ARM instructions -- CLZ

[Shaun Jackman <sjackman at pathwayconnect dot com>]

Does binutils support the ARM CLZ instruction?
I have an arm7tdmi and am compiling with -mcpu-arm7tdmi.

This is the macro I'm using...

#define count_leading_zeroes(a) \
({ uint32 __value, __arg = (a); \
    asm ("clz\t%0, %1": "=r" (__value): "r" (__arg)); \
    __value; })

and the C is...

unsigned count = count_leading_zeroes( num);

which produces the proper assembler (in the .s file compiling with -S)
	clz	r2, r3
(which makes sense in context)

Unfortunately, it's a big crash and burn.
/tmp/ccQbzMp6.s: Assembler messages:
/tmp/ccQbzMp6.s:17: Error: bad instruction `clz r2,r3'

Any thoughts?

Thanks,
Shaun Jackman


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