Mercurial > hg > index.cgi

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Cycle Counts</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="LW Tool Chain"
HREF="index.html"><LINK
REL="UP"
TITLE="LWASM"
HREF="c62.html"><LINK
REL="PREVIOUS"
TITLE="Convenience Instructions"
HREF="x795.html"><LINK
REL="NEXT"
TITLE="LWLINK"
HREF="c806.html"></HEAD
><BODY
CLASS="SECTION"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>LW Tool Chain</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="x795.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Chapter 3. LWASM</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="c806.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECTION"
><H1
CLASS="SECTION"
><A
NAME="AEN800"
>3.12. Cycle Counts</A
></H1
><P
>&#13;The following options for displaying cycle counts in listings are provided.
These options are enabled from pragmas on the command line or in the
assembly files themselves.  For compatibility with other assemblers you can
use the "OPT" keyword in addition to "PRAGMA."</P
><PRE
CLASS="PROGRAMLISTING"
>opt c  - enable cycle counts: [8]
opt cd - enable detailed cycle counts breaking down addressing modes: [5+3]
opt ct - show a running subtotal of cycles
opt cc - clear the running subtotal</PRE
><P
>&#13;The assembler supports both 6809 as well as native-mode 6309 cycle counts.
In 6309 mode the counts are displayed in parenthesis instead of brackets.
In addition, some operations have a variable cycle count.  In this case a
"+?" is displayed to alert the reader.  Sample output is shown below.</P
><PRE
CLASS="PROGRAMLISTING"
>266f 7d25e2     (window.asm):00313 [7]     7       move   tst   putflg
2672 2602       (window.asm):00314 [5]     12             bne   a@
2674 1e13       (window.asm):00315 [8]     20             exg   x,u
2676 0dd6       (window.asm):00316 [6]     26      a@     tst   is6309
2678 2618       (window.asm):00317 [5]     31             bne   exit@
                (window.asm):00318                        opt   6309
267a 10860085   (window.asm):00319 (4)     35      b@     ldw   #133
267e 113813     (window.asm):00320 (6+?)   41             tfm   x+,u+
2681 30881b     (window.asm):00321 (4+1)   46             leax  27,x
2684 33c81b     (window.asm):00322 (4+1)   51             leau  27,u
2687 4a         (window.asm):00323 (1)     52             deca
2688 26f0       (window.asm):00324 (5)     57             bne   b@</PRE
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="x795.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="c806.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Convenience Instructions</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="c62.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>LWLINK</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
author	William Astle <lost@l-w.ca>
date	Thu, 24 Mar 2016 20:07:20 -0600
parents	fc166b3bbae3
children	cad5937314cb