RealView Compilation Tools Compiler Reference Guide - ARM ...

Compiler-specific Features
Example
typedef struct s_foo { int i; short j; } foo;
typedef __packed struct s_bar { int i; short j; } bar;
return __ALIGNOF(struct s_foo); // returns 4
return __ALIGNOF(foo); // returns 4
return __ALIGNOF(bar); // returns 1
See also
• __alignof__ on page 4-3.
4.1.4 __asm
This keyword is used to pass information from the compiler to the ARM assembler
armasm.
The precise action of this keyword depends on its usage.
Usage
Embedded assembler
The __asm keyword can be used to declare or define an embedded
assembly function. For example:
__asm void my_strcpy(const char *src, char *dst);
See Embedded assembler on page 6-17 in the Compiler User Guide for
more information.
Inline assembler
The __asm keyword can be used to incorporate inline assembly into a
function. For example:
int qadd(int i, int j)
{
int res;
__asm
{
QADD res, i, j
}
return res;
}
SeeInline assembler on page 6-2 in the Compiler User Guide for more
information.
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