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