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tcg: Use HAVE_CMPXCHG128 instead of CONFIG_CMPXCHG128

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We adjust CONFIG_ATOMIC128 and CONFIG_CMPXCHG128 with
CONFIG_ATOMIC128_OPT in atomic128.h.  It is difficult
to tell when those changes have been applied with the
ifdef we must use with CONFIG_CMPXCHG128.  So instead
use HAVE_CMPXCHG128, which triggers -Werror-undef when
the proper header has not been included.

Improves tcg_gen_atomic_cmpxchg_i128 for s390x host, which
requires CONFIG_ATOMIC128_OPT.  Without this we fall back
to EXCP_ATOMIC to single-step 128-bit atomics, which is
slow enough to cause some tests to time out.

Reported-by: Thomas Huth <thuth@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-07-13 20:06:15 +00:00
parent deba78709a
commit 76f9d6ad19
6 changed files with 7 additions and 5 deletions
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2
tcg/tcg-op-ldst.c
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@ -778,7 +778,7 @@ typedef void (*gen_atomic_op_i64)(TCGv_i64, TCGv_env, TCGv_i64,
#else
# define WITH_ATOMIC64(X)
#endif
#ifdef CONFIG_CMPXCHG128
#if HAVE_CMPXCHG128
# define WITH_ATOMIC128(X) X,
#else
# define WITH_ATOMIC128(X)