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target/arm: Decode t32 simd 3reg and 2reg_scalar extension

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Happily, the bits are in the same places compared to a32.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180228193125.20577-16-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2018-03-02 10:45:45 +00:00 committed by Peter Maydell
parent 638808ff8a
commit 0052087efb
1 changed files with 13 additions and 1 deletions
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14
target/arm/translate.c
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@ -10774,7 +10774,19 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn)
default_exception_el(s));
break;
}
if (((insn >> 24) & 3) == 3) {
if ((insn & 0xfe000a00) == 0xfc000800
&& arm_dc_feature(s, ARM_FEATURE_V8)) {
/* The Thumb2 and ARM encodings are identical. */
if (disas_neon_insn_3same_ext(s, insn)) {
goto illegal_op;
}
} else if ((insn & 0xff000a00) == 0xfe000800
&& arm_dc_feature(s, ARM_FEATURE_V8)) {
/* The Thumb2 and ARM encodings are identical. */
if (disas_neon_insn_2reg_scalar_ext(s, insn)) {
goto illegal_op;
}
} else if (((insn >> 24) & 3) == 3) {
/* Translate into the equivalent ARM encoding. */
insn = (insn & 0xe2ffffff) | ((insn & (1 << 28)) >> 4) | (1 << 28);
if (disas_neon_data_insn(s, insn)) {