* config/bfin/bfin.h (enum reg_class, REG_CLASS_CONTENTS,
	REG_CLASS_NAMES): Add P0REGS.
	(REGNO_REG_CLASS): Return it where appropriate.
	(REG_CLASS_FROM_CONSTRAINT): Add 'qA'.
	(CLASS_LIKELY_SPILLED_P): P0REGS is likely_spilled.
	* doc/md.texi (Blackfin family): Document 'q' constraints.

From-SVN: r128397