1.5 1.68 1.75 1.2 1.75 1.75 1.68 1.5 and,andn,ior,xor
dnl K6 2.0 2.0 2.25 2.25 2.25 2.25 2.0 2.0 iorn,xnor
dnl K6 2.0 2.25 2.25 2.25 2.25 2.25 2.25 2.0 nand,nior
dnl Copyright (C) 1999, 2000 Free Software 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')
dnl M4_p and M4_i are the MMX and integer instructions
dnl M4_*_neg_dst means whether to negate the final result before writing
dnl M4_*_neg_src2 means whether to negate the src2 values before using them
define(M4_choose_op,
m4_assert_numargs(7)
`ifdef(`OPERATION_$1',`
define(`M4_function', `mpn_$1')
define(`M4_operation', `$1')
define(`M4_p', `$2')
define(`M4_p_neg_dst', `$3')
define(`M4_p_neg_src2',`$4')
define(`M4_i', `$5')
define(`M4_i_neg_dst', `$6')
define(`M4_i_neg_src2',`$7')
')')
dnl xnor is done in "iorn" style because it's a touch faster than "nior"
dnl style (the two are equivalent for xor).
M4_choose_op( and_n, pand,0,0, andl,0,0)
M4_choose_op( andn_n, pandn,0,0, andl,0,1)
M4_choose_op( nand_n, pand,1,0, andl,1,0)
M4_choose_op( ior_n, por,0,0, orl,0,0)
M4_choose_op( iorn_n, por,0,1, orl,0,1)
M4_choose_op( nior_n, por,1,0, orl,1,0)
M4_choose_op( xor_n, pxor,0,0, xorl,0,0)
M4_choose_op( xnor_n, pxor,0,1, xorl,0,1)
ifdef(`M4_function',,
`m4_error(`Unrecognised or undefined OPERATION symbol
')')
MULFUNC_PROLOGUE(mpn_and_n mpn_andn_n mpn_nand_n mpn_ior_n mpn_iorn_n mpn_nior_n mpn_xor_n mpn_xnor_n)
C void M4_function (mp_ptr dst, mp_srcptr src1, mp_srcptr src2,
C mp_size_t size);
C
C Do src1,size M4_operation src2,size, storing the result in dst,size.
C
C Unaligned movq loads and stores are a bit slower than aligned ones. The
C test at the start of the routine checks the alignment of src1 and if
C necessary processes one limb separately at the low end to make it aligned.
C
C The raw speeds without this alignment switch are as follows.
C
C alignment dst/src1/src2, A=0mod8, N=4mod8
C A/A/A A/A/N A/N/A A/N/N N/A/A N/A/N N/N/A N/N/N
C
C K6 1.5 2.0 1.5 2.0 and,andn,ior,xor
C K6 1.75 2.2 2.0 2.28 iorn,xnor
C K6 2.0 2.25 2.35 2.28 nand,nior
C
C
C Future:
C
C K6 can do one 64-bit load per cycle so each of these routines should be
C able to approach 1.0 c/l, if aligned. The basic and/andn/ior/xor might be
C able to get 1.0 with just a 4 limb loop, being 3 instructions per 2 limbs.
C The others are 4 instructions per 2 limbs, and so can only approach 1.0
C because there's nowhere to hide some loop control.
defframe(PARAM_SIZE,16)
defframe(PARAM_SRC2,12)
defframe(PARAM_SRC1,8)
defframe(PARAM_DST, 4)
deflit(`FRAME',0)
.text
ALIGN(32)
PROLOGUE(M4_function)
movl PARAM_SIZE, %ecx
pushl %ebx
FRAME_pushl()
movl PARAM_SRC1, %eax
movl PARAM_SRC2, %ebx
cmpl $1, %ecx
movl PARAM_DST, %edx
ja L(two_or_more)
movl (%ebx), %ecx
popl %ebx
ifelse(M4_i_neg_src2,1,`notl %ecx')
M4_i (%eax), %ecx
ifelse(M4_i_neg_dst,1,` notl %ecx')
movl %ecx, (%edx)
ret
L(two_or_more):
C eax src1
C ebx src2
C ecx size
C edx dst
C esi
C edi
C ebp
C
C carry bit is low of size
pushl %esi
FRAME_pushl()
testl $4, %eax
jz L(alignment_ok)
movl (%ebx), %esi
addl $4, %ebx
ifelse(M4_i_neg_src2,1,`notl %esi')
M4_i (%eax), %esi
addl $4, %eax
ifelse(M4_i_neg_dst,1,` notl %esi')
movl %esi, (%edx)
addl $4, %edx
decl %ecx
L(alignment_ok):
movl %ecx, %esi
shrl %ecx
jnz L(still_two_or_more)
movl (%ebx), %ecx
popl %esi
ifelse(M4_i_neg_src2,1,`notl %ecx')
M4_i (%eax), %ecx
ifelse(M4_i_neg_dst,1,` notl %ecx')
popl %ebx
movl %ecx, (%edx)
ret
L(still_two_or_more):
ifelse(eval(M4_p_neg_src2 || M4_p_neg_dst),1,`
pcmpeqd %mm7, %mm7 C all ones
')
ALIGN(16)
L(top):
C eax src1
C ebx src2
C ecx counter
C edx dst
C esi
C edi
C ebp
C
C carry bit is low of size
movq -8(%ebx,%ecx,8), %mm0
ifelse(M4_p_neg_src2,1,`pxor %mm7, %mm0')
M4_p -8(%eax,%ecx,8), %mm0
ifelse(M4_p_neg_dst,1,` pxor %mm7, %mm0')
movq %mm0, -8(%edx,%ecx,8)
loop L(top)
jnc L(no_extra)
movl -4(%ebx,%esi,4), %ebx
ifelse(M4_i_neg_src2,1,`notl %ebx')
M4_i -4(%eax,%esi,4), %ebx
ifelse(M4_i_neg_dst,1,` notl %ebx')
movl %ebx, -4(%edx,%esi,4)
L(no_extra):
popl %esi
popl %ebx
emms_or_femms
ret
EPILOGUE()
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