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Allowed old-style (K and R) function declarations to be fastcall.

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That lets them match old-style definitions.  It avoids "Type conflict" error messages.  It allows shorter function calls.

Fixed the types of some variables in "test/ref/otccex.c".  It avoids crashes on 64-bit Windows (32-bit Windows with 64-bit pointers).
This commit is contained in:
Greg King
2019-07-22 09:05:01 -04:00
parent cceffbdb8c
commit a0db846a97
7 changed files with 66 additions and 75 deletions
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12
doc/cc65-intern.sgml
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@@ -42,7 +42,7 @@ The standard compliant variations <tt/__cdecl__/ and <tt/__fastcall__/ are alway
If a function has a prototype, parameters are pushed to the C-stack as their respective types
(i.e. a <tt/char/ parameter will push 1 byte), but if a function has no prototype, default
promotions will apply. This means that with no prototype, <tt/char/ will be promoted
to <tt/int/ and be pushed as 2 bytes. K &amp; R style function prototypes may be used,
to <tt/int/ and be pushed as 2 bytes. "K &amp; R"-style forward declarations may be used,
but they will function the same as if no prototype was used.
<sect1>Prologue, before the function call<p>
@@ -61,8 +61,8 @@ The rightmost parameter will have the lowest address on the stack,
and multi-byte parameters will have their least significant byte at the lower address.
The <tt/sp/ pseudo-register is a zeropage pointer to the base of the C-stack.
If the function has no prototype or is variadic
the <tt/Y/ register will contain the number of bytes pushed to the stack for this function.
If the function is variadic, the <tt/Y/ register will contain the number of
bytes pushed to the stack for this function.
Example:
<tscreen><verb>
@@ -108,8 +108,9 @@ The C-stack pointer <tt/sp/ must be restored by the function to its value before
function call prologue. It may pop all of its parameters from the C-stack
(e.g. using the <tt/runtime/ function <tt/popa/),
or it could adjust <tt/sp/ directly.
If the function has no prototype, or is variadic the <tt/Y/ register contains the
number of bytes pushed to the stack on entry, which may be added to <tt/sp/ to restore its original state.
If the function is variadic, the <tt/Y/ register contains the number of bytes
pushed to the stack on entry, which may be added to <tt/sp/ to restore its
original state.
The internal pseudo-register <tt/regbank/ must not be changed by the function.
@@ -136,4 +137,3 @@ it may clobber any of these itself:
</article>