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tcg: Split CONFIG_ATOMIC128

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GCC7+ will no longer advertise support for 16-byte __atomic operations
if only cmpxchg is supported, as for x86_64.  Fortunately, x86_64 still
has support for __sync_compare_and_swap_16 and we can make use of that.
AArch64 does not have, nor ever has had such support, so open-code it.

Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2018-08-15 16:31:47 -07:00
parent 383beda9cf
commit e6cd4bb59b
7 changed files with 213 additions and 14 deletions
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3
accel/tcg/cputlb.c
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@ -32,6 +32,7 @@
#include "exec/log.h"
#include "exec/helper-proto.h"
#include "qemu/atomic.h"
#include "qemu/atomic128.h"
/* DEBUG defines, enable DEBUG_TLB_LOG to log to the CPU_LOG_MMU target */
/* #define DEBUG_TLB */
@ -1112,7 +1113,7 @@ static void *atomic_mmu_lookup(CPUArchState *env, target_ulong addr,
#include "atomic_template.h"
#endif
#ifdef CONFIG_ATOMIC128
#if HAVE_CMPXCHG128 || HAVE_ATOMIC128
#define DATA_SIZE 16
#include "atomic_template.h"
#endif