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- Newsgroups: comp.arch
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!bogus.sura.net!pandora.pix.com!stripes
- From: stripes@pix.com (Josh Osborne)
- Subject: Re: Any new instructions in a i486?
- Message-ID: <Bzn2Ay.EGz@pix.com>
- Sender: news@pix.com (The News Subsystem)
- Nntp-Posting-Host: pandora.pix.com
- Organization: Pix Technologies -- The company with no adult supervision
- References: <PCG.92Dec19162224@decb.aber.ac.uk> <BzMEIJ.Anz@pix.com> <WAYNE.92Dec21153140@backbone.uucp>
- Date: Tue, 22 Dec 1992 02:16:09 GMT
- Lines: 35
-
- In article <WAYNE.92Dec21153140@backbone.uucp> wayne@backbone.uucp (Wayne Schlitt) writes:
- [...I wrote I think the cy486 is slower, but I would like to be wrong...]
- [...]
- >< Intel 486SX: [...]
- >< Instructions that can be executed in 1 clock cycle if the
- >< destination is a register and the source is either a register
- >< or an immediate value:
- >< ADC,ADD,AND,BSWAP,CMP,DEC,INC,MOV,NEG,NOT,OR,POP,PUSH,SBB,
- >< SUB,TEST,XOR
- ><
- >< Cyrix 486DLC [...]
- >< Instructions that can be executed in 1 clock cycle
- >< if the destination is a register and the source is
- >< either a register or an immediate value:
- >< ADC,ADD,AND,CDQ,CLC,CLD,CMC,CMP,CWD,DEC,INC,MOV,MOVSX,
- >< NEG, NOT,OR,SBB,SHLD,SHRD,STC,STD,SUB,TEST,XOR
- >
- >So, for most instructructions that the Intel 486 executes in 1 cycle,
- >the cyrix 486 does also. There are some things that take longer,
- >there are some things that take less time.
-
- Most impressave. Ok, I'm enjoying being wrong. That's what I get for
- beleving things I read in Computer Shopper...
-
- >I haven't seen any SPEC*92 info on the Cyrix, but it is my
- >understanding that they are about 10% slower than intel's parts at the
- >same clock speed.
-
- But most likely quite a bit faster at the same price :-)
- --
- stripes@pix.com "Security for Unix is like
- Josh_Osborne@Real_World,The Multitasking for MS-DOS"
- "The dyslexic porgramer" - Kevin Lockwood
- We all agree on the necessity of compromise. We just can't agree on
- when it's necessary to compromise. - Larry Wall
-