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File:  [DVB] / dietlibc / arm / __testandset.S
Revision 1.2: download - view: text, annotated - select for diffs
Sat Apr 19 15:07:32 2014 UTC (10 years, 1 month ago) by leitner
Branches: MAIN
CVS tags: HEAD
Massive ARM changes from Enrico Scholz

#include "arm-features.h"

FUNC_START	__testandset
	mov	r2, r0
	mov	r1, #1
# if __ARM_ARCH__ < 6
	swp	r0, r1, [r2]
# else
1:	ldrex	r0, [r2]
	strex	r3, r1, [r2]
	cmp	r3, #0
	bne	1b
# endif
	RET
FUNC_END	__testandset
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