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Cx51 User's Guide
Cx51 Introduction Compiling Programs 
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Keywords Memory Areas Program Memory Internal Data Memory External Data Memory Far Memory SFR Memory Memory Models Small Model Compact Model Large Model Memory Types bdata code data far idata pdata xdata Data Types Special Function Registers sfr sfr16 sbit Bit-Addressable Objects bit Standard C Types void char int enum float double Type Modifiers signed unsigned short long Type Qualifiers const volatile Storage Classes auto register extern static Absolute Variable Location Pointers Generic Pointers Memory-Specific Pointers Pointer Conversions Abstract Pointers Function Declarations Parameters and the Stack Parameters and Registers Return Values Memory Models Register Banks Register Bank Access Interrupt Functions Reentrant Functions Alien (PL/M-51) Function Real-Time Function Tasks Preprocessor Advanced Programming 8051 Derivatives Error Messages Library Reference Appendixlong
The long type modifier specifies that an int variable uses more-than or the same amount of storage as an int type. It is used as follows:
<[>{signed|unsigned}<]> long <[>int<]> name <[>= value<]>;
Where
| name | is the name of the variable. |
| value | is the value to assign to the variable. |
Note
- The Cx51 Compiler allocates double the amount of storage for long types (4 bytes) as it does for int types (2 bytes).
Refer to 4-Byte Scalars for information regarding the format of long types.
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