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-rw-r--r--target-arm/translate.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/target-arm/translate.c b/target-arm/translate.c
index a86c54c..0a9b3cf 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -5084,11 +5084,18 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
}
} else { /* (insn & 0x00380080) == 0 */
int invert;
+ if (q && (rd & 1)) {
+ return 1;
+ }
op = (insn >> 8) & 0xf;
/* One register and immediate. */
imm = (u << 7) | ((insn >> 12) & 0x70) | (insn & 0xf);
invert = (insn & (1 << 5)) != 0;
+ /* Note that op = 2,3,4,5,6,7,10,11,12,13 imm=0 is UNPREDICTABLE.
+ * We choose to not special-case this and will behave as if a
+ * valid constant encoding of 0 had been given.
+ */
switch (op) {
case 0: case 1:
/* no-op */
@@ -5120,6 +5127,9 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
imm = ~imm;
break;
case 15:
+ if (invert) {
+ return 1;
+ }
imm = ((imm & 0x80) << 24) | ((imm & 0x3f) << 19)
| ((imm & 0x40) ? (0x1f << 25) : (1 << 30));
break;