Lines Matching +full:- +full:e
1 /* SPDX-License-Identifier: GPL-2.0 */
3 * arch/alpha/lib/ev6-stxncpy.S
4 * 21264 version contributed by Rick Gorton <rick.gorton@api-networks.com>
6 * Copy no more than COUNT bytes of the null-terminated string from
29 * Furthermore, v0, a3-a5, t11, and $at are untouched.
34 * ftp.digital.com/pub/Digital/info/semiconductor/literature/dsc-library.html
36 * E - either cluster
37 * U - upper subcluster; U0 - subcluster U0; U1 - subcluster U1
38 * L - lower subcluster; L0 - subcluster L0; L1 - subcluster L1
66 lda t2, -1 # E : build a mask against false zero
69 ornot t1, t2, t2 # E : (stall)
72 cmpbge zero, t2, t8 # E : bits set iff null found
73 or t0, t3, t0 # E : (stall)
91 addq a0, 8, a0 # E :
92 subq a2, 1, a2 # E :
96 addq a1, 8, a1 # E :
97 cmpbge zero, t0, t8 # E :
106 the end-of-count bit is set in t8 iff it applies.
113 negq t8, t12 # E : find low bit set
114 and t8, t12, t12 # E : (stall)
117 and t12, 0x80, t6 # E : (stall)
123 subq t12, 1, t6 # E :
124 or t12, t6, t8 # E : (stall)
137 /* Add the end-of-count bit to the eos detection bitmask. */
139 or t10, t8, t8 # E :
153 /* Are source and destination co-aligned? */
154 xor a0, a1, t1 # E :
155 and a0, 7, t0 # E : find dest misalignment
156 and t1, 7, t1 # E : (stall)
157 addq a2, t0, a2 # E : bias count by dest misalignment (stall)
159 subq a2, 1, a2 # E :
160 and a2, 7, t2 # E : (stall)
161 srl a2, 3, a2 # U : a2 = loop counter = (count - 1)/8 (stall)
162 addq zero, 1, t10 # E :
166 /* We are co-aligned; take care of a partial first word. */
168 addq a1, 8, a1 # E :
182 /* The source and destination are not co-aligned. Align the destination
195 t6 == bytemask that is -1 in dest word bytes */
198 addq a1, 8, a1 # E :
202 or t1, t4, t1 # E : first aligned src word complete (stall)
204 or t0, t1, t0 # E : first output word complete (stall)
205 or t0, t6, t6 # E : mask original data for zero test (stall)
207 cmpbge zero, t6, t8 # E :
209 lda t6, -1 # E :
215 or t6, t2, t2 # E : (stall)
217 cmpbge zero, t2, t8 # E : find nulls in second partial
218 addq a0, 8, a0 # E :
219 subq a2, 1, a2 # E :
224 extql t2, a1, t1 # U : position hi-bits of lo word
226 ldq_u t2, 8(a1) # L : read next high-order source word
227 addq a1, 8, a1 # E :
229 extqh t2, a1, t0 # U : position lo-bits of hi word (stall)
230 cmpbge zero, t2, t8 # E :
242 t0 == the shifted low-order bits from the current source word
243 t1 == the shifted high-order bits from the previous source word
250 or t0, t1, t0 # E : current dst word now complete
251 subq a2, 1, a2 # E : decrement word count
253 addq a0, 8, a0 # E :
255 stq_u t0, -8(a0) # U : save the current word
258 addq a1, 8, a1 # E :
261 cmpbge zero, t2, t8 # E : test new word for eos
271 t0 == the shifted low-order bits from the current source word
272 t1 == the shifted high-order bits from the previous source word
275 or t0, t1, t0 # E : first (partial) source word complete
277 cmpbge zero, t0, t8 # E : is the null in this first bit? (stall)
280 stq_u t0, 0(a0) # L : the null was in the high-order bits
281 addq a0, 8, a0 # E :
282 subq a2, 1, a2 # E :
287 cmpbge zero, t0, t8 # E :
288 or t8, t10, t6 # E : (stall)
289 cmoveq a2, t6, t8 # E : Latency=2, extra map slot (stall)
296 negq t8, t6 # E : isolate low bit set
297 and t6, t8, t12 # E : (stall)
298 and t12, 0x80, t6 # E : avoid dest word load if we can (stall)
302 subq t12, 1, t6 # E :
303 or t6, t12, t8 # E : (stall)
307 or t0, t1, t0 # E : (stall)
314 /* Got to end-of-count before end of string.
316 t1 == the shifted high-order bits from the previous source word */
318 and a1, 7, t6 # E : avoid final load if possible
320 and t6, 0xff, t6 # E : (stall)
326 or t1, t0, t1 # E : (stall)
328 1: cmpbge zero, t1, t8 # E :
329 mov t1, t0 # E :
331 $u_eocfin: # end-of-count, final word
332 or t10, t8, t8 # E :
340 and a0, 7, t4 # E : find dest misalignment
341 and a1, 7, t5 # E : find src misalignment
344 mov zero, t0 # E :
346 mov zero, t6 # E :
349 lda t6, -1 # E :
354 subq a1, t4, a1 # E : sub dest misalignment from src addr
359 1: cmplt t4, t5, t12 # E :
361 lda t2, -1 # E : for creating masks later
365 cmpbge zero, t1, t8 # E : is there a zero?
366 andnot t2, t6, t2 # E : dest mask for a single word copy
367 or t8, t10, t5 # E : test for end-of-count too
369 cmpbge zero, t2, t3 # E :
370 cmoveq a2, t5, t8 # E : Latency=2, extra map slot
371 nop # E : keep with cmoveq
372 andnot t8, t3, t8 # E : (stall)
380 negq t8, t6 # E : build bitmask of bytes <= zero
383 and t6, t8, t12 # E :
384 subq t12, 1, t6 # E : (stall)
385 or t6, t12, t8 # E : (stall)
389 andnot t0, t2, t0 # E : zero place for source to reside
390 or t0, t1, t0 # E : and put it there (stall both t0, t1)