dnl  Intel Pentium mpn_and_n,...,mpn_xnor_n -- bitwise logical operations.

dnl  Copyright 2001, 2002 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 P5: 3.0 c/l  and, ior, xor

C     3.5 c/l  andn, iorn, nand, nior, xnor

define(M4_choose_op,

`ifdef(`OPERATION_$1',`

define(`M4_function', `mpn_$1')

define(`M4_want_pre', `$4')

define(`M4op',        `$3')

define(`M4_want_post',`$2')

')')

define(M4pre, `ifelse(M4_want_pre, yes,`$1')')

define(M4post,`ifelse(M4_want_post,yes,`$1')')

M4_choose_op( and_n,     , andl,    )

M4_choose_op( andn_n,    , andl, yes)

M4_choose_op( nand_n, yes, andl,    )

M4_choose_op( ior_n,     ,  orl,    )

M4_choose_op( iorn_n,    ,  orl, yes)

M4_choose_op( nior_n, yes,  orl,    )

M4_choose_op( xor_n,     , xorl,    )

M4_choose_op( xnor_n, yes, xorl,    )

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)

NAILS_SUPPORT(0-31)

C void M4_function (mp_ptr wp, mp_srcptr xp, mp_srcptr yp, mp_size_t size);

C

C Nothing complicated here, just some care to avoid data cache bank clashes

C and AGIs.

C

C We're one register short of being able to do a simple 4 loads, 2 ops, 2

C stores.  Instead %ebp is juggled a bit and nops are introduced to keep the

C pairings as intended.  An in-place operation would free up a register, for

C an 0.5 c/l speedup, if that's worth bothering with.

C

C This code seems best for P55 too.  Data alignment is a big problem for MMX

C and the pairing restrictions on movq and integer instructions make life

C difficult.

defframe(PARAM_SIZE,16)

defframe(PARAM_YP,  12)

defframe(PARAM_XP,   8)

defframe(PARAM_WP,   4)

	TEXT

	ALIGN(8)

PROLOGUE(M4_function)

deflit(`FRAME',0)

	pushl	%ebx	FRAME_pushl()

	pushl	%esi	FRAME_pushl()

	pushl	%edi	FRAME_pushl()

	pushl	%ebp	FRAME_pushl()

	movl	PARAM_SIZE, %ecx

	movl	PARAM_XP, %ebx

	movl	PARAM_YP, %esi

	movl	PARAM_WP, %edi

	shrl	%ecx

	jnc	L(entry)

	movl	(%ebx,%ecx,8), %eax	C risk of data cache bank clash here

	movl	(%esi,%ecx,8), %edx

M4pre(`	notl_or_xorl_GMP_NUMB_MASK(%edx)')

	M4op	%edx, %eax

M4post(`xorl	$GMP_NUMB_MASK, %eax')

	orl	%ecx, %ecx

	movl	%eax, (%edi,%ecx,8)

	jz	L(done)

	jmp	L(entry)

L(top):

	C eax

	C ebx	xp

	C ecx	counter, limb pairs, decrementing

	C edx

	C esi	yp

	C edi	wp

	C ebp

	M4op	%ebp, %edx

	nop

M4post(`xorl	$GMP_NUMB_MASK, %eax')

M4post(`xorl	$GMP_NUMB_MASK, %edx')

	movl	%eax, 4(%edi,%ecx,8)

	movl	%edx, (%edi,%ecx,8)

L(entry):

	movl	-4(%ebx,%ecx,8), %ebp

	nop

	movl	-4(%esi,%ecx,8), %eax

	movl	-8(%esi,%ecx,8), %edx

M4pre(`	xorl	$GMP_NUMB_MASK, %eax')

M4pre(`	xorl	$GMP_NUMB_MASK, %edx')

	M4op	%ebp, %eax

	movl	-8(%ebx,%ecx,8), %ebp

	decl	%ecx

	jnz	L(top)

	M4op	%ebp, %edx

	nop

M4post(`xorl	$GMP_NUMB_MASK, %eax')

M4post(`xorl	$GMP_NUMB_MASK, %edx')

	movl	%eax, 4(%edi,%ecx,8)

	movl	%edx, (%edi,%ecx,8)

L(done):

	popl	%ebp

	popl	%edi

	popl	%esi

	popl	%ebx

	ret

EPILOGUE()