F.1 Storage Allocation

The following table shows the data types and how they are represented. Sizes are in bytes.

Note - Storage allocated on the stack (identifiers with internal, or automatic, linkage) should be limited to 2 gigabytes or less.

Table F-1 Storage Allocation for Data Types

C Type	LP64 (-m64) size	LP64 alignment	ILP32 (-m32) size	ILP 32 alignment
Integer
`_Bool` `char` `signed char` `unsigned char`	1	1	1	1
`short` `signed short` `unsigned short`	2	2	2	2
`int` `signed int` `unsigned int` `enum`	4	4	4	4
`long` `signed long` `unsigned long`	8	8	4	4
`long long` `signed long long` `unsigned long long`	8	8	8	4 (x86) / 8 (SPARC)
Pointer
`any-type` * `any-type` `(*) ()`	8	8	4	4
Floating Point
`float` `double` `long double`	4 8 16	4 8 16	4 8 12 (x86) / 16 (SPARC)	4 4 (x86) / 8 (SPARC) 4 (x86) / 8 (SPARC)
Complex
`float _Complex` `double _Complex` `long double _Complex`	8 16 32	4 8 16	8 16 24 (x86) / 32 (SPARC)	4 4 (x86) / 8 (SPARC) 4 (x86) / 16 (SPARC)
Imaginary
`float _Imaginary` `double _Imaginary` `long double _Imaginary`	4 8 16	4 8 16	4 8 12 (x86) / 16 (SPARC)	4 4 (x86) / 8 (SPARC) 4 (x86) / 16 (SPARC)

Skip Navigation Links
Exit Print View
	Oracle Solaris Studio 12.3: C User's Guide Oracle Solaris Studio 12.3 Information Library