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target/s390x: check alignment in CDSG in the !CONFIG_ATOMIC128 case

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The CDSG instruction requires a 16-byte alignement, as expressed in
the MO_ALIGN_16 passed to helper_atomic_cmpxchgo_be_mmu. In the non
parallel case, use check_alignment to enforce this.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170604202034.16615-4-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Aurelien Jarno 2017-06-04 22:20:34 +02:00 • committed by Richard Henderson
parent c21b610f58
commit c0080f1bdb
1 changed files with 2 additions and 0 deletions
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target/s390x/mem_helper.c
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@ -1262,6 +1262,8 @@ void HELPER(cdsg)(CPUS390XState *env, uint64_t addr,
} else {
uint64_t oldh, oldl;
check_alignment(env, addr, 16, ra);
oldh = cpu_ldq_data_ra(env, addr + 0, ra);
oldl = cpu_ldq_data_ra(env, addr + 8, ra);