From 9dacf0764b506a67f33dd63bdf48fc273c0bdb7f Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Fri, 13 Aug 2021 17:11:46 +0100 Subject: [PATCH] target/arm: Note that we handle VMOVL as a special case of VSHLL Although the architecture doesn't define it as an alias, VMOVL (vector move long) is encoded as a VSHLL with a zero shift. Add a comment in the decode file noting that we handle VMOVL as part of VSHLL. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson --- target/arm/mve.decode | 2 ++ 1 file changed, 2 insertions(+) diff --git a/target/arm/mve.decode b/target/arm/mve.decode index 595d97568e..fa9d921f93 100644 --- a/target/arm/mve.decode +++ b/target/arm/mve.decode @@ -364,6 +364,8 @@ VRSHRI_U 111 1 1111 1 . ... ... ... 0 0010 0 1 . 1 ... 0 @2_shr_h VRSHRI_U 111 1 1111 1 . ... ... ... 0 0010 0 1 . 1 ... 0 @2_shr_w # VSHLL T1 encoding; the T2 VSHLL encoding is elsewhere in this file +# Note that VMOVL is encoded as "VSHLL with a zero shift count"; we +# implement it that way rather than special-casing it in the decode. VSHLL_BS 111 0 1110 1 . 1 .. ... ... 0 1111 0 1 . 0 ... 0 @2_shll_b VSHLL_BS 111 0 1110 1 . 1 .. ... ... 0 1111 0 1 . 0 ... 0 @2_shll_h