lib1funcs.asm (udivdi3): Make first divide step produce a 32 bit result before normal...

lib1funcs.asm (udivdi3): Make first divide step produce a 32 bit result before normalization...

	* config/sh/lib1funcs.asm (udivdi3): Make first divide step
	produce a 32 bit result before normalization, then normalize with a
	left shift.  Compute approximative error of 2nd reciprocal
	approximation in 2's complement.  Fix mask generation from upper
	longword of second divide stage result.
	For large divisor, fix shift count used to truncate first stage
	divide result; make decision if to adjust upwards based on comparison
	of higher parts of normalized values.
	(udivdi): Likewise.  Undo normalization of result for large divisor
	case.

From-SVN: r54993