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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/stack.h>
#include <arch/regdef.h>

.text

.global memcpy
.global memcpy_from_uspace
.global memcpy_to_uspace
.global memcpy_from_uspace_failover_address
.global memcpy_to_uspace_failover_address
.global memsetb


memcpy:
memcpy_from_uspace:
memcpy_to_uspace:
    .register       %g2, #scratch
        .register       %g3, #scratch
    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 %o1, %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 %o1, %o0

memcpy_from_uspace_failover_address:
memcpy_to_uspace_failover_address:
    jmp %o7 + 8         ! exit point
    mov %g0, %o0        ! return 0 on failure

memsetb:
    b _memsetb
    nop