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target/arm/translate-a64: Fix FCMLA decoding error 

The FCMLA (by element) instruction exists in the
"vector x indexed element" encoding group, but not in
the "scalar x indexed element" group. Correctly UNDEF
the unallocated encodings.

Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Message-id: 20190129140411.682-2-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2019-02-01 14:55:45 +00:00
parent 5601be3b01
commit 4dfabb6d56
1 changed files with 1 additions and 1 deletions
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2
target/arm/translate-a64.c
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@ -12650,7 +12650,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
case 0x13: /* FCMLA #90 */
case 0x15: /* FCMLA #180 */
case 0x17: /* FCMLA #270 */
if (!dc_isar_feature(aa64_fcma, s)) {
if (is_scalar || !dc_isar_feature(aa64_fcma, s)) {
unallocated_encoding(s);
return;
}