operator-opattr.md

Asmc Macro Assembler Reference

operator OPATTR

OPATTR expression

The OPATTR operator returns a one-word constant defining the mode and scope of expression. If expression is not valid or is forward referenced, OPATTR returns a 0. If expression is valid, a nonrelocatable word is returned. The .TYPE operator returns only the low byte (bits 0-7) of the OPATTR operator and is included for compatibility with previous versions of the assembler.

Bit       Set If
Position  expression

 0        References a code label
 1        Is a memory expression or has a relocatable data label
 2        Is an immediate expression
 3        Uses direct memory addressing
 4        Is a register expression
 5        References no undefined symbols and is without error
 6        Is an SS-relative memory expression
 7        References an external label
 8-12     Language type:

          Bits     Language

          0000     No language type
          0001     C
          0010     SYSCALL
          0011     STDCALL
          0100     Pascal
          0101     FORTRAN
          0110     Basic
          0111     FASTCALL
          1000     VECTORCALL
          1001     WATCALL

15        Is signed

Bit 13 and 14 are undefined and reserved for future expansion.

See Also

Type | Operators Reference