| 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 | 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 | __asm__ volatile ( |
| 55 | "jmp 9f \n\t" |
| 56 | // Begin |
| 57 | "0: \n\t" |
| 58 | "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" |
| 59 | "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" |
| 60 | "movd 1(%%"REG_c", %%"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(%%"REG_b", %%"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, (%%"REG_D", %%"REG_a") \n\t" |
| 74 | |
| 75 | "add $8, %%"REG_a" \n\t" |
| 76 | // End |
| 77 | "9: \n\t" |
| 78 | // "int $3 \n\t" |
| 79 | "lea " LOCAL_MANGLE(0b) ", %0 \n\t" |
| 80 | "lea " LOCAL_MANGLE(1b) ", %1 \n\t" |
| 81 | "lea " LOCAL_MANGLE(2b) ", %2 \n\t" |
| 82 | "dec %1 \n\t" |
| 83 | "dec %2 \n\t" |
| 84 | "sub %0, %1 \n\t" |
| 85 | "sub %0, %2 \n\t" |
| 86 | "lea " LOCAL_MANGLE(9b) ", %3 \n\t" |
| 87 | "sub %0, %3 \n\t" |
| 88 | |
| 89 | |
| 90 | : "=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A), |
| 91 | "=r" (fragmentLengthA) |
| 92 | ); |
| 93 | |
| 94 | __asm__ volatile ( |
| 95 | "jmp 9f \n\t" |
| 96 | // Begin |
| 97 | "0: \n\t" |
| 98 | "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" |
| 99 | "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" |
| 100 | "punpcklbw %%mm7, %%mm0 \n\t" |
| 101 | "pshufw $0xFF, %%mm0, %%mm1 \n\t" |
| 102 | "1: \n\t" |
| 103 | "pshufw $0xFF, %%mm0, %%mm0 \n\t" |
| 104 | "2: \n\t" |
| 105 | "psubw %%mm1, %%mm0 \n\t" |
| 106 | "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t" |
| 107 | "pmullw %%mm3, %%mm0 \n\t" |
| 108 | "psllw $7, %%mm1 \n\t" |
| 109 | "paddw %%mm1, %%mm0 \n\t" |
| 110 | |
| 111 | "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t" |
| 112 | |
| 113 | "add $8, %%"REG_a" \n\t" |
| 114 | // End |
| 115 | "9: \n\t" |
| 116 | // "int $3 \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 defined(PIC) |
| 202 | uint64_t ebxsave; |
| 203 | #endif |
| 204 | #if ARCH_X86_64 |
| 205 | uint64_t retsave; |
| 206 | #endif |
| 207 | |
| 208 | __asm__ volatile( |
| 209 | #if defined(PIC) |
| 210 | "mov %%"REG_b", %5 \n\t" |
| 211 | #if ARCH_X86_64 |
| 212 | "mov -8(%%rsp), %%"REG_a" \n\t" |
| 213 | "mov %%"REG_a", %6 \n\t" |
| 214 | #endif |
| 215 | #else |
| 216 | #if ARCH_X86_64 |
| 217 | "mov -8(%%rsp), %%"REG_a" \n\t" |
| 218 | "mov %%"REG_a", %5 \n\t" |
| 219 | #endif |
| 220 | #endif |
| 221 | "pxor %%mm7, %%mm7 \n\t" |
| 222 | "mov %0, %%"REG_c" \n\t" |
| 223 | "mov %1, %%"REG_D" \n\t" |
| 224 | "mov %2, %%"REG_d" \n\t" |
| 225 | "mov %3, %%"REG_b" \n\t" |
| 226 | "xor %%"REG_a", %%"REG_a" \n\t" // i |
| 227 | PREFETCH" (%%"REG_c") \n\t" |
| 228 | PREFETCH" 32(%%"REG_c") \n\t" |
| 229 | PREFETCH" 64(%%"REG_c") \n\t" |
| 230 | |
| 231 | #if ARCH_X86_64 |
| 232 | #define CALL_MMXEXT_FILTER_CODE \ |
| 233 | "movl (%%"REG_b"), %%esi \n\t"\ |
| 234 | "call *%4 \n\t"\ |
| 235 | "movl (%%"REG_b", %%"REG_a"), %%esi \n\t"\ |
| 236 | "add %%"REG_S", %%"REG_c" \n\t"\ |
| 237 | "add %%"REG_a", %%"REG_D" \n\t"\ |
| 238 | "xor %%"REG_a", %%"REG_a" \n\t"\ |
| 239 | |
| 240 | #else |
| 241 | #define CALL_MMXEXT_FILTER_CODE \ |
| 242 | "movl (%%"REG_b"), %%esi \n\t"\ |
| 243 | "call *%4 \n\t"\ |
| 244 | "addl (%%"REG_b", %%"REG_a"), %%"REG_c" \n\t"\ |
| 245 | "add %%"REG_a", %%"REG_D" \n\t"\ |
| 246 | "xor %%"REG_a", %%"REG_a" \n\t"\ |
| 247 | |
| 248 | #endif /* ARCH_X86_64 */ |
| 249 | |
| 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 | CALL_MMXEXT_FILTER_CODE |
| 256 | CALL_MMXEXT_FILTER_CODE |
| 257 | CALL_MMXEXT_FILTER_CODE |
| 258 | |
| 259 | #if defined(PIC) |
| 260 | "mov %5, %%"REG_b" \n\t" |
| 261 | #if ARCH_X86_64 |
| 262 | "mov %6, %%"REG_a" \n\t" |
| 263 | "mov %%"REG_a", -8(%%rsp) \n\t" |
| 264 | #endif |
| 265 | #else |
| 266 | #if ARCH_X86_64 |
| 267 | "mov %5, %%"REG_a" \n\t" |
| 268 | "mov %%"REG_a", -8(%%rsp) \n\t" |
| 269 | #endif |
| 270 | #endif |
| 271 | :: "m" (src), "m" (dst), "m" (filter), "m" (filterPos), |
| 272 | "m" (mmxextFilterCode) |
| 273 | #if defined(PIC) |
| 274 | ,"m" (ebxsave) |
| 275 | #endif |
| 276 | #if ARCH_X86_64 |
| 277 | ,"m"(retsave) |
| 278 | #endif |
| 279 | : "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D |
| 280 | #if !defined(PIC) |
| 281 | ,"%"REG_b |
| 282 | #endif |
| 283 | ); |
| 284 | |
| 285 | for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) |
| 286 | dst[i] = src[srcW-1]*128; |
| 287 | } |
| 288 | |
| 289 | void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2, |
| 290 | int dstWidth, const uint8_t *src1, |
| 291 | const uint8_t *src2, int srcW, int xInc) |
| 292 | { |
| 293 | int32_t *filterPos = c->hChrFilterPos; |
| 294 | int16_t *filter = c->hChrFilter; |
| 295 | void *mmxextFilterCode = c->chrMmxextFilterCode; |
| 296 | int i; |
| 297 | #if defined(PIC) |
| 298 | DECLARE_ALIGNED(8, uint64_t, ebxsave); |
| 299 | #endif |
| 300 | #if ARCH_X86_64 |
| 301 | DECLARE_ALIGNED(8, uint64_t, retsave); |
| 302 | #endif |
| 303 | |
| 304 | __asm__ volatile( |
| 305 | #if defined(PIC) |
| 306 | "mov %%"REG_b", %7 \n\t" |
| 307 | #if ARCH_X86_64 |
| 308 | "mov -8(%%rsp), %%"REG_a" \n\t" |
| 309 | "mov %%"REG_a", %8 \n\t" |
| 310 | #endif |
| 311 | #else |
| 312 | #if ARCH_X86_64 |
| 313 | "mov -8(%%rsp), %%"REG_a" \n\t" |
| 314 | "mov %%"REG_a", %7 \n\t" |
| 315 | #endif |
| 316 | #endif |
| 317 | "pxor %%mm7, %%mm7 \n\t" |
| 318 | "mov %0, %%"REG_c" \n\t" |
| 319 | "mov %1, %%"REG_D" \n\t" |
| 320 | "mov %2, %%"REG_d" \n\t" |
| 321 | "mov %3, %%"REG_b" \n\t" |
| 322 | "xor %%"REG_a", %%"REG_a" \n\t" // i |
| 323 | PREFETCH" (%%"REG_c") \n\t" |
| 324 | PREFETCH" 32(%%"REG_c") \n\t" |
| 325 | PREFETCH" 64(%%"REG_c") \n\t" |
| 326 | |
| 327 | CALL_MMXEXT_FILTER_CODE |
| 328 | CALL_MMXEXT_FILTER_CODE |
| 329 | CALL_MMXEXT_FILTER_CODE |
| 330 | CALL_MMXEXT_FILTER_CODE |
| 331 | "xor %%"REG_a", %%"REG_a" \n\t" // i |
| 332 | "mov %5, %%"REG_c" \n\t" // src |
| 333 | "mov %6, %%"REG_D" \n\t" // buf2 |
| 334 | PREFETCH" (%%"REG_c") \n\t" |
| 335 | PREFETCH" 32(%%"REG_c") \n\t" |
| 336 | PREFETCH" 64(%%"REG_c") \n\t" |
| 337 | |
| 338 | CALL_MMXEXT_FILTER_CODE |
| 339 | CALL_MMXEXT_FILTER_CODE |
| 340 | CALL_MMXEXT_FILTER_CODE |
| 341 | CALL_MMXEXT_FILTER_CODE |
| 342 | |
| 343 | #if defined(PIC) |
| 344 | "mov %7, %%"REG_b" \n\t" |
| 345 | #if ARCH_X86_64 |
| 346 | "mov %8, %%"REG_a" \n\t" |
| 347 | "mov %%"REG_a", -8(%%rsp) \n\t" |
| 348 | #endif |
| 349 | #else |
| 350 | #if ARCH_X86_64 |
| 351 | "mov %7, %%"REG_a" \n\t" |
| 352 | "mov %%"REG_a", -8(%%rsp) \n\t" |
| 353 | #endif |
| 354 | #endif |
| 355 | :: "m" (src1), "m" (dst1), "m" (filter), "m" (filterPos), |
| 356 | "m" (mmxextFilterCode), "m" (src2), "m"(dst2) |
| 357 | #if defined(PIC) |
| 358 | ,"m" (ebxsave) |
| 359 | #endif |
| 360 | #if ARCH_X86_64 |
| 361 | ,"m"(retsave) |
| 362 | #endif |
| 363 | : "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D |
| 364 | #if !defined(PIC) |
| 365 | ,"%"REG_b |
| 366 | #endif |
| 367 | ); |
| 368 | |
| 369 | for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) { |
| 370 | dst1[i] = src1[srcW-1]*128; |
| 371 | dst2[i] = src2[srcW-1]*128; |
| 372 | } |
| 373 | } |
| 374 | #endif //HAVE_INLINE_ASM |