Referring to Assembly, C, and C++ Variables

The compiler's inline assembler has access to the local and global variables declared in C or C++ source code. The assembler also allows access to members of array, struct , and class objects:

• Using Local Variables and Arguments
  Using local variables and arguments.
• Creating a Stack Frame
  Creating stack frame.
• Referring to Variables in Instruction Operands
  Referring to variables in instruction operands.
• Referring to Variables in Memory
  Referring to variable in memory.
• Referring to Registers
  For a register operand, you must use one of the register names of the appropriate kind for the instruction.
• Referring to Labels
  For a label operand, you can use the name of a label.
• Using Variable Names as Memory Locations
  Whenever an instruction, such as a load instruction, a store instruction, or la , requires a memory location, you can use a local or global variable name.
• Using Immediate Operands
  For an immediate operand, you can use an integer or enum constant, sizeof expression, and any constant expression using any of the C dyadic and monadic arithmetic operators.