Constraints for asm Operands

Contents|Index|Previous|Next
Constraints for `asm` operands

See the following documentation for specific details on what constraint letters you can use with asm operands. Constraints can say whether an operand may be in a register, and which kinds of register; whether the operand can be a memory reference, and which kinds of address; whether the operand may be an immediate constant, and which possible values it may have. Constraints can also require two operands to match.

- Simple constraints
- Multiple alternative constraints
- Constraint modifier characters
- Constraints for particular machines