1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/***************************************************************************
Copyright (c) 2009-2013 The Linux Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of The Linux Foundation nor the names of its contributors may
be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
/* Assumes neon instructions and a cache line size of 64 bytes. */
#include <machine/cpu-features.h>
#include <machine/asm.h>
#define PLDOFFS (10)
#define PLDTHRESH (PLDOFFS)
#define BBTHRESH (4096/64)
#define PLDSIZE (64)
#if (PLDOFFS < 1)
#error Routine does not support offsets less than 1
#endif
#if (PLDTHRESH < PLDOFFS)
#error PLD threshold must be greater than or equal to the PLD offset
#endif
.text
.fpu neon
.L_memcpy_base:
cmp r2, #4
blt .L_neon_lt4
cmp r2, #16
blt .L_neon_lt16
cmp r2, #32
blt .L_neon_16
cmp r2, #64
blt .L_neon_copy_32_a
mov r12, r2, lsr #6
cmp r12, #PLDTHRESH
ble .L_neon_copy_64_loop_nopld
push {r9, r10}
.cfi_adjust_cfa_offset 8
.cfi_rel_offset r9, 0
.cfi_rel_offset r10, 4
cmp r12, #BBTHRESH
ble .L_neon_prime_pump
add lr, r0, #0x400
add r9, r1, #(PLDOFFS*PLDSIZE)
sub lr, lr, r9
lsl lr, lr, #21
lsr lr, lr, #21
add lr, lr, #(PLDOFFS*PLDSIZE)
cmp r12, lr, lsr #6
ble .L_neon_prime_pump
itt gt
movgt r9, #(PLDOFFS)
rsbsgt r9, r9, lr, lsr #6
ble .L_neon_prime_pump
add r10, r1, lr
bic r10, #0x3F
sub r12, r12, lr, lsr #6
cmp r9, r12
itee le
suble r12, r12, r9
movgt r9, r12
movgt r12, #0
pld [r1, #((PLDOFFS-1)*PLDSIZE)]
.L_neon_copy_64_loop_outer_doublepld:
pld [r1, #((PLDOFFS)*PLDSIZE)]
vld1.32 {q0, q1}, [r1]!
vld1.32 {q2, q3}, [r1]!
ldr r3, [r10]
subs r9, r9, #1
vst1.32 {q0, q1}, [r0]!
vst1.32 {q2, q3}, [r0]!
add r10, #64
bne .L_neon_copy_64_loop_outer_doublepld
cmp r12, #0
beq .L_neon_pop_before_nopld
cmp r12, #(512*1024/64)
blt .L_neon_copy_64_loop_outer
.L_neon_copy_64_loop_ddr:
vld1.32 {q0, q1}, [r1]!
vld1.32 {q2, q3}, [r1]!
pld [r10]
subs r12, r12, #1
vst1.32 {q0, q1}, [r0]!
vst1.32 {q2, q3}, [r0]!
add r10, #64
bne .L_neon_copy_64_loop_ddr
b .L_neon_pop_before_nopld
.L_neon_prime_pump:
mov lr, #(PLDOFFS*PLDSIZE)
add r10, r1, #(PLDOFFS*PLDSIZE)
bic r10, #0x3F
sub r12, r12, #PLDOFFS
ldr r3, [r10, #(-1*PLDSIZE)]
.L_neon_copy_64_loop_outer:
vld1.32 {q0, q1}, [r1]!
vld1.32 {q2, q3}, [r1]!
ldr r3, [r10]
subs r12, r12, #1
vst1.32 {q0, q1}, [r0]!
vst1.32 {q2, q3}, [r0]!
add r10, #64
bne .L_neon_copy_64_loop_outer
.L_neon_pop_before_nopld:
mov r12, lr, lsr #6
pop {r9, r10}
.cfi_adjust_cfa_offset -8
.cfi_restore r9
.cfi_restore r10
.L_neon_copy_64_loop_nopld:
vld1.32 {q8, q9}, [r1]!
vld1.32 {q10, q11}, [r1]!
subs r12, r12, #1
vst1.32 {q8, q9}, [r0]!
vst1.32 {q10, q11}, [r0]!
bne .L_neon_copy_64_loop_nopld
ands r2, r2, #0x3f
beq .L_neon_exit
.L_neon_copy_32_a:
movs r3, r2, lsl #27
bcc .L_neon_16
vld1.32 {q0,q1}, [r1]!
vst1.32 {q0,q1}, [r0]!
.L_neon_16:
bpl .L_neon_lt16
vld1.32 {q8}, [r1]!
vst1.32 {q8}, [r0]!
ands r2, r2, #0x0f
beq .L_neon_exit
.L_neon_lt16:
movs r3, r2, lsl #29
bcc 1f
vld1.8 {d0}, [r1]!
vst1.8 {d0}, [r0]!
1:
bge .L_neon_lt4
vld4.8 {d0[0], d1[0], d2[0], d3[0]}, [r1]!
vst4.8 {d0[0], d1[0], d2[0], d3[0]}, [r0]!
.L_neon_lt4:
movs r2, r2, lsl #31
itt cs
ldrhcs r3, [r1], #2
strhcs r3, [r0], #2
itt mi
ldrbmi r3, [r1]
strbmi r3, [r0]
.L_neon_exit:
pop {r0, pc}
|
