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

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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.

Backports commit 4dfabb6d568e6b315594d7d464dacaf3368aff60 from qemu
This commit is contained in:
Peter Maydell 2019-02-03 17:40:33 -05:00 committed by Lioncash
parent eaecbe7901
commit f999e06c22
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1 changed files with 1 additions and 1 deletions
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qemu/target/arm/translate-a64.c
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@ -12821,7 +12821,7 @@ 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;
}