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Atomic operations for m68020 and up.
This commit is contained in:
Andreas Schwab
parent
dda8854aa5
commit
50c10df1af
227
sysdeps/m68k/m68020/bits/atomic.h
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227
sysdeps/m68k/m68020/bits/atomic.h
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/* Copyright (C) 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Andreas Schwab <schwab@suse.de>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <stdint.h>
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typedef int8_t atomic8_t;
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typedef uint8_t uatomic8_t;
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typedef int_fast8_t atomic_fast8_t;
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typedef uint_fast8_t uatomic_fast8_t;
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typedef int16_t atomic16_t;
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typedef uint16_t uatomic16_t;
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typedef int_fast16_t atomic_fast16_t;
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typedef uint_fast16_t uatomic_fast16_t;
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typedef int32_t atomic32_t;
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typedef uint32_t uatomic32_t;
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typedef int_fast32_t atomic_fast32_t;
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typedef uint_fast32_t uatomic_fast32_t;
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typedef int64_t atomic64_t;
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typedef uint64_t uatomic64_t;
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typedef int_fast64_t atomic_fast64_t;
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typedef uint_fast64_t uatomic_fast64_t;
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typedef intptr_t atomicptr_t;
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typedef uintptr_t uatomicptr_t;
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typedef intmax_t atomic_max_t;
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typedef uintmax_t uatomic_max_t;
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#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
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({ __typeof (*(mem)) __ret; \
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__asm __volatile ("cas%.b %0,%2,%1" \
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: "=d" (__ret), "=m" (*(mem)) \
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: "d" (newval), "m" (*(mem)), "0" (oldval)); \
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__ret; })
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#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
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({ __typeof (*(mem)) __ret; \
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__asm __volatile ("cas%.w %0,%2,%1" \
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: "=d" (__ret), "=m" (*(mem)) \
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: "d" (newval), "m" (*(mem)), "0" (oldval)); \
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__ret; })
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#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
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({ __typeof (*(mem)) __ret; \
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__asm __volatile ("cas%.l %0,%2,%1" \
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: "=d" (__ret), "=m" (*(mem)) \
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: "d" (newval), "m" (*(mem)), "0" (oldval)); \
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__ret; })
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# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
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({ __typeof (*(mem)) __ret; \
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__typeof (mem) __memp = (mem); \
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__asm __volatile ("cas2%.l %0:%R0,%1:%R1,(%2):(%3)" \
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: "=d" (__ret) \
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: "d" (newval), "r" (__memp), \
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"r" ((char *) __memp + 4), "0" (oldval) \
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: "memory"); \
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__ret; })
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#define atomic_exchange(mem, newvalue) \
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({ __typeof (*(mem)) __result = *(mem); \
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if (sizeof (*(mem)) == 1) \
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__asm __volatile ("1: cas%.b %0,%2,%1;" \
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" jbne 1b" \
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: "=d" (__result), "=m" (*(mem)) \
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: "d" (newvalue), "m" (*(mem)), "0" (__result)); \
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else if (sizeof (*(mem)) == 2) \
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__asm __volatile ("1: cas%.w %0,%2,%1;" \
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" jbne 1b" \
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: "=d" (__result), "=m" (*(mem)) \
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: "d" (newvalue), "m" (*(mem)), "0" (__result)); \
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else if (sizeof (*(mem)) == 4) \
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__asm __volatile ("1: cas%.l %0,%2,%1;" \
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" jbne 1b" \
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: "=d" (__result), "=m" (*(mem)) \
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: "d" (newvalue), "m" (*(mem)), "0" (__result)); \
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else \
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{ \
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__typeof (mem) __memp = (mem); \
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__asm __volatile ("1: cas2%.l %0:%R0,%1:%R1,(%2):(%3);" \
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" jbne 1b" \
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: "=d" (__result) \
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: "d" (newval), "r" (__memp), \
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"r" ((char *) __memp + 4), "0" (__result) \
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: "memory"); \
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} \
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__result; })
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#define atomic_exchange_and_add(mem, value) \
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({ __typeof (*(mem)) __result = *(mem); \
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__typeof (*(mem)) __temp; \
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if (sizeof (*(mem)) == 1) \
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__asm __volatile ("1: move%.b %0,%2;" \
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" add%.b %3,%2;" \
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" cas%.b %0,%2,%1;" \
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" jbne 1b" \
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: "=d" (__result), "=m" (*(mem)), \
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"=&d" (__temp) \
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: "d" (value), "1" (*(mem)), "0" (__result)); \
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else if (sizeof (*(mem)) == 2) \
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__asm __volatile ("1: move%.w %0,%2;" \
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" add%.w %3,%2;" \
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" cas%.w %0,%2,%1;" \
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" jbne 1b" \
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: "=d" (__result), "=m" (*(mem)), \
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"=&d" (__temp) \
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: "d" (value), "1" (*(mem)), "0" (__result)); \
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else if (sizeof (*(mem)) == 4) \
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__asm __volatile ("1: move%.l %0,%2;" \
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" add%.l %3,%2;" \
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" cas%.l %0,%2,%1;" \
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" jbne 1b" \
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: "=d" (__result), "=m" (*(mem)), \
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"=&d" (__temp) \
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: "d" (value), "1" (*(mem)), "0" (__result)); \
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else \
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{ \
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__typeof (mem) __memp = (mem); \
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__asm __volatile ("1: move%.l %0,%1;" \
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" move%.l %R0,%R1;" \
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" add%.l %2,%1;" \
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" addx%.l %R2,%R1;" \
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" cas2%.l %0:%R0,%1:%R1,(%3):(%4);" \
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" jbne 1b" \
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: "=d" (__result), "=&d" (__temp) \
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: "d" (value), "r" (__memp), \
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"r" ((char *) __memp + 4), "0" (__result) \
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: "memory"); \
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} \
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__result; })
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#define atomic_add(mem, value) \
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(void) ({ if (sizeof (*(mem)) == 1) \
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__asm __volatile ("add%.b %1,%0" \
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: "=m" (*(mem)) \
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: "id" (value), "0" (*(mem))); \
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else if (sizeof (*(mem)) == 2) \
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__asm __volatile ("add%.w %1,%0" \
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: "=m" (*(mem)) \
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: "id" (value), "0" (*(mem))); \
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else if (sizeof (*(mem)) == 4) \
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__asm __volatile ("add%.l %1,%0" \
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: "=m" (*(mem)) \
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: "id" (value), "0" (*(mem))); \
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else \
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{ \
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__typeof (mem) __memp = (mem); \
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__typeof (*(mem)) __oldval = *__memp; \
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__typeof (*(mem)) __temp; \
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__asm __volatile ("1: move%.l %0,%1;" \
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" move%.l %R0,%R1;" \
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" add%.l %2,%1;" \
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" addx%.l %R2,%R1;" \
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" cas2%.l %0:%R0,%1:%R1,(%3):(%4);" \
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" jbne 1b" \
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: "=d" (__oldval), "=&d" (__temp) \
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: "d" (value), "r" (__memp), \
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"r" ((char *) __memp + 4), "0" (__oldval) \
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: "memory"); \
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} \
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})
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#define atomic_decrement_and_test(mem) \
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({ char __result; \
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if (sizeof (*(mem)) == 1) \
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__asm __volatile ("subq%.b %#1,%1; scs %0" \
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: "=dm" (__result), "=m" (*(mem)) \
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: "1" (*(mem))); \
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else if (sizeof (*(mem)) == 2) \
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__asm __volatile ("subq%.w %#1,%1; scs %0" \
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: "=dm" (__result), "=m" (*(mem)) \
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: "1" (*(mem))); \
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else if (sizeof (*(mem)) == 4) \
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__asm __volatile ("subq%.l %#1,%1; scs %0" \
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: "=dm" (__result), "=m" (*(mem)) \
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: "1" (*(mem))); \
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else \
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{ \
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__typef (mem) __memp = (mem); \
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__typeof (*(mem)) __oldval = *__memp; \
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__typeof (*(mem)) __temp; \
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__asm __volatile ("1: move%.l %1,%2;" \
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" move%.l %R1,%R2;" \
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" subq%.l %#1,%2;" \
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" subx%.l %5,%R2;" \
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" scs %0;" \
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" cas2%.l %1:%R1,%2:%R2,(%3):(%4);" \
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" jbne 1b" \
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: "=&dm" (__result), "=d" (__oldval), \
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"=&d" (__temp) \
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: "r" (__memp), "r" ((char *) __memp + 4), \
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"d" (0), "1" (__oldval) \
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: "memory"); \
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} \
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__result; })
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#define atomic_bit_set(mem, bit) \
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__asm __volatile ("bfset %0{%1,#1}" \
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: "=m" (*(mem)) \
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: "di" (sizeof (*(mem)) * 8 - (bit) - 1), "m" (*(mem)))
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#define atomic_bit_test_set(mem, bit) \
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({ char __result; \
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__asm __volatile ("bfset %1{%2,#1}; sne %0" \
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: "=dm" (__result), "=m" (*(mem)) \
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: "di" (sizeof (*(mem)) * 8 - (bit) - 1), \
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"m" (*(mem))); \
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__result; })
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