英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

XPL    
A small dialect of {PL/I} used for compiler writing from
Stanford, 1967-69. XPL has
one-dimensional {arrays}. I/O is achieved with character
pseudo-variable INPUT and OUTPUT, e.g.

OUTPUT = 'This is a line';

It has inline {machine code}. "Programmers are given all the
rope they ask for. Novices tend to hang themselves fairly
frequently." XPL has been implemented on {IBM 360}, {Univac
1100}, {ICL System 4}, {CDC 6000} and {Cyber} series, {XDS
Sigma-5} and {Sigma-7} and {DEC} {PDP-10}.

An optimising XPL compiler (version 1) by Robin Vowels
is a standard implementation of XPL
and is based on McKeeman, Horning, and Wortman's improved
{XCOM} (which employs hashed symbol table generation). It
includes the extra built-in function COREHALFWORD.

The following areas have been optimised: procedures calls when
the argument and corresponding parameter are of the same type,
and when the argument is a constant; constant subscripts; use
of CORELHALFWORD and COREWORD; string constants of length one;
iterative DO statements by transferring code to the end of the
loop.

String constants of length one do not require a descriptor,
hence more descriptors are available for string variables.
Comparison operations are treated as commutative, and an
improved Commute algorithm is used. Halfword instructions are
generated for BIT(16) variables.

These areas have been improved or re-written: calls on OUTPUT,
catenation, integer-to-string conversion, multiply, divide,
and MOD. An emitter for SS-type instructions has been added.
The compiler achieves an 11% reduction in object code
compiling itself, an 11% increase in compilation rate, a 55%
increase in compilation speed when the $E toggle is set.
Special treatment for catenating a string to an integer
substantially decreases consumption of the free string area,
and decreases string moves. The latter improvement is most
noticeable on small core machines.

Core requirements: less than the improved XCOM on which it is
based (approx. 98000 bytes). Symbol table size is 468.
Ported to {IBM} {System 370}. The compiler is written in XPL.
The code generators are machine-specific.

["A Compiler Generator," W.M. McKeeman et al, P-H 1970].

[JCC, AFIPS 1968].

(1993-08-07)


请选择你想看的字典辞典:
单词字典翻译
XPL查看 XPL 在百度字典中的解释百度英翻中〔查看〕
XPL查看 XPL 在Google字典中的解释Google英翻中〔查看〕
XPL查看 XPL 在Yahoo字典中的解释Yahoo英翻中〔查看〕





安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • . xpl files - X-Plane Developers and Plugins - X-Plane. Org Forum
    12k 1 Solutions 226 Location: Kinghorn, Scotland Interests:Computer Programming, Flight Simulators, Photography, Walking, Playing Musical Instruments OS: Multiple (Windows Mac Linux) X-Plane since : v5 or earlier
  • How do I amend the contents of an . XPL file? - X-Plane. Org Forum
    I want to amend the a plugin Essentially I just want to change the rating scale a plugin uses, but I can't figure out how to open the XPL file
  • Replaced or Obsolete Datarefs - X-Plane. Org Forum
    @zibo, I just noticed this in my X-Plane log after my latest flight While it doesn't affect the simulation and flight, it is something to be aware of I am running the latest X-Plane (12 1 3-b3) and Zibo (4 03 06) 0:00:00 000 I LUA: Running scripts B738 anav B738 anav lua [xlua win_x64 xlua xpl
  • X-Plane 12 - X-Plane. Org Forum
    Sunday 22nd March - Weekly Digest Prize Results Forums
  • AviTab Browser: A web browser addon for the AviTab plugin
    AviTab BrowserThe AviTab browser plugin is a browser that lets you browse the internet using your AviTab and will integrate with about every plane tablet resolution, as long as there is an AviTab json present in the airplane directory The browser works with every AviTab, but there is a special
  • LiveTraffic - Utilities - X-Plane. Org Forum
    LiveTraffic fills your sky with live air traffic based on public tracking data requested from adsb fi, OpenSky Network, Open Glider Network, ASDBHub, ADS-B Exchange, RealTraffic, FSCharter v2, SayIntentions and or AutoATC AI planes It is compatible with X-Plane 11 and 12 on Windows, Mac and Linux
  • Updates - X-Plane. Org Software Store
    Stay updated with the latest software updates and features from X-Plane Org Software Store
  • R2_Library - Scenery Development Forum - X-Plane. Org Forum
    I've just returned to X-plane and want to download some of the old scenery packages that I used to use, however I can't find the R2_Library which some of the custom scenery packages use Does anyone have a link to it please?
  • XPUIPC - how to edit . XPL file - X-Plane. Org Forum
    Hi all, Need some help pls I have to edit my IP adress in XPUIPC, and can only do that within the XPL-file in the folder However, cant seem to open that XPL file nor edit it - does anyone know how to fix this? Which program should I use to edit XPL files? Your help much appreciated, thx!
  • XPL-TaxiSign Generator Viewer - Utilities - X-Plane. Org Forum
    XPL TaxiSign Generator Viewer is a Web Based Tool to aid on the Creation of Taxisigns for X-plane V9 V10 Create and preview your taxisigns with a click of your mouse and copy the generated code for use on WED, or to add it manually to your APT dat files





中文字典-英文字典  2005-2009