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julius |
/* Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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/* As a special exception, if you link this library with other files,
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some of which are compiled with GCC, to produce an executable,
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this library does not by itself cause the resulting executable
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to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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!! Linux specific atomic routines for the Renesas / SuperH SH CPUs.
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!! Linux kernel for SH3/4 has implemented the support for software
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!! atomic sequences.
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#define FUNC(X) .type X,@function
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#define HIDDEN_FUNC(X) FUNC(X); .hidden X
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#define ENDFUNC0(X) .Lfe_##X: .size X,.Lfe_##X-X
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#define ENDFUNC(X) ENDFUNC0(X)
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#if ! __SH5__
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#define ATOMIC_TEST_AND_SET(N,T) \
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.global __sync_lock_test_and_set_##N; \
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HIDDEN_FUNC(__sync_lock_test_and_set_##N); \
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.align 2; \
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__sync_lock_test_and_set_##N:; \
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mova 1f, r0; \
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nop; \
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mov r15, r1; \
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mov #(0f-1f), r15; \
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0: mov.##T @r4, r2; \
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mov.##T r5, @r4; \
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1: mov r1, r15; \
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rts; \
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mov r2, r0; \
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ENDFUNC(__sync_lock_test_and_set_##N)
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ATOMIC_TEST_AND_SET (1,b)
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ATOMIC_TEST_AND_SET (2,w)
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ATOMIC_TEST_AND_SET (4,l)
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#define ATOMIC_COMPARE_AND_SWAP(N,T) \
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.global __sync_compare_and_swap_##N; \
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HIDDEN_FUNC(__sync_compare_and_swap_##N); \
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.align 2; \
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__sync_compare_and_swap_##N:; \
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mova 1f, r0; \
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nop; \
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mov r15, r1; \
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mov #(0f-1f), r15; \
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0: mov.##T @r4, r2; \
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cmp/eq r2, r5; \
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bf 1f; \
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mov.##T r6, @r4; \
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1: mov r1, r15; \
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rts; \
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mov r2, r0; \
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ENDFUNC(__sync_compare_and_swap_##N)
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ATOMIC_COMPARE_AND_SWAP (1,b)
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ATOMIC_COMPARE_AND_SWAP (2,w)
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ATOMIC_COMPARE_AND_SWAP (4,l)
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#define ATOMIC_FETCH_AND_OP(OP,N,T) \
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.global __sync_fetch_and_##OP##_##N; \
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HIDDEN_FUNC(__sync_fetch_and_##OP##_##N); \
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.align 2; \
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__sync_fetch_and_##OP##_##N:; \
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mova 1f, r0; \
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mov r15, r1; \
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mov #(0f-1f), r15; \
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0: mov.##T @r4, r2; \
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OP r2, r5; \
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mov.##T r5, @r4; \
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1: mov r1, r15; \
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rts; \
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mov r2, r0; \
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ENDFUNC(__sync_fetch_and_##OP##_##N)
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ATOMIC_FETCH_AND_OP(add,1,b)
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ATOMIC_FETCH_AND_OP(add,2,w)
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ATOMIC_FETCH_AND_OP(add,4,l)
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ATOMIC_FETCH_AND_OP(or,1,b)
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ATOMIC_FETCH_AND_OP(or,2,w)
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ATOMIC_FETCH_AND_OP(or,4,l)
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ATOMIC_FETCH_AND_OP(and,1,b)
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ATOMIC_FETCH_AND_OP(and,2,w)
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ATOMIC_FETCH_AND_OP(and,4,l)
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ATOMIC_FETCH_AND_OP(xor,1,b)
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ATOMIC_FETCH_AND_OP(xor,2,w)
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ATOMIC_FETCH_AND_OP(xor,4,l)
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#define ATOMIC_FETCH_AND_COMBOP(OP,OP0,OP1,N,T) \
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.global __sync_fetch_and_##OP##_##N; \
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HIDDEN_FUNC(__sync_fetch_and_##OP##_##N); \
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.align 2; \
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__sync_fetch_and_##OP##_##N:; \
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mova 1f, r0; \
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nop; \
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mov r15, r1; \
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mov #(0f-1f), r15; \
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0: mov.##T @r4, r2; \
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OP0 r2, r5; \
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OP1 r5, r5; \
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mov.##T r5, @r4; \
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1: mov r1, r15; \
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rts; \
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mov r2, r0; \
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ENDFUNC(__sync_fetch_and_##OP##_##N)
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ATOMIC_FETCH_AND_COMBOP(sub,sub,neg,1,b)
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ATOMIC_FETCH_AND_COMBOP(sub,sub,neg,2,w)
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ATOMIC_FETCH_AND_COMBOP(sub,sub,neg,4,l)
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ATOMIC_FETCH_AND_COMBOP(nand,and,not,1,b)
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ATOMIC_FETCH_AND_COMBOP(nand,and,not,2,w)
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ATOMIC_FETCH_AND_COMBOP(nand,and,not,4,l)
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#endif /* ! __SH5__ */
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