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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. Backports commit 4dfabb6d568e6b315594d7d464dacaf3368aff60 from qemu
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@ -12821,7 +12821,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
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case 0x13: /* FCMLA #90 */
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case 0x13: /* FCMLA #90 */
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case 0x15: /* FCMLA #180 */
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case 0x15: /* FCMLA #180 */
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case 0x17: /* FCMLA #270 */
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case 0x17: /* FCMLA #270 */
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if (!dc_isar_feature(aa64_fcma, s)) {
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if (is_scalar || !dc_isar_feature(aa64_fcma, s)) {
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unallocated_encoding(s);
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unallocated_encoding(s);
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return;
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return;
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}
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}
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