summaryrefslogtreecommitdiffstats
path: root/src/gui/painting/qdrawhelper_neon_asm.S
blob: d9cdc36d9822d16badf5ddcc770caf8fd94b6dc2 (plain)
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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

/* Prevent the stack from becoming executable for no reason... */
#if defined(__linux__) && defined(__ELF__)
.section .note.GNU-stack,"",%progbits
#endif

.text
.fpu neon
.arch armv7a
.altmacro

/* void blend_8_pixels_argb32_on_rgb16_neon(quint16 *dst, const quint32 *src, int const_alpha) */

    .func blend_8_pixels_argb32_on_rgb16_neon
    .global blend_8_pixels_argb32_on_rgb16_neon
    /* For ELF format also set function visibility to hidden */
#ifdef __ELF__
    .hidden blend_8_pixels_argb32_on_rgb16_neon
    .type blend_8_pixels_argb32_on_rgb16_neon, %function
#endif
blend_8_pixels_argb32_on_rgb16_neon:
    vld4.8      { d0, d1, d2, d3 }, [r1]
    vld1.16     { d4, d5 }, [r0]

    cmp         r2, #256
    beq         .blend_32_inner

    vdup.8      d6, r2

    /* multiply by const_alpha */
    vmull.u8    q8,   d6, d0
    vmull.u8    q9,   d6, d1
    vmull.u8    q10,  d6, d2
    vmull.u8    q11,  d6, d3

    vshrn.u16   d0,  q8, #8
    vshrn.u16   d1,  q9, #8
    vshrn.u16   d2, q10, #8
    vshrn.u16   d3, q11, #8

.blend_32_inner:
    /* convert 8 r5g6b5 pixel data from {d4, d5} to planar 8-bit format
       and put data into d6 - red, d7 - green, d30 - blue */
    vshrn.u16   d6, q2, #8
    vshrn.u16   d7, q2, #3
    vsli.u16    q2, q2, #5
    vsri.u8     d6, d6, #5
    vmvn.8      d3, d3
    vsri.u8     d7, d7, #6
    vshrn.u16   d30, q2, #2

    pld [r0, #128]

    /* now do alpha blending, storing results in 8-bit planar format
       into d16 - red, d19 - green, d18 - blue */
    vmull.u8    q10, d3, d6
    vmull.u8    q11, d3, d7
    vmull.u8    q12, d3, d30
    vrshr.u16   q13, q10, #8
    vrshr.u16   q3,  q11, #8
    vrshr.u16   q15, q12, #8
    vraddhn.u16 d20, q10, q13
    vraddhn.u16 d23, q11, q3
    vraddhn.u16 d22, q12, q15
    vqadd.u8    d16, d2, d20
    vqadd.u8    q9, q0, q11
    /* convert the result to r5g6b5 and store it into {d28, d29} */
    vshll.u8    q14, d16, #8
    vshll.u8    q8, d19, #8
    vshll.u8    q9, d18, #8
    vsri.u16    q14, q8, #5
    vsri.u16    q14, q9, #11

    vst1.16     { d28, d29 }, [r0]

    bx          lr

    .endfunc

/* void blend_8_pixels_rgb16_on_rgb16_neon(quint16 *dst, const quint16 *src, int const_alpha) */

    .func blend_8_pixels_rgb16_on_rgb16_neon
    .global blend_8_pixels_rgb16_on_rgb16_neon
    /* For ELF format also set function visibility to hidden */
#ifdef __ELF__
    .hidden blend_8_pixels_rgb16_on_rgb16_neon
    .type blend_8_pixels_rgb16_on_rgb16_neon, %function
#endif
blend_8_pixels_rgb16_on_rgb16_neon:
    vld1.16     { d0, d1 }, [r0]
    vld1.16     { d2, d3 }, [r1]

    rsb         r3, r2, #256
    vdup.8      d4, r2
    vdup.8      d5, r3

    /* convert 8 r5g6b5 pixel data from {d0, d1} to planar 8-bit format
       and put data into d6 - red, d7 - green, d30 - blue */
    vshrn.u16   d6,  q0,  #8
    vshrn.u16   d7,  q0,  #3
    vsli.u16    q0,  q0,  #5
    vsri.u8     d6,  d6,  #5
    vsri.u8     d7,  d7,  #6
    vshrn.u16   d30, q0,  #2

    /* same from {d2, d3} into {d26, d27, d28} */
    vshrn.u16   d26, q1,  #8
    vshrn.u16   d27, q1,  #3
    vsli.u16    q1,  q1,  #5
    vsri.u8     d26, d26, #5
    vsri.u8     d27, d27, #6
    vshrn.u16   d28, q1,  #2

    /* multiply dst by inv const_alpha */
    vmull.u8    q10, d5,  d6
    vmull.u8    q11, d5,  d7
    vmull.u8    q12, d5,  d30

    vshrn.u16   d6,  q10, #8
    vshrn.u16   d7,  q11, #8
    vshrn.u16   d30, q12, #8

    /* multiply src by const_alpha */
    vmull.u8    q10,  d4, d26
    vmull.u8    q11,  d4, d27
    vmull.u8    q12,  d4, d28

    vshrn.u16   d26, q10, #8
    vshrn.u16   d27, q11, #8
    vshrn.u16   d28, q12, #8

    /* preload dst + 128 */
    pld [r0, #128]

    /* add components, storing results in 8-bit planar format
       into d16 - red, d19 - green, d18 - blue */
    vadd.u8     d16, d26, d6
    vadd.u8     d19, d27, d7
    vadd.u8     d18, d28, d30

    /* convert the result to r5g6b5 and store it into {d28, d29} */
    vshll.u8    q14, d16, #8
    vshll.u8    q8,  d19, #8
    vshll.u8    q9,  d18, #8
    vsri.u16    q14,  q8, #5
    vsri.u16    q14,  q9, #11

    vst1.16     { d28, d29 }, [r0]

    bx          lr

    .endfunc

/* void qt_rotate90_16_neon(quint16 *dst, const quint16 *src, int sstride, int dstride, int count) */
    .func qt_rotate90_16_neon
    .global qt_rotate90_16_neon
    /* For ELF format also set function visibility to hidden */
#ifdef __ELF__
    .hidden qt_rotate90_16_neon
    .type qt_rotate90_16_neon, %function
#endif
qt_rotate90_16_neon:
    push { r4-r11, lr }
    ldr r5, [sp, #(9*4)]

    /* The preloads are the key to getting good performance */
    pld [r1]

    mov r4, r5, asr #2
    add r6, r0, r3
    add r7, r6, r3

    add r8, r7, r3
    add r9, r8, r3

    pld [r1, r2]

    add r10, r9, r3
    add r11, r10, r3

    add r3, r3, r11
    and r5, r5, #3

    pld [r1, r2, lsl #1]

    cmp r4, #0
    beq .rotate90_16_tail

.rotate90_16_loop:
    vld1.16 { q8  }, [r1], r2

    pld [r1, r2, lsl #1]

    vld1.16 { q9  }, [r1], r2
    vld1.16 { q10 }, [r1], r2
    vld1.16 { q11 }, [r1], r2

    pld [r1]

    /* Could have used four quad-word zips instead,
       but those take three cycles as opposed to one. */
    vzip.16 d16, d20
    vzip.16 d17, d21

    vzip.16 d18, d22

    pld [r1, r2]

    vzip.16 d19, d23

    vzip.16 d16, d18
    vzip.16 d17, d19

    pld [r1, r2, lsl #1]

    vzip.16 d20, d22
    vzip.16 d21, d23

    vst1.16 { d23 }, [r0]!
    vst1.16 { d21 }, [r6]!
    vst1.16 { d19 }, [r7]!
    vst1.16 { d17 }, [r8]!
    vst1.16 { d22 }, [r9]!
    vst1.16 { d20 }, [r10]!
    vst1.16 { d18 }, [r11]!
    vst1.16 { d16 }, [r3]!

    sub r4, r4, #1
    cmp r4, #0
    bne .rotate90_16_loop
    b .rotate90_16_tail

.rotate90_16_tail_loop:
    sub r5, r5, #2

    vld1.16 { q8 }, [r1], r2
    vld1.16 { q9 }, [r1], r2

    vzip.16 d16, d18
    vzip.16 d17, d19

    vst1.32 { d19[1] }, [r0]!
    vst1.32 { d19[0] }, [r6]!
    vst1.32 { d17[1] }, [r7]!
    vst1.32 { d17[0] }, [r8]!
    vst1.32 { d18[1] }, [r9]!
    vst1.32 { d18[0] }, [r10]!
    vst1.32 { d16[1] }, [r11]!
    vst1.32 { d16[0] }, [r3]!

.rotate90_16_tail:
    cmp r5, #0
    bgt .rotate90_16_tail_loop

    pop { r4-r11, pc }

    .endfunc