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Moved some Assembly function descriptions out of the "Control commands" section, and into the "Pseudo functions" section.
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Greg King
parent
080cb1bac9
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144
doc/ca65.sgml
144
doc/ca65.sgml
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@ -1353,15 +1353,15 @@ writable.
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<sect>Pseudo functions<label id="pseudo-functions"><p>
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Pseudo functions expect their arguments in parenthesis, and they have a result,
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either a string or an expression.
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Pseudo functions expect their arguments in parentheses, and they have a result,
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either a string or an expression value.
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<sect1><tt>.ADDRSIZE</tt><label id=".ADDRSIZE"><p>
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The <tt/.ADDRSIZE/ function is used to return the interal address size
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The <tt/.ADDRSIZE/ function is used to return the internal address size
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associated with a symbol. This can be helpful in macros when knowing the address
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size of symbol can help with custom instructions.
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size of a symbol can help with custom instructions.
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Example:
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@ -1389,7 +1389,7 @@ either a string or an expression.
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<sect1><tt>.BANK</tt><label id=".BANK"><p>
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The <tt/.BANK/ function is used to support systems with banked memory. The
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argument is an expression with exactly one segment reference - usually a
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argument is an expression with exactly one segment reference -- usually a
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label. The function result is the value of the <tt/bank/ attribute assigned
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to the run memory area of the segment. Please see the linker documentation
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for more information about memory areas and their attributes.
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@ -1397,13 +1397,13 @@ either a string or an expression.
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The value of <tt/.BANK/ can be used to switch memory so that a memory bank
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containing specific data is available.
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The <tt/bank/ attribute is a 32 bit integer and so is the result of the
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The <tt/bank/ attribute is a 32-bit integer, and so is the result of the
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<tt/.BANK/ function. You will have to use <tt><ref id=".LOBYTE"
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name=".LOBYTE"></tt> or similar functions to address just part of it.
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Please note that <tt/.BANK/ will always get evaluated in the link stage, so
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an expression containing <tt/.BANK/ can never be used where a constant known
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result is expected (for example with <tt/.RES/).
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Please note that <tt/.BANK/ always will get evaluated in the link stage, so
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an expression containing <tt/.BANK/ never can be used where a constant, known
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result is expected (for example, with <tt/.RES/).
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Example:
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@ -1440,7 +1440,7 @@ either a string or an expression.
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<sect1><tt>.BLANK</tt><label id=".BLANK"><p>
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Builtin function. The function evaluates its argument in braces and yields
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Builtin function. The function evaluates its argument in parentheses and yields
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"false" if the argument is non blank (there is an argument), and "true" if
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there is no argument. The token list that makes up the function argument
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may optionally be enclosed in curly braces. This allows the inclusion of
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@ -1479,7 +1479,7 @@ either a string or an expression.
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<sect1><tt>.CONST</tt><label id=".CONST"><p>
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Builtin function. The function evaluates its argument in braces and
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Builtin function. The function evaluates its argument in parentheses and
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yields "true" if the argument is a constant expression (that is, an
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expression that yields a constant value at assembly time) and "false"
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otherwise. As an example, the .IFCONST statement may be replaced by
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@ -1489,6 +1489,41 @@ either a string or an expression.
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</verb></tscreen>
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<sect1><tt>.DEF, .DEFINED</tt><label id=".DEFINED"><p>
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Builtin function. The function expects an identifier as argument in parentheses.
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The argument is evaluated, and the function yields "true" if the identifier
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is a symbol that already is defined somewhere in the source file up to the
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current position. Otherwise, the function yields false. As an example, the
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<tt><ref id=".IFDEF" name=".IFDEF"></tt> statement may be replaced by
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<tscreen><verb>
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.if .defined(a)
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</verb></tscreen>
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<sect1><tt>.DEFINEDMACRO</tt><label id=".DEFINEDMACRO"><p>
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Builtin function. The function expects an identifier as argument in parentheses.
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The argument is evaluated, and the function yields "true" if the identifier
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already has been defined as the name of a macro. Otherwise, the function yields
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false. Example:
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<tscreen><verb>
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.macro add foo
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clc
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adc foo
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.endmacro
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.if .definedmacro(add)
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add #$01
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.else
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clc
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adc #$01
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.endif
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</verb></tscreen>
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<sect1><tt>.HIBYTE</tt><label id=".HIBYTE"><p>
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The function returns the high byte (that is, bits 8-15) of its argument.
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@ -1525,6 +1560,23 @@ either a string or an expression.
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</verb></tscreen>
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<sect1><tt>.ISMNEM, .ISMNEMONIC</tt><label id=".ISMNEMONIC"><p>
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Builtin function. The function expects an identifier as argument in parentheses.
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The argument is evaluated, and the function yields "true" if the identifier
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is defined as an instruction mnemonic that is recognized by the assembler.
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Example:
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<tscreen><verb>
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.if .not .ismnemonic(ina)
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.macro ina
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clc
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adc #$01
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.endmacro
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.endif
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</verb></tscreen>
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<sect1><tt>.LEFT</tt><label id=".LEFT"><p>
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Builtin function. Extracts the left part of a given token list.
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@ -1719,7 +1771,7 @@ either a string or an expression.
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<sect1><tt>.REF, .REFERENCED</tt><label id=".REFERENCED"><p>
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Builtin function. The function expects an identifier as argument in braces.
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Builtin function. The function expects an identifier as argument in parentheses.
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The argument is evaluated, and the function yields "true" if the identifier
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is a symbol that has already been referenced somewhere in the source file up
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to the current position. Otherwise the function yields false. As an example,
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@ -1865,7 +1917,7 @@ either a string or an expression.
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<sect1><tt>.STRING</tt><label id=".STRING"><p>
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Builtin function. The function accepts an argument in braces and converts
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Builtin function. The function accepts an argument in parentheses and converts
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this argument into a string constant. The argument may be an identifier, or
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a constant numeric value.
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@ -1884,7 +1936,7 @@ either a string or an expression.
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<sect1><tt>.STRLEN</tt><label id=".STRLEN"><p>
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Builtin function. The function accepts a string argument in braces and
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Builtin function. The function accepts a string argument in parentheses and
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evaluates to the length of the string.
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Example:
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@ -1901,7 +1953,7 @@ either a string or an expression.
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<sect1><tt>.TCOUNT</tt><label id=".TCOUNT"><p>
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Builtin function. The function accepts a token list in braces. The function
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Builtin function. The function accepts a token list in parentheses. The function
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result is the number of tokens given as argument. The token list may
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optionally be enclosed into curly braces which are not considered part of
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the list and not counted. Enclosement in curly braces allows the inclusion
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@ -2366,7 +2418,7 @@ See: <tt><ref id=".ASCIIZ" name=".ASCIIZ"></tt>,<tt><ref id=".CHARMAP" name=".CH
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Start a define style macro definition. The command is followed by an
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identifier (the macro name) and optionally by a list of formal arguments
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in braces.
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in parentheses.
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Please note that <tt/.DEFINE/ shares most disadvantages with its C
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counterpart, so the general advice is, <bf/NOT/ do use <tt/.DEFINE/ if you
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@ -2390,41 +2442,6 @@ See: <tt><ref id=".ASCIIZ" name=".ASCIIZ"></tt>,<tt><ref id=".CHARMAP" name=".CH
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See also section <ref id="macros" name="Macros">.
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<sect1><tt>.DEF, .DEFINED</tt><label id=".DEFINED"><p>
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Builtin function. The function expects an identifier as argument in braces.
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The argument is evaluated, and the function yields "true" if the identifier
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is a symbol that is already defined somewhere in the source file up to the
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current position. Otherwise the function yields false. As an example, the
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<tt><ref id=".IFDEF" name=".IFDEF"></tt> statement may be replaced by
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<tscreen><verb>
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.if .defined(a)
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</verb></tscreen>
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<sect1><tt>.DEFINEDMACRO</tt><label id=".DEFINEDMACRO"><p>
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Builtin function. The function expects an identifier as argument in braces.
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The argument is evaluated, and the function yields "true" if the identifier
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has already been defined as the name of a macro. Otherwise the function yields
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false. Example:
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<tscreen><verb>
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.macro add foo
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clc
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adc foo
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.endmacro
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.if .definedmacro(add)
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add #$01
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.else
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clc
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adc #$01
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.endif
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</verb></tscreen>
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<sect1><tt>.DESTRUCTOR</tt><label id=".DESTRUCTOR"><p>
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Export a symbol and mark it as a module destructor. This may be used
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@ -3294,23 +3311,6 @@ See: <tt><ref id=".ASCIIZ" name=".ASCIIZ"></tt>,<tt><ref id=".CHARMAP" name=".CH
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the feature in more detail.
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<sect1><tt>.ISMNEM, .ISMNEMONIC</tt><label id=".ISMNEMONIC"><p>
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Builtin function. The function expects an identifier as argument in braces.
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The argument is evaluated, and the function yields "true" if the identifier
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is defined as an instruction mnemonic that is recognized by the assembler.
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Example:
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<tscreen><verb>
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.if .not .ismnemonic(ina)
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.macro ina
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clc
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adc #$01
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.endmacro
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.endif
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</verb></tscreen>
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<sect1><tt>.LINECONT</tt><label id=".LINECONT"><p>
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Switch on or off line continuations using the backslash character
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@ -4399,8 +4399,8 @@ different:
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For this macro type, the number of actual parameters must match
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exactly the number of formal parameters.
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To make this possible, formal parameters are enclosed in braces when
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defining the macro. If there are no parameters, the empty braces may
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To make this possible, formal parameters are enclosed in parentheses when
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defining the macro. If there are no parameters, the empty parentheses may
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be omitted.
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<item> Since <tt><ref id=".DEFINE" name=".DEFINE"></tt> style macros may not
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@ -4450,8 +4450,8 @@ Macros with parameters may also be useful:
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Note that, while formal parameters have to be placed in parentheses,
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the actual argument used when invoking the macro should not be.
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The invoked arguments are separated by commas only, if parentheses are
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used by accident they will become part of the replaced token.
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The invoked arguments are separated by commas only; if parentheses are
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used by accident, they will become part of the replaced token.
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If you wish to have an expression follow the macro invocation, the
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last parameter can be enclosed in curly braces {} to indicate the end of that
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