0,0 → 1,175 |
/* Out-of-line libgcc versions of __sync_* builtins. */ |
/* Copyright (C) 2008-2015 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 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. |
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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. |
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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. |
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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/>. */ |
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/* This file is used by targets whose makefiles define SYNC |
to "yes". It is compiled with SYNC_CFLAGS and provides |
out-of-line versions of all relevant __sync_* primitives. |
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These routines are intended for targets like MIPS that have two |
ISA encodings (the "normal" ISA and the MIPS16 ISA). The normal |
ISA provides full synchronization capabilities but the MIPS16 ISA |
has no encoding for them. MIPS16 code must therefore call external |
non-MIPS16 implementations of the __sync_* routines. |
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The file is compiled once for each routine. The following __foo |
routines are selected by defining a macro called L<foo>: |
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__sync_synchronize |
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The following __foo_N routines are selected by defining FN=foo |
and SIZE=N: |
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__sync_fetch_and_add_N |
__sync_fetch_and_sub_N |
__sync_fetch_and_or_N |
__sync_fetch_and_and_N |
__sync_fetch_and_xor_N |
__sync_fetch_and_nand_N |
__sync_add_and_fetch_N |
__sync_sub_and_fetch_N |
__sync_or_and_fetch_N |
__sync_and_and_fetch_N |
__sync_xor_and_fetch_N |
__sync_nand_and_fetch_N |
__sync_bool_compare_and_swap_N |
__sync_val_compare_and_swap_N |
__sync_lock_test_and_set_N |
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SIZE can be 1, 2, 4, 8 or 16. __foo_N is omitted if the target does |
not provide __sync_compare_and_swap_N. |
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Note that __sync_lock_release does not fall back on external |
__sync_lock_release_N functions. The default implementation |
of __sync_lock_release is a call to __sync_synchronize followed |
by a store of zero, so we don't need separate library functions |
for it. */ |
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#if defined FN |
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/* Define functions called __sync_<NAME>_<UNITS>, with one macro per |
signature. TYPE is a type that has UNITS bytes. */ |
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#define DEFINE_V_PV(NAME, UNITS, TYPE) \ |
TYPE \ |
__##NAME##_##UNITS (TYPE *ptr, TYPE value) \ |
{ \ |
return __##NAME (ptr, value); \ |
} |
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#define DEFINE_V_PVV(NAME, UNITS, TYPE) \ |
TYPE \ |
__##NAME##_##UNITS (TYPE *ptr, TYPE value1, TYPE value2) \ |
{ \ |
return __##NAME (ptr, value1, value2); \ |
} |
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#define DEFINE_BOOL_PVV(NAME, UNITS, TYPE) \ |
_Bool \ |
__##NAME##_##UNITS (TYPE *ptr, TYPE value1, TYPE value2) \ |
{ \ |
return __##NAME (ptr, value1, value2); \ |
} |
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/* Map function names to the appropriate DEFINE_* macro. */ |
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#define local_sync_fetch_and_add DEFINE_V_PV |
#define local_sync_fetch_and_sub DEFINE_V_PV |
#define local_sync_fetch_and_or DEFINE_V_PV |
#define local_sync_fetch_and_and DEFINE_V_PV |
#define local_sync_fetch_and_xor DEFINE_V_PV |
#define local_sync_fetch_and_nand DEFINE_V_PV |
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#define local_sync_add_and_fetch DEFINE_V_PV |
#define local_sync_sub_and_fetch DEFINE_V_PV |
#define local_sync_or_and_fetch DEFINE_V_PV |
#define local_sync_and_and_fetch DEFINE_V_PV |
#define local_sync_xor_and_fetch DEFINE_V_PV |
#define local_sync_nand_and_fetch DEFINE_V_PV |
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#define local_sync_bool_compare_and_swap DEFINE_BOOL_PVV |
#define local_sync_val_compare_and_swap DEFINE_V_PVV |
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#define local_sync_lock_test_and_set DEFINE_V_PV |
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/* Define the function __<NAME>_<UNITS>, given that TYPE is a type with |
UNITS bytes. */ |
#define DEFINE1(NAME, UNITS, TYPE) \ |
static int unused[sizeof (TYPE) == UNITS ? 1 : -1] \ |
__attribute__((unused)); \ |
local_##NAME (NAME, UNITS, TYPE); |
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/* As above, but performing macro expansion on the arguments. */ |
#define DEFINE(NAME, UNITS, TYPE) DEFINE1 (NAME, UNITS, TYPE) |
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/* Find an appropriate type TYPE for SIZE and invoke DEFINE (FN, SIZE, TYPE). |
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The types chosen here may be incorrect for some targets. |
For example, targets with 16-byte atomicity support might not |
support OImode. We would need some kind of target-specific |
override if that becomes a problem. */ |
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#if SIZE == 1 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 |
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typedef unsigned int UQItype __attribute__((mode (QI))); |
DEFINE (FN, 1, UQItype) |
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#elif SIZE == 2 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 |
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typedef unsigned int UHItype __attribute__((mode (HI))); |
DEFINE (FN, 2, UHItype) |
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#elif SIZE == 4 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 |
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typedef unsigned int USItype __attribute__((mode (SI))); |
DEFINE (FN, 4, USItype) |
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#elif SIZE == 8 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 |
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typedef unsigned int UDItype __attribute__((mode (DI))); |
DEFINE (FN, 8, UDItype) |
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#elif SIZE == 16 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 |
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typedef unsigned int UOItype __attribute__((mode (OI))); |
DEFINE (FN, 8, UOItype) |
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#endif |
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#elif __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 \ |
|| __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 \ |
|| __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 \ |
|| __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 \ |
|| __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 |
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#if defined Lsync_synchronize |
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void |
__sync_synchronize (void) |
{ |
__sync_synchronize (); |
} |
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#endif |
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#endif |