SW500009 Microchip Technology, SW500009 Datasheet - Page 101

• Manufacturer Part Number: SW500009
• Description: HI-TECH FOR DSPIC/PIC24
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC24 & DsPICr

Specifications of SW500009

• Supported Families: PIC24
• Core Architecture: PIC, DsPIC
• Software Edition: Standard
• Kit Contents: Software And Docs
• Tool Type: Compiler
• Mcu Supported Families: PIC24 MCUs And DsPIC DSCs
• Lead Free Status / RoHS Status: Not applicable / RoHS Compliant
• For Use With/related Products: DSPIC3X/PIC24
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 025; 778-1003; 778-1003

Macro Assembler
4.3.5.1 Significance of Identifiers
Users of other assemblers that attempt to implement forms of data typing for identifiers should note
that this assembler attaches no significance to any symbol, and places no restrictions or expectations
on the usage of a symbol.
name spaces, but other than this, the assembler does not care whether a symbol is used to represent
bytes, words or sports cars. No special syntax is needed or provided to define the addresses of bits
or any other data type, nor will the assembler issue any warnings if a symbol is used in more than
one context. The instruction and addressing mode syntax provide all the information necessary for
the assembler to generate correct code.
4.3.5.2 Assembler-Generated Identifiers
Where a LOCAL directive is used in a macro block, the assembler will generate a unique symbol to
replace each specified identifier in each expansion of that macro. These unique symbols will have
the form ??nnnn where nnnn is a 4 digit number. The user should avoid defining symbols with the
same form.
4.3.5.3 Location Counter
The current location within the active program section is accessible via the symbol $. This symbol
expands to the address of the currently executing instruction. Thus:
will represent code that will jump to itself and form an endless loop. By using this symbol and an
offset, a relative jump destination to be specified.
number of instructions. For example:
will skip one instruction.
The names of psects (program sections) and ordinary symbols occupy separate, overlapping
The address represented by $ is a word address and thus any offset to this symbol represents a
$
?$_12345
goto $
goto $+1
movlw 8
movwf _foo
HI-TECH C Assembly Language
87