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/* Copyright (C) 2003-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#define __HAVE_64B_ATOMICS 1
#define USE_ATOMIC_COMPILER_BUILTINS 0
/* XXX Is this actually correct? */
#define ATOMIC_EXCHANGE_USES_CAS 1
#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
({ __typeof (*(mem)) __ret; \
__asm __volatile ("cas%.b %0,%2,%1" \
: "=d" (__ret), "+m" (*(mem)) \
: "d" (newval), "0" (oldval)); \
__ret; })
#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
({ __typeof (*(mem)) __ret; \
__asm __volatile ("cas%.w %0,%2,%1" \
: "=d" (__ret), "+m" (*(mem)) \
: "d" (newval), "0" (oldval)); \
__ret; })
#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
({ __typeof (*(mem)) __ret; \
__asm __volatile ("cas%.l %0,%2,%1" \
: "=d" (__ret), "+m" (*(mem)) \
: "d" (newval), "0" (oldval)); \
__ret; })
# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
({ __typeof (*(mem)) __ret; \
__typeof (mem) __memp = (mem); \
__asm __volatile ("cas2%.l %0:%R0,%1:%R1,(%2):(%3)" \
: "=d" (__ret) \
: "d" ((__typeof (*(mem))) (newval)), "r" (__memp), \
"r" ((char *) __memp + 4), "0" (oldval) \
: "memory"); \
__ret; })
#define atomic_exchange_acq(mem, newvalue) \
({ __typeof (*(mem)) __result = *(mem); \
if (sizeof (*(mem)) == 1) \
__asm __volatile ("1: cas%.b %0,%2,%1;" \
" jbne 1b" \
: "=d" (__result), "+m" (*(mem)) \
: "d" (newvalue), "0" (__result)); \
else if (sizeof (*(mem)) == 2) \
__asm __volatile ("1: cas%.w %0,%2,%1;" \
" jbne 1b" \
: "=d" (__result), "+m" (*(mem)) \
: "d" (newvalue), "0" (__result)); \
else if (sizeof (*(mem)) == 4) \
__asm __volatile ("1: cas%.l %0,%2,%1;" \
" jbne 1b" \
: "=d" (__result), "+m" (*(mem)) \
: "d" (newvalue), "0" (__result)); \
else \
{ \
__typeof (mem) __memp = (mem); \
__asm __volatile ("1: cas2%.l %0:%R0,%1:%R1,(%2):(%3);" \
" jbne 1b" \
: "=d" (__result) \
: "d" ((__typeof (*(mem))) (newvalue)), \
"r" (__memp), "r" ((char *) __memp + 4), \
"0" (__result) \
: "memory"); \
} \
__result; })
#define atomic_exchange_and_add(mem, value) \
({ __typeof (*(mem)) __result = *(mem); \
__typeof (*(mem)) __temp; \
if (sizeof (*(mem)) == 1) \
__asm __volatile ("1: move%.b %0,%2;" \
" add%.b %3,%2;" \
" cas%.b %0,%2,%1;" \
" jbne 1b" \
: "=d" (__result), "+m" (*(mem)), \
"=&d" (__temp) \
: "d" (value), "0" (__result)); \
else if (sizeof (*(mem)) == 2) \
__asm __volatile ("1: move%.w %0,%2;" \
" add%.w %3,%2;" \
" cas%.w %0,%2,%1;" \
" jbne 1b" \
: "=d" (__result), "+m" (*(mem)), \
"=&d" (__temp) \
: "d" (value), "0" (__result)); \
else if (sizeof (*(mem)) == 4) \
__asm __volatile ("1: move%.l %0,%2;" \
" add%.l %3,%2;" \
" cas%.l %0,%2,%1;" \
" jbne 1b" \
: "=d" (__result), "+m" (*(mem)), \
"=&d" (__temp) \
: "d" (value), "0" (__result)); \
else \
{ \
__typeof (mem) __memp = (mem); \
__asm __volatile ("1: move%.l %0,%1;" \
" move%.l %R0,%R1;" \
" add%.l %R2,%R1;" \
" addx%.l %2,%1;" \
" cas2%.l %0:%R0,%1:%R1,(%3):(%4);" \
" jbne 1b" \
: "=d" (__result), "=&d" (__temp) \
: "d" ((__typeof (*(mem))) (value)), "r" (__memp), \
"r" ((char *) __memp + 4), "0" (__result) \
: "memory"); \
} \
__result; })
#define atomic_add(mem, value) \
(void) ({ if (sizeof (*(mem)) == 1) \
__asm __volatile ("add%.b %1,%0" \
: "+m" (*(mem)) \
: "id" (value)); \
else if (sizeof (*(mem)) == 2) \
__asm __volatile ("add%.w %1,%0" \
: "+m" (*(mem)) \
: "id" (value)); \
else if (sizeof (*(mem)) == 4) \
__asm __volatile ("add%.l %1,%0" \
: "+m" (*(mem)) \
: "id" (value)); \
else \
{ \
__typeof (mem) __memp = (mem); \
__typeof (*(mem)) __oldval = *__memp; \
__typeof (*(mem)) __temp; \
__asm __volatile ("1: move%.l %0,%1;" \
" move%.l %R0,%R1;" \
" add%.l %R2,%R1;" \
" addx%.l %2,%1;" \
" cas2%.l %0:%R0,%1:%R1,(%3):(%4);" \
" jbne 1b" \
: "=d" (__oldval), "=&d" (__temp) \
: "d" ((__typeof (*(mem))) (value)), \
"r" (__memp), "r" ((char *) __memp + 4), \
"0" (__oldval) \
: "memory"); \
} \
})
#define atomic_increment_and_test(mem) \
({ char __result; \
if (sizeof (*(mem)) == 1) \
__asm __volatile ("addq%.b %#1,%1; seq %0" \
: "=dm" (__result), "+m" (*(mem))); \
else if (sizeof (*(mem)) == 2) \
__asm __volatile ("addq%.w %#1,%1; seq %0" \
: "=dm" (__result), "+m" (*(mem))); \
else if (sizeof (*(mem)) == 4) \
__asm __volatile ("addq%.l %#1,%1; seq %0" \
: "=dm" (__result), "+m" (*(mem))); \
else \
{ \
__typeof (mem) __memp = (mem); \
__typeof (*(mem)) __oldval = *__memp; \
__typeof (*(mem)) __temp; \
__asm __volatile ("1: move%.l %1,%2;" \
" move%.l %R1,%R2;" \
" addq%.l %#1,%R2;" \
" addx%.l %5,%2;" \
" seq %0;" \
" cas2%.l %1:%R1,%2:%R2,(%3):(%4);" \
" jbne 1b" \
: "=&dm" (__result), "=d" (__oldval), \
"=&d" (__temp) \
: "r" (__memp), "r" ((char *) __memp + 4), \
"d" (0), "1" (__oldval) \
: "memory"); \
} \
__result; })
#define atomic_decrement_and_test(mem) \
({ char __result; \
if (sizeof (*(mem)) == 1) \
__asm __volatile ("subq%.b %#1,%1; seq %0" \
: "=dm" (__result), "+m" (*(mem))); \
else if (sizeof (*(mem)) == 2) \
__asm __volatile ("subq%.w %#1,%1; seq %0" \
: "=dm" (__result), "+m" (*(mem))); \
else if (sizeof (*(mem)) == 4) \
__asm __volatile ("subq%.l %#1,%1; seq %0" \
: "=dm" (__result), "+m" (*(mem))); \
else \
{ \
__typeof (mem) __memp = (mem); \
__typeof (*(mem)) __oldval = *__memp; \
__typeof (*(mem)) __temp; \
__asm __volatile ("1: move%.l %1,%2;" \
" move%.l %R1,%R2;" \
" subq%.l %#1,%R2;" \
" subx%.l %5,%2;" \
" seq %0;" \
" cas2%.l %1:%R1,%2:%R2,(%3):(%4);" \
" jbne 1b" \
: "=&dm" (__result), "=d" (__oldval), \
"=&d" (__temp) \
: "r" (__memp), "r" ((char *) __memp + 4), \
"d" (0), "1" (__oldval) \
: "memory"); \
} \
__result; })
#define atomic_bit_set(mem, bit) \
__asm __volatile ("bfset %0{%1,#1}" \
: "+m" (*(mem)) \
: "di" (sizeof (*(mem)) * 8 - (bit) - 1))
#define atomic_bit_test_set(mem, bit) \
({ char __result; \
__asm __volatile ("bfset %1{%2,#1}; sne %0" \
: "=dm" (__result), "+m" (*(mem)) \
: "di" (sizeof (*(mem)) * 8 - (bit) - 1)); \
__result; })
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