From: Taylor Simpson <ltaylorsimpson@gmail.com>
To: Matheus Tavares Bernardino <matheus.bernardino@oss.qualcomm.com>
Cc: qemu-devel@nongnu.org, brian.cain@oss.qualcomm.com, ale@rev.ng,
anjo@rev.ng, marco.liebel@oss.qualcomm.com, philmd@linaro.org,
quic_mburton@quicinc.com, sid.manning@oss.qualcomm.com
Subject: Re: [PATCH 02/13] target/hexagon: fix incorrect/too-permissive HVX encodings
Date: Mon, 23 Mar 2026 13:21:55 -0600 [thread overview]
Message-ID: <CAATN3NpYyA6+++vptA_CXE_0Yxffm+chn8p7NHRGGYM8N4e4vQ@mail.gmail.com> (raw)
In-Reply-To: <dee3cd0407272dacb1ac617e6179943168fb0691.1774271525.git.matheus.bernardino@oss.qualcomm.com>
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On Mon, Mar 23, 2026 at 7:15 AM Matheus Tavares Bernardino <
matheus.bernardino@oss.qualcomm.com> wrote:
> The following encodings have become stricter since v68:
>
> - V6_vunpackob, V6_vunpackoh: ---00 -> --000
> - V6_vaddbq/hq/wq, V6_vaddbnq/hnq/wnq: ---01 -> --001
> - V6_vsubbq/hq, V6_vsubwq/bnq/hnq/wnq: ---01/---10 -> --001/--010
> - V6_vhist, V6_vwhist128/256, V6_vwhist128/256_sat: ---00 -> --000
> - V6_vhistq, V6_vwhist128/256q, V6_vwhist128/256q_sat: ---10 -> --010
>
> Pre v68 compilers, by default, already use "0" for the non-specified bit
> that changed in v68, so unless someone is manually writing the binary
> encoding, this should not cause any backwards incompatibility with
> pre-v68 binaries.
>
> Signed-off-by: Matheus Tavares Bernardino <
> matheus.bernardino@oss.qualcomm.com>
> ---
> target/hexagon/imported/mmvec/encode_ext.def | 48 ++++++++++----------
> 1 file changed, 24 insertions(+), 24 deletions(-)
>
Reviewed-by: Taylor Simpson <ltaylorsimpson@gmail.com>
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next prev parent reply other threads:[~2026-03-23 19:22 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-23 13:15 [PATCH 00/13] hexagon: add missing HVX float instructions Matheus Tavares Bernardino
2026-03-23 13:15 ` [PATCH 01/13] tests/docker: Update hexagon cross toolchain to 22.1.0 Matheus Tavares Bernardino
2026-03-23 13:15 ` [PATCH 02/13] target/hexagon: fix incorrect/too-permissive HVX encodings Matheus Tavares Bernardino
2026-03-23 19:21 ` Taylor Simpson [this message]
2026-03-23 13:15 ` [PATCH 03/13] target/hexagon/cpu: add HVX IEEE FP extension Matheus Tavares Bernardino
2026-03-23 19:32 ` Taylor Simpson
2026-03-24 16:52 ` Matheus Bernardino
2026-03-24 18:48 ` Taylor Simpson
2026-03-24 19:20 ` Brian Cain
2026-03-24 19:46 ` Taylor Simpson
2026-03-23 13:15 ` [PATCH 04/13] target/hexagon: add v68 HVX IEEE float arithmetic insns Matheus Tavares Bernardino
2026-03-23 20:28 ` Taylor Simpson
2026-03-24 19:30 ` Matheus Bernardino
2026-03-24 19:51 ` Taylor Simpson
2026-03-24 19:59 ` Matheus Bernardino
2026-03-25 1:18 ` Taylor Simpson
2026-03-23 13:15 ` [PATCH 05/13] target/hexagon: add v68 HVX IEEE float min/max insns Matheus Tavares Bernardino
2026-03-23 20:47 ` Taylor Simpson
2026-03-24 20:15 ` Matheus Bernardino
2026-03-23 13:15 ` [PATCH 06/13] target/hexagon: add v68 HVX IEEE float misc insns Matheus Tavares Bernardino
2026-03-23 21:08 ` Taylor Simpson
2026-03-24 20:25 ` Matheus Bernardino
2026-03-23 13:15 ` [PATCH 07/13] target/hexagon: add v68 HVX IEEE float conversion insns Matheus Tavares Bernardino
2026-03-23 21:25 ` Taylor Simpson
2026-03-24 21:04 ` Matheus Bernardino
2026-03-25 1:15 ` Taylor Simpson
2026-03-23 13:15 ` [PATCH 08/13] target/hexagon: add v68 HVX IEEE float compare insns Matheus Tavares Bernardino
2026-03-23 21:42 ` Taylor Simpson
2026-03-26 13:00 ` Matheus Bernardino
2026-03-23 13:15 ` [PATCH 09/13] target/hexagon: add v73 HVX IEEE bfloat16 insns Matheus Tavares Bernardino
2026-03-23 22:03 ` Taylor Simpson
2026-03-23 13:15 ` [PATCH 10/13] tests/hexagon: add tests for v68 HVX IEEE float arithmetics Matheus Tavares Bernardino
2026-03-24 19:05 ` Taylor Simpson
2026-03-23 13:15 ` [PATCH 11/13] tests/hexagon: add tests for v68 HVX IEEE float min/max Matheus Tavares Bernardino
2026-03-24 19:07 ` Taylor Simpson
2026-03-23 13:15 ` [PATCH 12/13] tests/hexagon: add tests for v68 HVX IEEE float conversions Matheus Tavares Bernardino
2026-03-24 19:30 ` Taylor Simpson
2026-03-23 13:15 ` [PATCH 13/13] tests/hexagon: add tests for v68 HVX IEEE float comparisons Matheus Tavares Bernardino
2026-03-24 19:37 ` Taylor Simpson
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