<article>
<title>cc65 internals
<author><url url="mailto:bbbradsmith@users.noreply.github.com" name="Brad Smith">
-<date>2016-02-27
<abstract>
Internal details of cc65 code generation,
<item><tt/cdecl/ - passes all parameters on the C-stack.
<p>
<item><tt/fastcall/ - passes the rightmost parameter in
- registers <tt>A/X/sreg</tt> an all others on the C-stack.
+ registers <tt>A/X/sreg</tt> and all others on the C-stack.
<p>
</itemize>
the <tt>A/X/sreg</tt> registers:
<itemize>
- <item><tt/A/ - 8-bit parameter, or low byte of larger tyes<p>
+ <item><tt/A/ - 8-bit parameter, or low byte of larger types<p>
<item><tt/X/ - 16-bit high byte, or second byte of 32-bits<p>
<item><tt/sreg/ - Zeropage pseudo-register including high 2 bytes of 32-bit parameter<p>
</itemize>
Example:
<tscreen><verb>
// C prototype
-void foo(unsigned bar, unsigned char baz);
+void cdecl foo(unsigned bar, unsigned char baz);
; C-stack layout within the function:
;