Statements

All internal assembly statements must follow this syntax:

  [LocalLabel:] (instruction | directive) [operands];  

Other rules for statements are:

• The assembly instructions are the standard Power Architecture instruction mnemonics.
• Each instruction must end with a newline character or a semicolon ( ;).
• Hexadecimal constants must be in C style: 0xABCDEF is a valid constant, but $ABCDEF is not.
• Assembler directives, instructions, and registers are not case-sensitive. To the inline assembler, these statements are the same:

  move.l   b, DO
  MOVE.L   b, d0
  

• To specify assembly-language interpretation for a block of code in your file, use the asm keyword.
  Note: To make sure that the C/C++ compiler recognizes the asm keyword, you must clear the ANSI Keywords Only checkbox of the C/C++ Language panel.

The following listings are valid examples of inline assembly code:

long int b;
struct mystruct {

  long int a;

} ;

static asm long f(void)     // Legal asm qualifier

{

  move.l   struct(mystruct.a)(A0),D0 // Accessing a struct.

  add.l    b,D0   // Using a global variable, put return value

                  // in D0.

  rts             // Return from the function:

                  // result = mystruct.a + b 

} 

long square(short a)
{

   asm {

     move.w  a,d0    // fetch function argument `a'

     mulu.w  d0,d0   // multiply

     return          // return from function (result is in D0)

   }

}