FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libswscale/x86/hscale_fast_bilinear_simd.c
Date: 2024-05-03 15:42:48
Exec Total Coverage
Lines: 0 64 0.0%
Functions: 0 3 0.0%
Branches: 0 30 0.0%
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1 /*
2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "../swscale_internal.h"
22 #include "libavutil/attributes.h"
23 #include "libavutil/x86/asm.h"
24 #include "libavutil/x86/cpu.h"
25 #include "libavutil/mem_internal.h"
26
27 #define RET 0xC3 // near return opcode for x86
28 #define PREFETCH "prefetchnta"
29
30 #if HAVE_INLINE_ASM
31 ✗ av_cold int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode,
32 int16_t *filter, int32_t *filterPos,
33 int numSplits)
34 {
35 uint8_t *fragmentA;
36 x86_reg imm8OfPShufW1A;
37 x86_reg imm8OfPShufW2A;
38 x86_reg fragmentLengthA;
39 uint8_t *fragmentB;
40 x86_reg imm8OfPShufW1B;
41 x86_reg imm8OfPShufW2B;
42 x86_reg fragmentLengthB;
43 int fragmentPos;
44
45 int xpos, i;
46
47 // create an optimized horizontal scaling routine
48 /* This scaler is made of runtime-generated MMXEXT code using specially tuned
49 * pshufw instructions. For every four output pixels, if four input pixels
50 * are enough for the fast bilinear scaling, then a chunk of fragmentB is
51 * used. If five input pixels are needed, then a chunk of fragmentA is used.
52 */
53
54 // code fragment
55
56 ✗ __asm__ volatile (
57 "jmp 9f \n\t"
58 // Begin
59 "0: \n\t"
60 "movq (%%"FF_REG_d", %%"FF_REG_a"), %%mm3 \n\t"
61 "movd (%%"FF_REG_c", %%"FF_REG_S"), %%mm0 \n\t"
62 "movd 1(%%"FF_REG_c", %%"FF_REG_S"), %%mm1 \n\t"
63 "punpcklbw %%mm7, %%mm1 \n\t"
64 "punpcklbw %%mm7, %%mm0 \n\t"
65 "pshufw $0xFF, %%mm1, %%mm1 \n\t"
66 "1: \n\t"
67 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
68 "2: \n\t"
69 "psubw %%mm1, %%mm0 \n\t"
70 "movl 8(%%"FF_REG_b", %%"FF_REG_a"), %%esi \n\t"
71 "pmullw %%mm3, %%mm0 \n\t"
72 "psllw $7, %%mm1 \n\t"
73 "paddw %%mm1, %%mm0 \n\t"
74
75 "movq %%mm0, (%%"FF_REG_D", %%"FF_REG_a") \n\t"
76
77 "add $8, %%"FF_REG_a" \n\t"
78 // End
79 "9: \n\t"
80 "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
81 "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
82 "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
83 "dec %1 \n\t"
84 "dec %2 \n\t"
85 "sub %0, %1 \n\t"
86 "sub %0, %2 \n\t"
87 "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
88 "sub %0, %3 \n\t"
89
90
91 : "=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
92 "=r" (fragmentLengthA)
93 );
94
95 ✗ __asm__ volatile (
96 "jmp 9f \n\t"
97 // Begin
98 "0: \n\t"
99 "movq (%%"FF_REG_d", %%"FF_REG_a"), %%mm3 \n\t"
100 "movd (%%"FF_REG_c", %%"FF_REG_S"), %%mm0 \n\t"
101 "punpcklbw %%mm7, %%mm0 \n\t"
102 "pshufw $0xFF, %%mm0, %%mm1 \n\t"
103 "1: \n\t"
104 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
105 "2: \n\t"
106 "psubw %%mm1, %%mm0 \n\t"
107 "movl 8(%%"FF_REG_b", %%"FF_REG_a"), %%esi \n\t"
108 "pmullw %%mm3, %%mm0 \n\t"
109 "psllw $7, %%mm1 \n\t"
110 "paddw %%mm1, %%mm0 \n\t"
111
112 "movq %%mm0, (%%"FF_REG_D", %%"FF_REG_a") \n\t"
113
114 "add $8, %%"FF_REG_a" \n\t"
115 // End
116 "9: \n\t"
117 "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
118 "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
119 "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
120 "dec %1 \n\t"
121 "dec %2 \n\t"
122 "sub %0, %1 \n\t"
123 "sub %0, %2 \n\t"
124 "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
125 "sub %0, %3 \n\t"
126
127
128 : "=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
129 "=r" (fragmentLengthB)
130 );
131
132 ✗ xpos = 0; // lumXInc/2 - 0x8000; // difference between pixel centers
133 ✗ fragmentPos = 0;
134
135 ✗ for (i = 0; i < dstW / numSplits; i++) {
136 ✗ int xx = xpos >> 16;
137
138 ✗ if ((i & 3) == 0) {
139 ✗ int a = 0;
140 ✗ int b = ((xpos + xInc) >> 16) - xx;
141 ✗ int c = ((xpos + xInc * 2) >> 16) - xx;
142 ✗ int d = ((xpos + xInc * 3) >> 16) - xx;
143 ✗ int inc = (d + 1 < 4);
144 ✗ uint8_t *fragment = inc ? fragmentB : fragmentA;
145 ✗ x86_reg imm8OfPShufW1 = inc ? imm8OfPShufW1B : imm8OfPShufW1A;
146 ✗ x86_reg imm8OfPShufW2 = inc ? imm8OfPShufW2B : imm8OfPShufW2A;
147 ✗ x86_reg fragmentLength = inc ? fragmentLengthB : fragmentLengthA;
148 ✗ int maxShift = 3 - (d + inc);
149 ✗ int shift = 0;
150
151 ✗ if (filterCode) {
152 ✗ filter[i] = ((xpos & 0xFFFF) ^ 0xFFFF) >> 9;
153 ✗ filter[i + 1] = (((xpos + xInc) & 0xFFFF) ^ 0xFFFF) >> 9;
154 ✗ filter[i + 2] = (((xpos + xInc * 2) & 0xFFFF) ^ 0xFFFF) >> 9;
155 ✗ filter[i + 3] = (((xpos + xInc * 3) & 0xFFFF) ^ 0xFFFF) >> 9;
156 ✗ filterPos[i / 2] = xx;
157
158 ✗ memcpy(filterCode + fragmentPos, fragment, fragmentLength);
159
160 ✗ filterCode[fragmentPos + imm8OfPShufW1] = (a + inc) |
161 ✗ ((b + inc) << 2) |
162 ✗ ((c + inc) << 4) |
163 ✗ ((d + inc) << 6);
164 ✗ filterCode[fragmentPos + imm8OfPShufW2] = a | (b << 2) |
165 ✗ (c << 4) |
166 (d << 6);
167
168 ✗ if (i + 4 - inc >= dstW)
169 ✗ shift = maxShift; // avoid overread
170 ✗ else if ((filterPos[i / 2] & 3) <= maxShift)
171 ✗ shift = filterPos[i / 2] & 3; // align
172
173 ✗ if (shift && i >= shift) {
174 ✗ filterCode[fragmentPos + imm8OfPShufW1] += 0x55 * shift;
175 ✗ filterCode[fragmentPos + imm8OfPShufW2] += 0x55 * shift;
176 ✗ filterPos[i / 2] -= shift;
177 }
178 }
179
180 ✗ fragmentPos += fragmentLength;
181
182 ✗ if (filterCode)
183 ✗ filterCode[fragmentPos] = RET;
184 }
185 ✗ xpos += xInc;
186 }
187 ✗ if (filterCode)
188 ✗ filterPos[((i / 2) + 1) & (~1)] = xpos >> 16; // needed to jump to the next part
189
190 ✗ return fragmentPos + 1;
191 }
192
193 ✗ void ff_hyscale_fast_mmxext(SwsContext *c, int16_t *dst,
194 int dstWidth, const uint8_t *src,
195 int srcW, int xInc)
196 {
197 ✗ int32_t *filterPos = c->hLumFilterPos;
198 ✗ int16_t *filter = c->hLumFilter;
199 ✗ void *mmxextFilterCode = c->lumMmxextFilterCode;
200 int i;
201 #if ARCH_X86_64
202 uint64_t retsave;
203 #else
204 #if !HAVE_EBX_AVAILABLE
205 uint64_t ebxsave;
206 #endif
207 #endif
208
209 ✗ __asm__ volatile(
210 #if ARCH_X86_64
211 "mov -8(%%rsp), %%"FF_REG_a" \n\t"
212 "mov %%"FF_REG_a", %5 \n\t" // retsave
213 #else
214 #if !HAVE_EBX_AVAILABLE
215 "mov %%"FF_REG_b", %5 \n\t" // ebxsave
216 #endif
217 #endif
218 "pxor %%mm7, %%mm7 \n\t"
219 "mov %0, %%"FF_REG_c" \n\t"
220 "mov %1, %%"FF_REG_D" \n\t"
221 "mov %2, %%"FF_REG_d" \n\t"
222 "mov %3, %%"FF_REG_b" \n\t"
223 "xor %%"FF_REG_a", %%"FF_REG_a" \n\t" // i
224 PREFETCH" (%%"FF_REG_c") \n\t"
225 PREFETCH" 32(%%"FF_REG_c") \n\t"
226 PREFETCH" 64(%%"FF_REG_c") \n\t"
227
228 #if ARCH_X86_64
229 #define CALL_MMXEXT_FILTER_CODE \
230 "movl (%%"FF_REG_b"), %%esi \n\t"\
231 "call *%4 \n\t"\
232 "movl (%%"FF_REG_b", %%"FF_REG_a"), %%esi \n\t"\
233 "add %%"FF_REG_S", %%"FF_REG_c" \n\t"\
234 "add %%"FF_REG_a", %%"FF_REG_D" \n\t"\
235 "xor %%"FF_REG_a", %%"FF_REG_a" \n\t"\
236
237 #else
238 #define CALL_MMXEXT_FILTER_CODE \
239 "movl (%%"FF_REG_b"), %%esi \n\t"\
240 "call *%4 \n\t"\
241 "addl (%%"FF_REG_b", %%"FF_REG_a"), %%"FF_REG_c" \n\t"\
242 "add %%"FF_REG_a", %%"FF_REG_D" \n\t"\
243 "xor %%"FF_REG_a", %%"FF_REG_a" \n\t"\
244
245 #endif /* ARCH_X86_64 */
246
247 CALL_MMXEXT_FILTER_CODE
248 CALL_MMXEXT_FILTER_CODE
249 CALL_MMXEXT_FILTER_CODE
250 CALL_MMXEXT_FILTER_CODE
251 CALL_MMXEXT_FILTER_CODE
252 CALL_MMXEXT_FILTER_CODE
253 CALL_MMXEXT_FILTER_CODE
254 CALL_MMXEXT_FILTER_CODE
255
256 #if ARCH_X86_64
257 "mov %5, %%"FF_REG_a" \n\t"
258 "mov %%"FF_REG_a", -8(%%rsp) \n\t"
259 #else
260 #if !HAVE_EBX_AVAILABLE
261 "mov %5, %%"FF_REG_b" \n\t"
262 #endif
263 #endif
264 :: "m" (src), "m" (dst), "m" (filter), "m" (filterPos),
265 "m" (mmxextFilterCode)
266 #if ARCH_X86_64
267 ,"m"(retsave)
268 #else
269 #if !HAVE_EBX_AVAILABLE
270 ,"m" (ebxsave)
271 #endif
272 #endif
273 : "%"FF_REG_a, "%"FF_REG_c, "%"FF_REG_d, "%"FF_REG_S, "%"FF_REG_D
274 #if ARCH_X86_64 || HAVE_EBX_AVAILABLE
275 ,"%"FF_REG_b
276 #endif
277 );
278
279 ✗ for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--)
280 ✗ dst[i] = src[srcW-1]*128;
281 ✗ }
282
283 ✗ void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2,
284 int dstWidth, const uint8_t *src1,
285 const uint8_t *src2, int srcW, int xInc)
286 {
287 ✗ int32_t *filterPos = c->hChrFilterPos;
288 ✗ int16_t *filter = c->hChrFilter;
289 ✗ void *mmxextFilterCode = c->chrMmxextFilterCode;
290 int i;
291 #if ARCH_X86_64
292 DECLARE_ALIGNED(8, uint64_t, retsave);
293 #else
294 #if !HAVE_EBX_AVAILABLE
295 DECLARE_ALIGNED(8, uint64_t, ebxsave);
296 #endif
297 #endif
298 ✗ __asm__ volatile(
299 #if ARCH_X86_64
300 "mov -8(%%rsp), %%"FF_REG_a" \n\t"
301 "mov %%"FF_REG_a", %7 \n\t" // retsave
302 #else
303 #if !HAVE_EBX_AVAILABLE
304 "mov %%"FF_REG_b", %7 \n\t" // ebxsave
305 #endif
306 #endif
307 "pxor %%mm7, %%mm7 \n\t"
308 "mov %0, %%"FF_REG_c" \n\t"
309 "mov %1, %%"FF_REG_D" \n\t"
310 "mov %2, %%"FF_REG_d" \n\t"
311 "mov %3, %%"FF_REG_b" \n\t"
312 "xor %%"FF_REG_a", %%"FF_REG_a" \n\t" // i
313 PREFETCH" (%%"FF_REG_c") \n\t"
314 PREFETCH" 32(%%"FF_REG_c") \n\t"
315 PREFETCH" 64(%%"FF_REG_c") \n\t"
316
317 CALL_MMXEXT_FILTER_CODE
318 CALL_MMXEXT_FILTER_CODE
319 CALL_MMXEXT_FILTER_CODE
320 CALL_MMXEXT_FILTER_CODE
321 "xor %%"FF_REG_a", %%"FF_REG_a" \n\t" // i
322 "mov %5, %%"FF_REG_c" \n\t" // src2
323 "mov %6, %%"FF_REG_D" \n\t" // dst2
324 PREFETCH" (%%"FF_REG_c") \n\t"
325 PREFETCH" 32(%%"FF_REG_c") \n\t"
326 PREFETCH" 64(%%"FF_REG_c") \n\t"
327
328 CALL_MMXEXT_FILTER_CODE
329 CALL_MMXEXT_FILTER_CODE
330 CALL_MMXEXT_FILTER_CODE
331 CALL_MMXEXT_FILTER_CODE
332
333 #if ARCH_X86_64
334 "mov %7, %%"FF_REG_a" \n\t"
335 "mov %%"FF_REG_a", -8(%%rsp) \n\t"
336 #else
337 #if !HAVE_EBX_AVAILABLE
338 "mov %7, %%"FF_REG_b" \n\t"
339 #endif
340 #endif
341 :: "m" (src1), "m" (dst1), "m" (filter), "m" (filterPos),
342 "m" (mmxextFilterCode), "m" (src2), "m"(dst2)
343 #if ARCH_X86_64
344 ,"m"(retsave)
345 #else
346 #if !HAVE_EBX_AVAILABLE
347 ,"m" (ebxsave)
348 #endif
349 #endif
350 : "%"FF_REG_a, "%"FF_REG_c, "%"FF_REG_d, "%"FF_REG_S, "%"FF_REG_D
351 #if ARCH_X86_64 || HAVE_EBX_AVAILABLE
352 ,"%"FF_REG_b
353 #endif
354 );
355
356 ✗ for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) {
357 ✗ dst1[i] = src1[srcW-1]*128;
358 ✗ dst2[i] = src2[srcW-1]*128;
359 }
360 ✗ }
361 #endif //HAVE_INLINE_ASM
362