Re: How many x86 instructions?

Date	2014-02-21 14:15 -0500
From	Yousuf Khan <bbbl67@spammenot.yahoo.com>
Newsgroups	comp.sys.intel, comp.sys.ibm.pc.hardware.chips, alt.windows7.general
Subject	Re: How many x86 instructions?
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Message-ID	<5307a5d9$1@news.bnb-lp.com> (permalink)
Organization	Send abuse or DMCA complaints to abuse@bnb-lp.com

Cross-posted to 3 groups.

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On 21/02/2014 9:23 AM, Robert Redelmeier wrote:
> In comp.sys.ibm.pc.hardware.chips Yousuf Khan <bbbl67@spammenot.yahoo.com> wrote in part:
>> But it goes to show why the age of compilers is well and
>> truly upon us, there's no human way to keep track of these
>> machine language instructions. Compilers just use a subset,
>> and just repeat those instructions over and over again.
>
> Hate to break it to you, but you are behind the times.  Compilers
> are passe' -- "modern" systems use interpreters like JIT Java.
>
> How else you you think Android gets Apps to run on the dogs-breakfast
> of ARM processors out there?  It is [nearly] all interpreted Java.
> So much so that Dell can get 'roid Apps to run on its x86 tablet!
> (AFAIK, iOS still runs compiled Apps prob'cuz Apple _hatez_ Oracle)

Apparently, even Java byte code is compiled before it is run on a 
different type of virtual machine than its own Java VM. Can't use Java 
directly on Android:

"There is no Java Virtual Machine in the Android platform. Java bytecode 
is not executed. Instead Java classes are compiled into a proprietary 
bytecode format and run on Dalvik, a specialized virtual machine (VM) 
designed specifically for Android. Unlike Java VMs, which are stack 
machines, the Dalvik VM is a register-based architecture.

Because the bytecode loaded by the Dalvik virtual machine is not Java 
bytecode, and of the specific way Dalvik load classes, it is not 
possible to load Java libraries packages as jar files, and even a 
specific logic must be used to load Android libraries (specifically the 
content of the underlying dex file must be copied in the application 
private internal storage area, before being able to be loaded).[2]"

Comparison of Java and Android API - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Comparison_of_Java_and_Android_API

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How many x86 instructions? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2014-02-20 18:26 -0500
  Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-20 17:19 -0800
    Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-20 17:26 -0800
      Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-20 17:29 -0800
    Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-20 17:35 -0800
    Re: How many x86 instructions? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2014-02-20 21:33 -0500
      Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-20 19:46 -0800
      Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-20 20:02 -0800
      Re: How many x86 instructions? Paul <nospam@needed.com> - 2014-02-20 23:21 -0500
        Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-20 21:23 -0800
        Re: How many x86 instructions? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2014-02-21 00:55 -0500
          Re: How many x86 instructions? "Stanley Daniel de Liver" <admin@127.0.0.1> - 2014-04-25 10:54 +0100
            Re: How many x86 instructions? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2014-04-25 20:58 -0400
              Re: How many x86 instructions? "Stanley Daniel de Liver" <admin@127.0.0.1> - 2014-04-26 11:29 +0100
      Re: How many x86 instructions? Robert Redelmeier <redelm@ev1.net.invalid> - 2014-02-21 14:23 +0000
        Re: How many x86 instructions? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2014-02-21 14:15 -0500
          Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-21 11:34 -0800
            Re: How many x86 instructions? charlie <cdknospam@msn.com> - 2014-02-23 10:14 -0500
              Re: How many x86 instructions? "J. P. Gilliver (John)" <G6JPG@soft255.demon.co.uk> - 2014-02-23 16:37 +0000
                Re: How many x86 instructions? charlie <cdknospam@msn.com> - 2014-02-23 17:41 -0500
                Re: How many x86 instructions? BillW50 <BillW50@aol.kom> - 2014-02-23 17:15 -0600
                Re: How many x86 instructions? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2014-02-23 19:30 -0500
                Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-24 12:11 -0800
                Re: How many x86 instructions? Jason <jason_warren@ieee.org> - 2014-02-24 18:41 -0500
                Re: How many x86 instructions? krw@attt.bizz - 2014-02-23 19:34 -0500
                Re: How many x86 instructions? charlie <cdknospam@msn.com> - 2014-02-24 04:42 -0500
                Re: How many x86 instructions? Gene E. Bloch <blochxxxx@someplace.invalid> - 2014-02-23 15:45 -0800
                Re: How many x86 instructions? BillW50 <BillW50@aol.kom> - 2014-02-23 17:49 -0600
          Re: How many x86 instructions? Char Jackson <none@none.invalid> - 2014-02-21 19:03 -0600
          Re: How many x86 instructions? Robert Redelmeier <redelm@ev1.net.invalid> - 2014-02-22 02:16 +0000
            Re: How many x86 instructions? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2014-02-21 21:32 -0500
        Re: How many x86 instructions? Jason <jason_warren@ieee.org> - 2014-02-23 23:21 -0500
          Re: How many x86 instructions? krw@attt.bizz - 2014-02-24 13:02 -0500
            Re: How many x86 instructions? Jason <jason_warren@ieee.org> - 2014-02-24 13:38 -0500
              Re: How many x86 instructions? krw@attt.bizz - 2014-02-24 14:09 -0500
                Re: How many x86 instructions? Jason <jason_warren@ieee.org> - 2014-02-24 16:35 -0500
            Re: How many x86 instructions? pedro1492@lycos.com - 2014-03-28 19:50 -0700
              Re: How many x86 instructions? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2014-04-02 09:47 -0400
          Re: How many x86 instructions? Robert Redelmeier <redelm@ev1.net.invalid> - 2014-02-25 00:35 +0000
            Re: How many x86 instructions? John Doe <jdoe@usenetlove.invalid> - 2014-04-25 03:33 +0000
  Re: How many x86 instructions? "Jim" <gtfo@stfu.invalid> - 2014-02-27 01:28 -0500

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