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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | serge | 1 | /* |
| 2 | * Copyright (C) 2001-2003 Michael Niedermayer |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #include "../swscale_internal.h" |
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| 22 | #include "libavutil/x86/asm.h" |
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| 23 | #include "libavutil/x86/cpu.h" |
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| 24 | |||
| 25 | #define RET 0xC3 // near return opcode for x86 |
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| 26 | #define PREFETCH "prefetchnta" |
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| 27 | |||
| 28 | #if HAVE_INLINE_ASM |
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| 29 | av_cold int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode, |
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| 30 | int16_t *filter, int32_t *filterPos, |
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| 31 | int numSplits) |
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| 32 | { |
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| 33 | uint8_t *fragmentA; |
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| 34 | x86_reg imm8OfPShufW1A; |
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| 35 | x86_reg imm8OfPShufW2A; |
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| 36 | x86_reg fragmentLengthA; |
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| 37 | uint8_t *fragmentB; |
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| 38 | x86_reg imm8OfPShufW1B; |
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| 39 | x86_reg imm8OfPShufW2B; |
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| 40 | x86_reg fragmentLengthB; |
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| 41 | int fragmentPos; |
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| 42 | |||
| 43 | int xpos, i; |
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| 44 | |||
| 45 | // create an optimized horizontal scaling routine |
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| 46 | /* This scaler is made of runtime-generated MMXEXT code using specially tuned |
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| 47 | * pshufw instructions. For every four output pixels, if four input pixels |
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| 48 | * are enough for the fast bilinear scaling, then a chunk of fragmentB is |
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| 49 | * used. If five input pixels are needed, then a chunk of fragmentA is used. |
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| 50 | */ |
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| 51 | |||
| 52 | // code fragment |
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| 53 | |||
| 54 | __asm__ volatile ( |
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| 55 | "jmp 9f \n\t" |
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| 56 | // Begin |
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| 57 | "0: \n\t" |
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| 58 | "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" |
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| 59 | "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" |
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| 60 | "movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t" |
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| 61 | "punpcklbw %%mm7, %%mm1 \n\t" |
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| 62 | "punpcklbw %%mm7, %%mm0 \n\t" |
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| 63 | "pshufw $0xFF, %%mm1, %%mm1 \n\t" |
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| 64 | "1: \n\t" |
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| 65 | "pshufw $0xFF, %%mm0, %%mm0 \n\t" |
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| 66 | "2: \n\t" |
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| 67 | "psubw %%mm1, %%mm0 \n\t" |
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| 68 | "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t" |
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| 69 | "pmullw %%mm3, %%mm0 \n\t" |
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| 70 | "psllw $7, %%mm1 \n\t" |
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| 71 | "paddw %%mm1, %%mm0 \n\t" |
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| 72 | |||
| 73 | "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t" |
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| 74 | |||
| 75 | "add $8, %%"REG_a" \n\t" |
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| 76 | // End |
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| 77 | "9: \n\t" |
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| 78 | "lea " LOCAL_MANGLE(0b) ", %0 \n\t" |
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| 79 | "lea " LOCAL_MANGLE(1b) ", %1 \n\t" |
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| 80 | "lea " LOCAL_MANGLE(2b) ", %2 \n\t" |
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| 81 | "dec %1 \n\t" |
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| 82 | "dec %2 \n\t" |
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| 83 | "sub %0, %1 \n\t" |
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| 84 | "sub %0, %2 \n\t" |
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| 85 | "lea " LOCAL_MANGLE(9b) ", %3 \n\t" |
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| 86 | "sub %0, %3 \n\t" |
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| 87 | |||
| 88 | |||
| 89 | : "=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A), |
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| 90 | "=r" (fragmentLengthA) |
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| 91 | ); |
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| 92 | |||
| 93 | __asm__ volatile ( |
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| 94 | "jmp 9f \n\t" |
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| 95 | // Begin |
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| 96 | "0: \n\t" |
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| 97 | "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" |
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| 98 | "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" |
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| 99 | "punpcklbw %%mm7, %%mm0 \n\t" |
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| 100 | "pshufw $0xFF, %%mm0, %%mm1 \n\t" |
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| 101 | "1: \n\t" |
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| 102 | "pshufw $0xFF, %%mm0, %%mm0 \n\t" |
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| 103 | "2: \n\t" |
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| 104 | "psubw %%mm1, %%mm0 \n\t" |
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| 105 | "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t" |
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| 106 | "pmullw %%mm3, %%mm0 \n\t" |
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| 107 | "psllw $7, %%mm1 \n\t" |
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| 108 | "paddw %%mm1, %%mm0 \n\t" |
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| 109 | |||
| 110 | "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t" |
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| 111 | |||
| 112 | "add $8, %%"REG_a" \n\t" |
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| 113 | // End |
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| 114 | "9: \n\t" |
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| 115 | "lea " LOCAL_MANGLE(0b) ", %0 \n\t" |
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| 116 | "lea " LOCAL_MANGLE(1b) ", %1 \n\t" |
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| 117 | "lea " LOCAL_MANGLE(2b) ", %2 \n\t" |
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| 118 | "dec %1 \n\t" |
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| 119 | "dec %2 \n\t" |
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| 120 | "sub %0, %1 \n\t" |
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| 121 | "sub %0, %2 \n\t" |
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| 122 | "lea " LOCAL_MANGLE(9b) ", %3 \n\t" |
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| 123 | "sub %0, %3 \n\t" |
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| 124 | |||
| 125 | |||
| 126 | : "=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B), |
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| 127 | "=r" (fragmentLengthB) |
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| 128 | ); |
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| 129 | |||
| 130 | xpos = 0; // lumXInc/2 - 0x8000; // difference between pixel centers |
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| 131 | fragmentPos = 0; |
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| 132 | |||
| 133 | for (i = 0; i < dstW / numSplits; i++) { |
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| 134 | int xx = xpos >> 16; |
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| 135 | |||
| 136 | if ((i & 3) == 0) { |
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| 137 | int a = 0; |
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| 138 | int b = ((xpos + xInc) >> 16) - xx; |
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| 139 | int c = ((xpos + xInc * 2) >> 16) - xx; |
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| 140 | int d = ((xpos + xInc * 3) >> 16) - xx; |
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| 141 | int inc = (d + 1 < 4); |
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| 142 | uint8_t *fragment = inc ? fragmentB : fragmentA; |
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| 143 | x86_reg imm8OfPShufW1 = inc ? imm8OfPShufW1B : imm8OfPShufW1A; |
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| 144 | x86_reg imm8OfPShufW2 = inc ? imm8OfPShufW2B : imm8OfPShufW2A; |
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| 145 | x86_reg fragmentLength = inc ? fragmentLengthB : fragmentLengthA; |
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| 146 | int maxShift = 3 - (d + inc); |
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| 147 | int shift = 0; |
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| 148 | |||
| 149 | if (filterCode) { |
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| 150 | filter[i] = ((xpos & 0xFFFF) ^ 0xFFFF) >> 9; |
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| 151 | filter[i + 1] = (((xpos + xInc) & 0xFFFF) ^ 0xFFFF) >> 9; |
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| 152 | filter[i + 2] = (((xpos + xInc * 2) & 0xFFFF) ^ 0xFFFF) >> 9; |
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| 153 | filter[i + 3] = (((xpos + xInc * 3) & 0xFFFF) ^ 0xFFFF) >> 9; |
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| 154 | filterPos[i / 2] = xx; |
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| 155 | |||
| 156 | memcpy(filterCode + fragmentPos, fragment, fragmentLength); |
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| 157 | |||
| 158 | filterCode[fragmentPos + imm8OfPShufW1] = (a + inc) | |
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| 159 | ((b + inc) << 2) | |
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| 160 | ((c + inc) << 4) | |
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| 161 | ((d + inc) << 6); |
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| 162 | filterCode[fragmentPos + imm8OfPShufW2] = a | (b << 2) | |
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| 163 | (c << 4) | |
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| 164 | (d << 6); |
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| 165 | |||
| 166 | if (i + 4 - inc >= dstW) |
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| 167 | shift = maxShift; // avoid overread |
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| 168 | else if ((filterPos[i / 2] & 3) <= maxShift) |
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| 169 | shift = filterPos[i / 2] & 3; // align |
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| 170 | |||
| 171 | if (shift && i >= shift) { |
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| 172 | filterCode[fragmentPos + imm8OfPShufW1] += 0x55 * shift; |
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| 173 | filterCode[fragmentPos + imm8OfPShufW2] += 0x55 * shift; |
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| 174 | filterPos[i / 2] -= shift; |
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| 175 | } |
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| 176 | } |
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| 177 | |||
| 178 | fragmentPos += fragmentLength; |
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| 179 | |||
| 180 | if (filterCode) |
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| 181 | filterCode[fragmentPos] = RET; |
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| 182 | } |
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| 183 | xpos += xInc; |
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| 184 | } |
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| 185 | if (filterCode) |
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| 186 | filterPos[((i / 2) + 1) & (~1)] = xpos >> 16; // needed to jump to the next part |
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| 187 | |||
| 188 | return fragmentPos + 1; |
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| 189 | } |
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| 190 | |||
| 191 | void ff_hyscale_fast_mmxext(SwsContext *c, int16_t *dst, |
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| 192 | int dstWidth, const uint8_t *src, |
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| 193 | int srcW, int xInc) |
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| 194 | { |
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| 195 | int32_t *filterPos = c->hLumFilterPos; |
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| 196 | int16_t *filter = c->hLumFilter; |
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| 197 | void *mmxextFilterCode = c->lumMmxextFilterCode; |
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| 198 | int i; |
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| 199 | #if ARCH_X86_64 |
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| 200 | uint64_t retsave; |
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| 201 | #else |
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| 202 | #if defined(PIC) |
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| 203 | uint64_t ebxsave; |
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| 204 | #endif |
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| 205 | #endif |
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| 206 | |||
| 207 | __asm__ volatile( |
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| 208 | #if ARCH_X86_64 |
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| 209 | "mov -8(%%rsp), %%"REG_a" \n\t" |
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| 210 | "mov %%"REG_a", %5 \n\t" // retsave |
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| 211 | #else |
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| 212 | #if defined(PIC) |
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| 213 | "mov %%"REG_b", %5 \n\t" // ebxsave |
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| 214 | #endif |
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| 215 | #endif |
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| 216 | "pxor %%mm7, %%mm7 \n\t" |
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| 217 | "mov %0, %%"REG_c" \n\t" |
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| 218 | "mov %1, %%"REG_D" \n\t" |
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| 219 | "mov %2, %%"REG_d" \n\t" |
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| 220 | "mov %3, %%"REG_b" \n\t" |
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| 221 | "xor %%"REG_a", %%"REG_a" \n\t" // i |
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| 222 | PREFETCH" (%%"REG_c") \n\t" |
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| 223 | PREFETCH" 32(%%"REG_c") \n\t" |
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| 224 | PREFETCH" 64(%%"REG_c") \n\t" |
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| 225 | |||
| 226 | #if ARCH_X86_64 |
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| 227 | #define CALL_MMXEXT_FILTER_CODE \ |
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| 228 | "movl (%%"REG_b"), %%esi \n\t"\ |
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| 229 | "call *%4 \n\t"\ |
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| 230 | "movl (%%"REG_b", %%"REG_a"), %%esi \n\t"\ |
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| 231 | "add %%"REG_S", %%"REG_c" \n\t"\ |
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| 232 | "add %%"REG_a", %%"REG_D" \n\t"\ |
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| 233 | "xor %%"REG_a", %%"REG_a" \n\t"\ |
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| 234 | |||
| 235 | #else |
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| 236 | #define CALL_MMXEXT_FILTER_CODE \ |
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| 237 | "movl (%%"REG_b"), %%esi \n\t"\ |
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| 238 | "call *%4 \n\t"\ |
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| 239 | "addl (%%"REG_b", %%"REG_a"), %%"REG_c" \n\t"\ |
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| 240 | "add %%"REG_a", %%"REG_D" \n\t"\ |
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| 241 | "xor %%"REG_a", %%"REG_a" \n\t"\ |
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| 242 | |||
| 243 | #endif /* ARCH_X86_64 */ |
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| 244 | |||
| 245 | CALL_MMXEXT_FILTER_CODE |
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| 246 | CALL_MMXEXT_FILTER_CODE |
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| 247 | CALL_MMXEXT_FILTER_CODE |
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| 248 | CALL_MMXEXT_FILTER_CODE |
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| 249 | CALL_MMXEXT_FILTER_CODE |
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| 250 | CALL_MMXEXT_FILTER_CODE |
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| 251 | CALL_MMXEXT_FILTER_CODE |
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| 252 | CALL_MMXEXT_FILTER_CODE |
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| 253 | |||
| 254 | #if ARCH_X86_64 |
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| 255 | "mov %5, %%"REG_a" \n\t" |
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| 256 | "mov %%"REG_a", -8(%%rsp) \n\t" |
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| 257 | #else |
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| 258 | #if defined(PIC) |
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| 259 | "mov %5, %%"REG_b" \n\t" |
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| 260 | #endif |
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| 261 | #endif |
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| 262 | :: "m" (src), "m" (dst), "m" (filter), "m" (filterPos), |
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| 263 | "m" (mmxextFilterCode) |
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| 264 | #if ARCH_X86_64 |
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| 265 | ,"m"(retsave) |
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| 266 | #else |
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| 267 | #if defined(PIC) |
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| 268 | ,"m" (ebxsave) |
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| 269 | #endif |
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| 270 | #endif |
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| 271 | : "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D |
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| 272 | #if ARCH_X86_64 || !defined(PIC) |
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| 273 | ,"%"REG_b |
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| 274 | #endif |
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| 275 | ); |
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| 276 | |||
| 277 | for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) |
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| 278 | dst[i] = src[srcW-1]*128; |
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| 279 | } |
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| 280 | |||
| 281 | void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2, |
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| 282 | int dstWidth, const uint8_t *src1, |
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| 283 | const uint8_t *src2, int srcW, int xInc) |
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| 284 | { |
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| 285 | int32_t *filterPos = c->hChrFilterPos; |
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| 286 | int16_t *filter = c->hChrFilter; |
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| 287 | void *mmxextFilterCode = c->chrMmxextFilterCode; |
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| 288 | int i; |
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| 289 | #if ARCH_X86_64 |
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| 290 | DECLARE_ALIGNED(8, uint64_t, retsave); |
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| 291 | #else |
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| 292 | #if defined(PIC) |
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| 293 | DECLARE_ALIGNED(8, uint64_t, ebxsave); |
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| 294 | #endif |
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| 295 | #endif |
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| 296 | __asm__ volatile( |
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| 297 | #if ARCH_X86_64 |
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| 298 | "mov -8(%%rsp), %%"REG_a" \n\t" |
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| 299 | "mov %%"REG_a", %7 \n\t" // retsave |
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| 300 | #else |
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| 301 | #if defined(PIC) |
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| 302 | "mov %%"REG_b", %7 \n\t" // ebxsave |
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| 303 | #endif |
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| 304 | #endif |
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| 305 | "pxor %%mm7, %%mm7 \n\t" |
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| 306 | "mov %0, %%"REG_c" \n\t" |
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| 307 | "mov %1, %%"REG_D" \n\t" |
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| 308 | "mov %2, %%"REG_d" \n\t" |
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| 309 | "mov %3, %%"REG_b" \n\t" |
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| 310 | "xor %%"REG_a", %%"REG_a" \n\t" // i |
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| 311 | PREFETCH" (%%"REG_c") \n\t" |
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| 312 | PREFETCH" 32(%%"REG_c") \n\t" |
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| 313 | PREFETCH" 64(%%"REG_c") \n\t" |
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| 314 | |||
| 315 | CALL_MMXEXT_FILTER_CODE |
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| 316 | CALL_MMXEXT_FILTER_CODE |
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| 317 | CALL_MMXEXT_FILTER_CODE |
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| 318 | CALL_MMXEXT_FILTER_CODE |
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| 319 | "xor %%"REG_a", %%"REG_a" \n\t" // i |
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| 320 | "mov %5, %%"REG_c" \n\t" // src2 |
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| 321 | "mov %6, %%"REG_D" \n\t" // dst2 |
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| 322 | PREFETCH" (%%"REG_c") \n\t" |
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| 323 | PREFETCH" 32(%%"REG_c") \n\t" |
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| 324 | PREFETCH" 64(%%"REG_c") \n\t" |
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| 325 | |||
| 326 | CALL_MMXEXT_FILTER_CODE |
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| 327 | CALL_MMXEXT_FILTER_CODE |
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| 328 | CALL_MMXEXT_FILTER_CODE |
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| 329 | CALL_MMXEXT_FILTER_CODE |
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| 330 | |||
| 331 | #if ARCH_X86_64 |
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| 332 | "mov %7, %%"REG_a" \n\t" |
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| 333 | "mov %%"REG_a", -8(%%rsp) \n\t" |
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| 334 | #else |
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| 335 | #if defined(PIC) |
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| 336 | "mov %7, %%"REG_b" \n\t" |
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| 337 | #endif |
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| 338 | #endif |
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| 339 | :: "m" (src1), "m" (dst1), "m" (filter), "m" (filterPos), |
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| 340 | "m" (mmxextFilterCode), "m" (src2), "m"(dst2) |
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| 341 | #if ARCH_X86_64 |
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| 342 | ,"m"(retsave) |
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| 343 | #else |
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| 344 | #if defined(PIC) |
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| 345 | ,"m" (ebxsave) |
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| 346 | #endif |
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| 347 | #endif |
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| 348 | : "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D |
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| 349 | #if ARCH_X86_64 || !defined(PIC) |
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| 350 | ,"%"REG_b |
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| 351 | #endif |
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| 352 | ); |
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| 353 | |||
| 354 | for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) { |
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| 355 | dst1[i] = src1[srcW-1]*128; |
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| 356 | dst2[i] = src2[srcW-1]*128; |
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| 357 | } |
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| 358 | } |
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| 359 | #endif //HAVE_INLINE_ASM |