Imagecraft c compiler and development environment for the atmel avr

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ICCV8 for AVR – C Compiler for Atmel AVREnds a function section. The is the address beyond the last instruction ofthe function. To access the function return sequence, see BLOCKEND below.DEFGLOBAL Defines a file-scoped global symbol.DEFSTATIC Defines a file-scoped global symbol.START Specifies the address of the __start symbol, which is usually the startingaddress of an ImageCraft generated program.Function-Level Commands BLOCK Starts a block in which symbols may be defined. All DEFLOCAL and DEFREGcommands must come after a BLOCK command. In the current version, there isonly one group of BLOCK/BLOCKEND command per function and all localvariables are declared in this block, even if they are declared in an inner block inthe source code. (This will be remedied in a future version of the compiler anddebug format. See “Future Enhancements” below.)The and are exactly the same as the ones specified in theLINE command that follows it. BLOCKEND Ends a symbol-scoped block. The and are exactly the sameas the ones specified in the LINE command that follows it.A special case is when is 0 (and this would be the last BLOCKEND inthe function). In this case, the function return sequence starts at this -note that ImageCraft compiler generates only one return sequence per function. LINE Defines a line number and its code address. DEFLOCAL Defines a function-scoped symbol. is a decimal offset, usually from theframe pointer. DEFREG 194
ICCV8 for AVR – C Compiler for Atmel AVRDefines a register variable. is a target-specific register name. Currentlyonly applicable for the AVR and the Cortex-M compilers.DEFREG register name is a decimal integer corresponding to the register number.The variable may occupy more than one register depending on the data type.Consecutive registers are used in that case. For example:DEFREG n 4 ideclares “n” as a register integer variable, occupying R4 and R5.STACK Used only by the HC11 compiler. See below.DEFSTATIC Defines a function-scoped static symbol.DEFGLOBAL Defines a global symbol.Structure Declaration STRUCT/UNION Starts a structure or union declaration. is the total size of the structure inbytes. is the structure tag name. If this structure has no tag in the sourcefile, a unique name of the form . (dot followed by a number) will beused. The . is unique within a file scope as delimited by the FILEcommand, and may be reused in other FILE units.If the is 0, this signifies a structure that is not defined in this FILE unit.For example, the following C fragment:struct bar { struct foo *p; struct bar *x; } bar;outputs a STRUCT command with equal to 0 for the structure tag foo ifthe structure is not defined prior to the declaration. A STRUCTEND/UNIONENDcommand must close off a STRUCT/UNION command. Nested declaration is notused.The STRUCT/UNION commands appear either at the file or function / block scope,depending on the scope in the original C source. All data type references tostructures use the structure tag name . FIELD 195
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Imagecraft c compiler and development environment for the atmel avr

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