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Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder2.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> Newsgroups: comp.arch Subject: Re: Arm ldaxr / stxr loop question Date: Thu, 14 Nov 2024 14:21:32 -0800 Organization: A noiseless patient Spider Lines: 36 Message-ID: <vh5t5b$312cl$2@dont-email.me> References: <vfono1$14l9r$1@dont-email.me> <vgm4vj$3d2as$1@dont-email.me> <vgm5cb$3d2as$3@dont-email.me> <YfxXO.384093$EEm7.56154@fx16.iad> <vh4530$2mar5$1@dont-email.me> <-rKdnTO4LdoWXKj6nZ2dnZfqnPWdnZ2d@supernews.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Thu, 14 Nov 2024 23:21:32 +0100 (CET) Injection-Info: dont-email.me; posting-host="cc4ad05abd30e54c7e7c5dcd9d84dd23"; logging-data="3180949"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18JJyHl+TQp6zvsLeE29n982n7gOgKsMes=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:zt03U6Mgjo3QXjQPDTxpMcpFEQo= In-Reply-To: <-rKdnTO4LdoWXKj6nZ2dnZfqnPWdnZ2d@supernews.com> Content-Language: en-US Bytes: 2781 On 11/14/2024 1:23 AM, aph@littlepinkcloud.invalid wrote: > Kent Dickey <kegs@provalid.com> wrote: > >> Even better, let's look at the actual words for Pick Basic Dependency: >> >> --- >> Pick Basic Dependency: >> There is a Pick Basic dependency from an effect E1 to an effect >> E2 if one of the following applies: >> 1) One of the following applies: >> a) E1 is an Explicit Memory Read effect >> b) E1 is a Register Read effect >> 2) One of the following applies: >> a) There is a Pick dependency through registers and memory >> from E1 to E2 >> b) E1 and E2 are the same effect > > I don't understand this. However, here are the actual words: > > Pick Basic dependency > > A Pick Basic dependency from a read Register effect or read Memory > effect R1 to a Register effect or Memory effect E2 exists if one > of the following applies: > > • There is a Dependency through registers and memory from R1 to E2. > • There is an Intrinsic Control dependency from R1 to E2. > • There is a Pick Basic dependency from R1 to an Effect E3 and > there is a Pick Basic dependency from E3 to E2. > > Seems reasonable enough in context, no? It's either a data dependency, > a control dependency, or any transitive combination of them. data dependencies as in stronger than a Dec Alpha does not not honor data dependent loads?