Lines Matching +full:4 +full:- +full:16
1 /* SPDX-License-Identifier: GPL-2.0 */
3 * arch/alpha/lib/ev6-memcpy.S
4 * 21264 version by Rick Gorton <rick.gorton@alpha-processor.com>
8 * - memory accessed as aligned quadwords only
9 * - uses bcmpge to compare 8 bytes in parallel
14 * ftp.digital.com/pub/Digital/info/semiconductor/literature/dsc-library.html
16 * E - either cluster
17 * U - upper subcluster; U0 - subcluster U0; U1 - subcluster U1
18 * L - lower subcluster; L0 - subcluster L0; L1 - subcluster L1
21 * $1,$2, - scratch
27 .align 4
34 mov $16, $0 # E : copy dest to return
36 xor $16, $17, $1 # E : are source and dest alignments the same?
39 bne $1, $misaligned # U : Nope - gotta do this the slow way
41 and $16, 7, $1 # E : Are both 0mod8?
53 subq $18, 1, $18 # E : count--
55 stb $1, 0($16) # L :
56 addq $16, 1, $16 # E : dest++
57 and $16, 7, $1 # E : Are we at 0mod8 yet?
64 and $16, 63, $1 # E : get mod64 alignment
69 subq $18, 8, $18 # E : count -= 8
73 stq $1, 0($16) # L : store
74 addq $16, 8, $16 # E : dest += 8
75 and $16, 63, $1 # E : get mod64 alignment
79 addq $16, 64, $7 # E : Initial (+1 trip) wh64 address
86 # ($7) are about to be over-written
91 ldq $4, 8($17) # L : bytes 8..15
92 ldq $5, 16($17) # L : bytes 16..23
97 addq $16, 64, $1 # E : fallback value for wh64
102 stq $6, 0($16) # L : bytes 0..7
106 stq $4, 8($16) # L : bytes 8..15
107 stq $5, 16($16) # L : bytes 16..23
111 stq $3, 24($16) # L : bytes 24..31
112 addq $16, 32, $16 # E : dest += 32 bytes
117 ldq $4, 8($17) # L : bytes 8..15
118 cmovlt $2, $1, $7 # E : Latency 2, extra map slot - Use
122 ldq $5, 16($17) # L : bytes 16..23
124 addq $16, 32, $16 # E : dest += 32
125 subq $18, 64, $18 # E : count -= 64
128 stq $6, -32($16) # L : bytes 0..7
129 stq $4, -24($16) # L : bytes 8..15
132 stq $5, -16($16) # L : bytes 16..23
133 stq $3, -8($16) # L : bytes 24..31
139 .align 4
147 subq $18, 8, $18 # E : count -= 8
151 stq $1, 0($16) # L : store 8
152 addq $16, 8, $16 # E : dest += 8
157 .align 4
159 ble $18, $nomoredata # U : All-done
165 subq $18, 1, $18 # E : count--
170 stb $1, 0($16) # L : store a byte
171 addq $16, 1, $16 # E : dest++
182 mov $0, $4 # E : dest temp
190 subq $18, 1, $18 # E : count--
193 stb $1, 0($4) # L : store it
194 addq $4, 1, $4 # E : dest++
195 and $4, 7, $1 # E : dest 0mod8 yet?
206 ldq_u $16, 8($17) # L : Fetch next 8
208 extqh $16, $17, $1 # U : masking
211 subq $18, 8, $18 # E : count -= 8
213 stq $1, 0($4) # L : store 8 (aligned)
214 mov $16, $3 # E : "rotate" source data
216 addq $4, 8, $4 # E : dest += 8
229 subq $18, 1, $18 # E : count--
233 stb $1, 0($4) # L : store
234 addq $4, 1, $4 # E : dest++