ARM Compiler toolchain v4.1 for µVision Using the Compiler

Compiler Coding Practices
5.69 long long data type in C99 and C90
C99 supports the integral data type long long. This type is 64 bits wide in the ARM compilation
tools. For example:
long long int j = 25902068371200;
// length of light day, meters
unsigned long long int i = 94607304725808000ULL; // length of light year, meters
long long is also available in C90 when not using --strict.
__int64 is a synonym for long long. __int64 is always available.
5.69.1 See also
Concepts
• New language features of C99 on page 5-77.
Reference
Compiler Reference:
• long long on page 4-6.
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