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#

# Copyright (c) 2005 Jakub Jermar

# All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

# - Redistributions of source code must retain the above copyright

#   notice, this list of conditions and the following disclaimer.

# - Redistributions in binary form must reproduce the above copyright

#   notice, this list of conditions and the following disclaimer in the

#   documentation and/or other materials provided with the distribution.

# - The name of the author may not be used to endorse or promote products

#   derived from this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#

#include <arch/arch.h>

#include <arch/stack.h>

.text

.register       %g2, #scratch

.register       %g3, #scratch

/*

 * This is the assembly language version of our _memcpy() generated by gcc.

 */

.global memcpy

memcpy:

	mov	%o0, %o3		! save dst

	add	%o1, 7, %g1

	and	%g1, -8, %g1

	cmp	%o1, %g1

	be,pn	%xcc, 3f

	add	%o0, 7, %g1

	mov	0, %g3

0:

	brz,pn	%o2, 2f

	mov	0, %g2

1:

	ldub	[%g3 + %o1], %g1

	add	%g2, 1, %g2

	cmp	%o2, %g2

	stb	%g1, [%g3 + %o0]

	bne,pt	%xcc, 1b

	mov	%g2, %g3

2:

	jmp	%o7 + 8			! exit point

	mov	%o3, %o0

3:

	and	%g1, -8, %g1

	cmp	%o0, %g1

	bne,pt	%xcc, 0b

	mov	0, %g3

	srlx	%o2, 3, %g4

	brz,pn	%g4, 5f

	mov	0, %g5

4:

	sllx	%g3, 3, %g2

	add	%g5, 1, %g3

	ldx	[%o1 + %g2], %g1

	mov	%g3, %g5

	cmp	%g4, %g3

	bne,pt	%xcc, 4b

	stx	%g1, [%o0 + %g2]

5:

	and	%o2, 7, %o2

	brz,pn	%o2, 2b

	sllx	%g4, 3, %g1

	mov	0, %g2

	add	%g1, %o0, %o0

	add	%g1, %o1, %g4

	mov	0, %g3

6:

	ldub	[%g2 + %g4], %g1

	stb	%g1, [%g2 + %o0]

	add	%g3, 1, %g2

	cmp	%o2, %g2

	bne,pt	%xcc, 6b

	mov	%g2, %g3

	jmp	%o7 + 8			! exit point

	mov	%o3, %o0

/*

 * Almost the same as memcpy() except the loads are from userspace.

 */

.global memcpy_from_uspace

memcpy_from_uspace:

	mov	%o0, %o3		! save dst

	add	%o1, 7, %g1

	and	%g1, -8, %g1

	cmp	%o1, %g1

	be,pn	%xcc, 3f

	add	%o0, 7, %g1

	mov	0, %g3

0:

	brz,pn	%o2, 2f

	mov	0, %g2

1:

	lduba	[%g3 + %o1] ASI_AIUS, %g1

	add	%g2, 1, %g2

	cmp	%o2, %g2

	stb	%g1, [%g3 + %o0]

	bne,pt	%xcc, 1b

	mov	%g2, %g3

2:

	jmp	%o7 + 8			! exit point

	mov	%o3, %o0

3:

	and	%g1, -8, %g1

	cmp	%o0, %g1

	bne,pt	%xcc, 0b

	mov	0, %g3

	srlx	%o2, 3, %g4

	brz,pn	%g4, 5f

	mov	0, %g5

4:

	sllx	%g3, 3, %g2

	add	%g5, 1, %g3

	ldxa	[%o1 + %g2] ASI_AIUS, %g1

	mov	%g3, %g5

	cmp	%g4, %g3

	bne,pt	%xcc, 4b

	stx	%g1, [%o0 + %g2]

5:

	and	%o2, 7, %o2

	brz,pn	%o2, 2b

	sllx	%g4, 3, %g1

	mov	0, %g2

	add	%g1, %o0, %o0

	add	%g1, %o1, %g4

	mov	0, %g3

6:

	lduba	[%g2 + %g4] ASI_AIUS, %g1

	stb	%g1, [%g2 + %o0]

	add	%g3, 1, %g2

	cmp	%o2, %g2

	bne,pt	%xcc, 6b

	mov	%g2, %g3

	jmp	%o7 + 8			! exit point

	mov	%o3, %o0

/*

 * Almost the same as memcpy() except the stores are to userspace.

 */

.global memcpy_to_uspace

memcpy_to_uspace:

	mov	%o0, %o3		! save dst

	add	%o1, 7, %g1

	and	%g1, -8, %g1

	cmp	%o1, %g1

	be,pn	%xcc, 3f

	add	%o0, 7, %g1

	mov	0, %g3

0:

	brz,pn	%o2, 2f

	mov	0, %g2

1:

	ldub	[%g3 + %o1], %g1

	add	%g2, 1, %g2

	cmp	%o2, %g2

	stba	%g1, [%g3 + %o0] ASI_AIUS

	bne,pt	%xcc, 1b

	mov	%g2, %g3

2:

	jmp	%o7 + 8			! exit point

	mov	%o3, %o0

3:

	and	%g1, -8, %g1

	cmp	%o0, %g1

	bne,pt	%xcc, 0b

	mov	0, %g3

	srlx	%o2, 3, %g4

	brz,pn	%g4, 5f

	mov	0, %g5

4:

	sllx	%g3, 3, %g2

	add	%g5, 1, %g3

	ldx	[%o1 + %g2], %g1

	mov	%g3, %g5

	cmp	%g4, %g3

	bne,pt	%xcc, 4b

	stxa	%g1, [%o0 + %g2] ASI_AIUS

5:

	and	%o2, 7, %o2

	brz,pn	%o2, 2b

	sllx	%g4, 3, %g1

	mov	0, %g2

	add	%g1, %o0, %o0

	add	%g1, %o1, %g4

	mov	0, %g3

6:

	ldub	[%g2 + %g4], %g1

	stba	%g1, [%g2 + %o0] ASI_AIUS

	add	%g3, 1, %g2

	cmp	%o2, %g2

	bne,pt	%xcc, 6b

	mov	%g2, %g3

	jmp	%o7 + 8			! exit point

	mov	%o3, %o0

.global memcpy_from_uspace_failover_address

.global memcpy_to_uspace_failover_address

memcpy_from_uspace_failover_address:

memcpy_to_uspace_failover_address:

	jmp	%o7 + 8			! exit point

	mov	%g0, %o0		! return 0 on failure

.global memsetb

memsetb:

	b _memsetb

	nop