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target/arm: Correct exclusive store cmpxchg memop mask 

When we perform the atomic_cmpxchg operation we want to perform the
operation on a pair of 32-bit registers. Previously we were just passing
the register size in which was set to MO_32. This would result in the
high register to be ignored. To fix this issue we hardcode the size to
be 64-bits long when operating on 32-bit pairs.

Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Portia Stephens <portia.stephens@xilinx.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20170815145714.17635-2-richard.henderson@linaro.org
Message-Id: <bc18dddca56e8c2ea4a3def48d33ceb5d21d1fff.1502488636.git.alistair.francis@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alistair Francis 2017-08-15 07:57:12 -07:00 committed by Peter Maydell
parent 47025a0193
commit 955fd0ad5d
1 changed files with 1 additions and 1 deletions
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2
target/arm/translate-a64.c
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@ -1913,7 +1913,7 @@ static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
tcg_gen_concat32_i64(val, cpu_exclusive_val, cpu_exclusive_high);
tcg_gen_atomic_cmpxchg_i64(tmp, addr, val, tmp,
get_mem_index(s),
size | MO_ALIGN | s->be_data);
MO_64 | MO_ALIGN | s->be_data);
tcg_gen_setcond_i64(TCG_COND_NE, tmp, tmp, val);
tcg_temp_free_i64(val);
} else if (s->be_data == MO_LE) {