ARM Compiler toolchain v4.1 for µVision Using the Compiler

Using the Inline and Embedded Assemblers of the ARM Compiler
7.5 Inline assembly language syntax with the asm keyword in C++
When compiling C++, the compiler supports the asm syntax proposed in the ISO C++ Standard.
You can specify inline assembler code using the following formats:
• On a single line, for example:
asm("instruction[;instruction]");
asm{instruction[;instruction]}
You cannot include comments.
• Using multiple adjacent strings, for example:
asm("ADD x, x, #1\n"
"MOV y, x\n");
This enables you to use macros to generate inline assembly, for example:
#define ADDLSL(x, y, shift) asm ("ADD " #x ", " #y ", LSL " #shift)
• On multiple lines, for example:
asm
{
...
instruction
...
}
You can use C or C++ comments anywhere in an inline assembly language block.
You can use an asm statement wherever a statement is expected.
7.5.1 See also
Concepts
• Inline assembler rules for compiler keywords __asm and asm on page 7-9
• Inline assembler support in the compiler on page 7-5.
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