The PRFM prefetch insn in the load/store with imm9 encodings
requires idx field 0b00; we were underdecoding this by
only checking !is_unpriv (which is equivalent to idx != 2).
Correctly UNDEF the unallocated encodings where idx == 0b01
and 0b11 as well as 0b10.
Reported-by: Laurent Desnogues <laurent.desnog...@gmail.com>
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
target/arm/translate-a64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index e6df303e321..8e081758e03 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -2803,7 +2803,7 @@ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t
insn,
} else {
if (size == 3 && opc == 2) {
/* PRFM - prefetch */
- if (is_unpriv) {
+ if (idx != 0) {
unallocated_encoding(s);
return;
}
--
2.20.1
