Article View: net.arch
Article #2627Re: What's RISC all about ... REALLY?
From: gooley
Date: Sat, 05 Jul 1986 14:14
Date: Sat, 05 Jul 1986 14:14
10 lines
1063 bytes
1063 bytes
My guess is that the polynomial-evaluation instructions have some hardware support on the bigger VAXen (my unreliable memory tells me that the VAX FPA provides some in addition to doing the FP arithmetic), and so might be faster than the unrolled-loop user-programmed versions. On the 750, such instructions are done in microcode -- but that doesn't explain why they are so very slow. DEC would have to provide them for compatibility with machines on which they make more sense... !uiucdcs!uicsl!gooley
Technical Details
Message-ID:
<2300003@uicsl>Path:
arc1-ca.pugleaf.net!utzoo!watmath!clyde!cbatt!cbosgd!ihnp4!inuxc!pur-ee!uiucdcs!uicsl!gooleyReferences:
<475@elmgate.UUCP>Show Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!cbatt!cbosgd!ihnp4!inuxc!pur-ee!uiucdcs!uicsl!gooley From: gooley@uicsl.UUCP Newsgroups: net.arch Subject: Re: What's RISC all about ... REALLY? Message-ID: <2300003@uicsl> Date: Sat, 5-Jul-86 10:14:00 EDT Article-I.D.: uicsl.2300003 Posted: Sat Jul 5 10:14:00 1986 Date-Received: Mon, 7-Jul-86 01:17:00 EDT References: <475@elmgate.UUCP> Lines: 10 Nf-ID: #R:elmgate.UUCP:475:uicsl:2300003:000:506 Nf-From: uicsl.UUCP!gooley Jul 5 09:14:00 1986