Lines Matching +full:left +full:- +full:shifted

1 /* SPDX-License-Identifier: GPL-2.0 */
6  * Copy no more than COUNT bytes of the null-terminated string from
27  *	a2  = the number of full words left in COUNT
29  * Furthermore, v0, a3-a5, t11, and $at are untouched.
55 	lda	t2, -1		# e1    : build a mask against false zero
79 	   the end-of-count bit is set in t8 iff it applies.
107 	/* Add the end-of-count bit to the eos detection bitmask.  */
121 	/* Are source and destination co-aligned?  */
128 	srl	a2, 3, a2	# e0    : a2 = loop counter = (count - 1)/8
133 	/* We are co-aligned; take care of a partial first word.  */
143 /* The source and destination are not co-aligned.  Align the destination
155 	   t1 == the shifted low bits of the first source word
156 	   t6 == bytemask that is -1 in dest word bytes */
168 	lda	t6, -1		# e0    :
183 	extql	t2, a1, t1	# e0    : position hi-bits of lo word
185 	ldq_u	t2, 8(a1)	# e0    : read next high-order source word
187 	extqh	t2, a1, t0	# e0    : position lo-bits of hi word (stall)
200 	   t0 == the shifted low-order bits from the current source word
201 	   t1 == the shifted high-order bits from the previous source word
224 	   have one full and one partial word left to write out.
227 	   t0 == the shifted low-order bits from the current source word
228 	   t1 == the shifted high-order bits from the previous source word
236 	stq_u	t0, 0(a0)	# e0    : the null was in the high-order bits
268 	/* Got to end-of-count before end of string.  
270 	   t1 == the shifted high-order bits from the previous source word  */
285 $u_eocfin:			# end-of-count, final word
305 	lda	t6, -1		# .. e1 :
314 	lda	t2, -1		# e0    : for creating masks later
320 	or	t8, t10, t5	# .. e1 : test for end-of-count too