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Article #10580Re: skip instructions
From: "BOB requires a human host! He f...
Date: Fri, 03 May 1991 21:32
Date: Fri, 03 May 1991 21:32
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In article <1182@opus.NMSU.Edu> jthomas@nmsu.edu (James Thomas) writes: >Is there a reference (or more) describing why SKIP instructions have mostly >disappeared from instruction sets? The 704x and 709x had them, so the >PDP-6 had them (and maybe therefore the PDP-8 inherited them). Now the >HP-PA has them hiding in the guise of the nullify bit. Are conditional >branches generically more useful? SPARC also has them, in the guise of annulled branches. In current implementations they're no faster than any other branch, and I don't think the Sun compilers make an effort to use them. -- David DiGiacomo, MIPS Computer Systems, Sunnyvale, CA dd@mips.com
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From: dd@mips.com ("BOB requires a human host! He feeds on fear... and the pleasures.")
Newsgroups: comp.arch
Subject: Re: skip instructions
Message-ID: <3027@spim.mips.COM>
Date: 3 May 91 21:32:47 GMT
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