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Added explanation for --codesize

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git-svn-id: svn://svn.cc65.org/cc65/trunk@753 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz 2001-05-24 08:26:43 +00:00
parent 1d458e9f33
commit dfeefd6f79
2 changed files with 14 additions and 4 deletions
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2
doc/Makefile
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@ -31,7 +31,7 @@ TEX = $(SGML:.sgml=.tex)
sgml2txt $<
%.html: %.sgml
sgml2html --split=1 $<
sgml2html --split=1 $<
%.info: %.sgml
sgml2info $<

16
doc/cc65.sgml
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@ -78,6 +78,7 @@ Long options:
--bss-name seg Set the name of the BSS segment
--check-stack Generate stack overflow checks
--code-name seg Set the name of the CODE segment
--codesize x Accept larger code by factor x
--cpu type Set cpu type
--data-name seg Set the name of the DATA segment
--debug Debug mode
@ -114,7 +115,7 @@ Here is a description of all the command line options:
<tag><tt>--check-stack</tt></tag>
Tells the compiler to generate code that checks for stack overflows. See
<tt><ref id="pragma-checkstack" name="#pragma checkstack"></tt> for an
explanation of this feature.
@ -125,8 +126,16 @@ Here is a description of all the command line options:
Set the name of the code segment.
<tag><tt>--cpu CPU</tt></tag>
<tag><tt>--codesize x</tt></tag>
This options allows finer control about speed vs. size decisions in the
code generation phase. It gives the allowed size increase factor (in
percent). The default is 100 when not using <tt/-Oi/ and 200 when using
<tt/-Oi/ (<tt/-Oi/ is the same as <tt/--codesize 200/).
<tag><tt>--cpu CPU</tt></tag>
A new, still experimental option. You may specify "6502" or "65C02" as
the CPU. 6502 is the default, so this will not change anything.
Specifying 65C02 will use a few 65C02 instructions when generating code.
@ -254,7 +263,8 @@ Here is a description of all the command line options:
Using <tt/-Oi/, the code generator will inline some code where otherwise a
runtime functions would have been called, even if the generated code is
larger. This will not only remove the overhead for a function call, but will
make the code visible for the optimizer.
make the code visible for the optimizer. <tt/-Oi/ is an alias for
<tt/--codesize 200/.
<tt/-Or/ will make the compiler honor the <tt/register/ keyword. Local
variables may be placed in registers (which are actually zero page