MS/CW-style inline assembly for GCC

[Stan Shebs]

Richard Henderson wrote:

>On Tue, May 04, 2004 at 02:16:53PM -0700, Stan Shebs wrote:
>
>>>I presume you're also parsing the asm opcode to know what register
>>>class is needed at a particular point?
>>>
>>Well, no - so far the type of the variable has been sufficient to pick
>>a good register class.
>>
>
>Oh, really?  
>
>	int x, y;
>	asm {
>	  addi x, y, 3
>	};
>
>In this case Y must be class 'b', not class 'r'.  Unless you're going
>to just use 'b' all the time for integer types [...]
>
Exactamundo. :-) Sure some code could be slower because I always
use 'b' instead of choosing on a per-instruction-and-operand basis,
but I think it would take a pretty contrived example to get a
measurable speed hit.

Stan