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/* Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
!! Linux specific atomic routines for the Renesas / SuperH SH CPUs.
!! Linux kernel for SH3/4 has implemented the support for software
!! atomic sequences.
#define FUNC(X) .type X,@function
#define HIDDEN_FUNC(X) FUNC(X); .hidden X
#define ENDFUNC0(X) .Lfe_##X: .size X,.Lfe_##X-X
#define ENDFUNC(X) ENDFUNC0(X)
#if ! __SH5__
#define ATOMIC_TEST_AND_SET(N,T,EXT) \
.global __sync_lock_test_and_set_##N; \
HIDDEN_FUNC(__sync_lock_test_and_set_##N); \
.align 2; \
__sync_lock_test_and_set_##N:; \
mova 1f, r0; \
nop; \
mov r15, r1; \
mov #(0f-1f), r15; \
0: mov.##T @r4, r2; \
mov.##T r5, @r4; \
1: mov r1, r15; \
rts; \
EXT r2, r0; \
ENDFUNC(__sync_lock_test_and_set_##N)
ATOMIC_TEST_AND_SET (1,b,extu.b)
ATOMIC_TEST_AND_SET (2,w,extu.w)
ATOMIC_TEST_AND_SET (4,l,mov)
#define ATOMIC_COMPARE_AND_SWAP(N,T,EXTS,EXT) \
.global __sync_compare_and_swap_##N; \
HIDDEN_FUNC(__sync_compare_and_swap_##N); \
.align 2; \
__sync_compare_and_swap_##N:; \
mova 1f, r0; \
EXTS r5, r5; \
mov r15, r1; \
mov #(0f-1f), r15; \
0: mov.##T @r4, r2; \
cmp/eq r2, r5; \
bf 1f; \
mov.##T r6, @r4; \
1: mov r1, r15; \
rts; \
EXT r2, r0; \
ENDFUNC(__sync_compare_and_swap_##N)
ATOMIC_COMPARE_AND_SWAP (1,b,exts.b,extu.b)
ATOMIC_COMPARE_AND_SWAP (2,w,exts.w,extu.w)
ATOMIC_COMPARE_AND_SWAP (4,l,mov,mov)
#define ATOMIC_FETCH_AND_OP(OP,N,T,EXT) \
.global __sync_fetch_and_##OP##_##N; \
HIDDEN_FUNC(__sync_fetch_and_##OP##_##N); \
.align 2; \
__sync_fetch_and_##OP##_##N:; \
mova 1f, r0; \
nop; \
mov r15, r1; \
mov #(0f-1f), r15; \
0: mov.##T @r4, r2; \
mov r5, r3; \
OP r2, r3; \
mov.##T r3, @r4; \
1: mov r1, r15; \
rts; \
EXT r2, r0; \
ENDFUNC(__sync_fetch_and_##OP##_##N)
ATOMIC_FETCH_AND_OP(add,1,b,extu.b)
ATOMIC_FETCH_AND_OP(add,2,w,extu.w)
ATOMIC_FETCH_AND_OP(add,4,l,mov)
ATOMIC_FETCH_AND_OP(or,1,b,extu.b)
ATOMIC_FETCH_AND_OP(or,2,w,extu.w)
ATOMIC_FETCH_AND_OP(or,4,l,mov)
ATOMIC_FETCH_AND_OP(and,1,b,extu.b)
ATOMIC_FETCH_AND_OP(and,2,w,extu.w)
ATOMIC_FETCH_AND_OP(and,4,l,mov)
ATOMIC_FETCH_AND_OP(xor,1,b,extu.b)
ATOMIC_FETCH_AND_OP(xor,2,w,extu.w)
ATOMIC_FETCH_AND_OP(xor,4,l,mov)
#define ATOMIC_FETCH_AND_COMBOP(OP,OP0,OP1,N,T,EXT) \
.global __sync_fetch_and_##OP##_##N; \
HIDDEN_FUNC(__sync_fetch_and_##OP##_##N); \
.align 2; \
__sync_fetch_and_##OP##_##N:; \
mova 1f, r0; \
mov r15, r1; \
mov #(0f-1f), r15; \
0: mov.##T @r4, r2; \
mov r5, r3; \
OP0 r2, r3; \
OP1 r3, r3; \
mov.##T r3, @r4; \
1: mov r1, r15; \
rts; \
EXT r2, r0; \
ENDFUNC(__sync_fetch_and_##OP##_##N)
ATOMIC_FETCH_AND_COMBOP(sub,sub,neg,1,b,extu.b)
ATOMIC_FETCH_AND_COMBOP(sub,sub,neg,2,w,extu.w)
ATOMIC_FETCH_AND_COMBOP(sub,sub,neg,4,l,mov)
ATOMIC_FETCH_AND_COMBOP(nand,and,not,1,b,extu.b)
ATOMIC_FETCH_AND_COMBOP(nand,and,not,2,w,extu.w)
ATOMIC_FETCH_AND_COMBOP(nand,and,not,4,l,mov)
#endif /* ! __SH5__ */
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