question: public void cast ( final Type from , final Type to ) { if ( from != to ) { if ( from == Type . DOUBLE_TYPE ) { if ( to == Type . FLOAT_TYPE ) { mv . visitInsn ( Opcodes . D2F ) ; } else if ( to == Type . LONG_TYPE ) { mv . visitInsn ( Opcodes . D2L ) ; } else { mv . visitInsn ( Opcodes . D2I ) ; cast ( Type . INT_TYPE , to ) ; } } else if ( from == Type . FLOAT_TYPE ) { if ( to == Type . DOUBLE_TYPE ) { mv . visitInsn ( Opcodes . F2D ) ; } else if ( to == Type . LONG_TYPE ) { mv . visitInsn ( Opcodes . F2L ) ; } else { mv . visitInsn ( Opcodes . F2I ) ; cast ( Type . INT_TYPE , to ) ; } } else if ( from == Type . LONG_TYPE ) { if ( to == Type . DOUBLE_TYPE ) { mv . visitInsn ( Opcodes . L2D ) ; } else if ( to == Type . FLOAT_TYPE ) { mv . visitInsn ( Opcodes . L2F ) ; } else { mv . visitInsn ( Opcodes . L2I ) ; cast ( Type . INT_TYPE , to ) ; } } else { if ( to == Type . BYTE_TYPE ) { mv . visitInsn ( Opcodes . I2B ) ; } else if ( to == Type . CHAR_TYPE ) { mv . visitInsn ( Opcodes . I2C ) ; } else if ( to == Type . DOUBLE_TYPE ) { mv . visitInsn ( Opcodes . I2D ) ; } else if ( to == Type . FLOAT_TYPE ) { mv . visitInsn ( Opcodes . I2F ) ; } else if ( to == Type . LONG_TYPE ) { mv . visitInsn ( Opcodes . I2L ) ; } else if ( to == Type . SHORT_TYPE ) { mv . visitInsn ( Opcodes . I2S ) ; } } } }
target:  Generates the instructions to cast a numerical value from one type to another.