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Re: [PATCH v6 77/82] target/arm: Fix decode for VDOT (indexed)

From: Richard Henderson
Subject: Re: [PATCH v6 77/82] target/arm: Fix decode for VDOT (indexed)
Date: Sat, 15 May 2021 12:13:37 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 
On 5/13/21 2:25 PM, Peter Maydell wrote:

-VDOT_scalar    1111 1110 0 . 10 .... .... 1101 . q:1 index:1 u:1 rm:4 \
-               vm=%vm_dp vn=%vn_dp vd=%vd_dp
+VDOT_scalar    1111 1110 0 . 10 .... .... 1101 . q:1 index:1 u:1 vm:4 \
+               vn=%vn_dp vd=%vd_dp


Is it possible to make this kind of bug a decodetree error?
It seems unlikely that there's a use for having a bit which is
decoded both by a %foo field specification and also in some
other way...
That's not what's happening here. This has separate fields "rm" and "vm" decoded in different ways. 


r~
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