1 /*
2 * Copyright (c) 2017-2018 Arm Limited.
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24 #pragma once
25
26 #ifdef __arm__
27
28 #include <arm_neon.h>
29
30 #include "../asmlib.hpp"
31
32 template<>
interleave_block(float * & outptr,const float * const * in,size_t width,size_t height,size_t row_offset,bool)33 void interleave_block<6, 1, VLType::None, false>(
34 float * &outptr, const float * const * in, size_t width, size_t height,
35 size_t row_offset, bool
36 )
37 {
38 const float *inptr0 = in[0] + row_offset;
39 const float *inptr1 = in[1] + row_offset;
40 const float *inptr2 = in[2] + row_offset;
41 const float *inptr3 = in[3] + row_offset;
42 const float *inptr4 = in[4] + row_offset;
43 const float *inptr5 = in[5] + row_offset;
44
45 // Cope with ragged cases by aliasing the first row (which is always valid).
46 // The nonsense output produced will be suppressed later anyway.
47 switch (height) {
48 case 1:
49 inptr1 = inptr0;
50 // fall through
51 case 2:
52 inptr2 = inptr0;
53 // fall through
54 case 3:
55 inptr3 = inptr0;
56 // fall through
57 case 4:
58 inptr4 = inptr0;
59 // fall through
60 case 5:
61 inptr5 = inptr0;
62 // fall through
63 default:
64 case 6:
65 break;
66 }
67
68 //prefetch_2x(inptr0);
69 //prefetch_2x(inptr1);
70 //prefetch_2x(inptr2);
71 //prefetch_2x(inptr3);
72 //prefetch_2x(inptr4);
73 //prefetch_2x(inptr5);
74
75 for (;width>7;width-=8) {
76 __asm __volatile (
77 // Load up 8 elements (2 vectors) from each of 8 sources.
78 "VLD1.32 {d0-d3}, [%[inptr0]]!\n" // q0=A0A1A2A3
79 "VLD1.32 {d4-d7}, [%[inptr1]]!\n" // q2=B0B1B2B3
80 "VLD1.32 {d8-d11}, [%[inptr2]]!\n" // q4=C0C1C2C3
81 "VZIP.32 q0, q4\n" // q0=A0C0A1C1, q4 = A2C2A3C3
82 "VLD1.32 {d12-d15}, [%[inptr3]]!\n" // q6=D0D1D2D3
83 "VZIP.32 q2, q6\n" // q2=B0D0B1D1, q6 = B2D2B3D3
84 "VLD1.32 {d16-d19}, [%[inptr4]]!\n"
85 "VLD1.32 {d20-d23}, [%[inptr5]]!\n"
86 "VZIP.32 q8, q10\n" // q8=E0F0E1F1, q10 = E2F2E3F3
87 ASM_PREFETCH("[%[inptr0], #128]")
88 "VZIP.32 q0, q2\n" // q0 = A0B0C0D0, q2 = A1B1C1D1
89
90 // Store first elements
91 "VST1.32 {d0-d1}, [%[outptr]]!\n"
92 "VST1.32 {d16}, [%[outptr]]!\n"
93
94 "VZIP.32 q4, q6\n" // q4 = A2B2C2D2, q6 = A3B3C3D3
95
96 // Store second elements
97 "VST1.32 {d4-d5}, [%[outptr]]!\n"
98 "VZIP.32 q1, q5\n"
99 ASM_PREFETCH("[%[inptr1], #128]")
100 "VST1.32 {d17}, [%[outptr]]!\n"
101 "VZIP.32 q3, q7\n"
102
103 // Store third elements
104 "VZIP.32 q9, q11\n"
105 "VST1.32 {d8-d9}, [%[outptr]]!\n"
106 "VZIP.32 q1, q3\n"
107 ASM_PREFETCH("[%[inptr2], #128]")
108 "VST1.32 {d20}, [%[outptr]]!\n"
109
110 // Store fourth elements
111 "VZIP.32 q5, q7\n"
112 "VST1.32 {d12-d13}, [%[outptr]]!\n"
113 ASM_PREFETCH("[%[inptr3], #128]")
114 "VST1.32 {d21}, [%[outptr]]!\n"
115
116 // Fifth
117 "VST1.32 {d2-d3}, [%[outptr]]!\n"
118 ASM_PREFETCH("[%[inptr4], #128]")
119 "VST1.32 {d18}, [%[outptr]]!\n"
120
121 // Sixth
122 "VST1.32 {d6-d7}, [%[outptr]]!\n"
123 ASM_PREFETCH("[%[inptr5], #128]")
124 "VST1.32 {d19}, [%[outptr]]!\n"
125
126 // Seventh
127 "VST1.32 {d10-d11}, [%[outptr]]!\n"
128 "VST1.32 {d22}, [%[outptr]]!\n"
129
130 // Eighth
131 "VST1.32 {d14-d15}, [%[outptr]]!\n"
132 "VST1.32 {d23}, [%[outptr]]!\n"
133
134 : [inptr0] "+r" (inptr0), [inptr1] "+r" (inptr1), [inptr2] "+r" (inptr2), [inptr3] "+r" (inptr3),
135 [inptr4] "+r" (inptr4), [inptr5] "+r" (inptr5), [outptr] "+r" (outptr)
136 :
137 : "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", "q8", "q9", "q10", "q11", "q12", "memory"
138 );
139 }
140
141 for (;width>0;width--) {
142 *outptr++ = *inptr0++;
143 *outptr++ = *inptr1++;
144 *outptr++ = *inptr2++;
145 *outptr++ = *inptr3++;
146 *outptr++ = *inptr4++;
147 *outptr++ = *inptr5++;
148 }
149 }
150
151 #endif // __arm__
152