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Re: [PATCH 16/33] target/ppc: Implement Vector Insert Word from GPR usin


From: Richard Henderson
Subject: Re: [PATCH 16/33] target/ppc: Implement Vector Insert Word from GPR using Immediate insns
Date: Tue, 26 Oct 2021 09:58:15 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0

On 10/26/21 7:33 AM, Matheus K. Ferst wrote:
It says that "if UIM is greater than N, the result is undefined." My first read was also that the outcome is "boundedly undefined," but I guess it can be understood as "the resulting value in VRT will be undefined" (like when the pseudo-code uses "VRT <- 0xUUUU_..._UUUU"), in which case this patch and Mambo are correct.

If the reference simulator is fine with it, I am too.

I'm just a bit disappointed with the laxness of the pseudocode -- they've got that 0xuuuu syntax elsewhere, but not here.


r~



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