1/* 2 * Alpha optimized DSP utils 3 * Copyright (c) 2002 Falk Hueffner <falk@debian.org> 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include "libavutil/attributes.h" 23#include "libavcodec/dsputil.h" 24#include "dsputil_alpha.h" 25#include "asm.h" 26 27#if 0 28/* These functions were the base for the optimized assembler routines, 29 and remain here for documentation purposes. */ 30static void put_pixels_clamped_mvi(const int16_t *block, uint8_t *pixels, 31 ptrdiff_t line_size) 32{ 33 int i = 8; 34 uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */ 35 36 do { 37 uint64_t shorts0, shorts1; 38 39 shorts0 = ldq(block); 40 shorts0 = maxsw4(shorts0, 0); 41 shorts0 = minsw4(shorts0, clampmask); 42 stl(pkwb(shorts0), pixels); 43 44 shorts1 = ldq(block + 4); 45 shorts1 = maxsw4(shorts1, 0); 46 shorts1 = minsw4(shorts1, clampmask); 47 stl(pkwb(shorts1), pixels + 4); 48 49 pixels += line_size; 50 block += 8; 51 } while (--i); 52} 53 54void add_pixels_clamped_mvi(const int16_t *block, uint8_t *pixels, 55 ptrdiff_t line_size) 56{ 57 int h = 8; 58 /* Keep this function a leaf function by generating the constants 59 manually (mainly for the hack value ;-). */ 60 uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */ 61 uint64_t signmask = zap(-1, 0x33); 62 signmask ^= signmask >> 1; /* 0x8000800080008000 */ 63 64 do { 65 uint64_t shorts0, pix0, signs0; 66 uint64_t shorts1, pix1, signs1; 67 68 shorts0 = ldq(block); 69 shorts1 = ldq(block + 4); 70 71 pix0 = unpkbw(ldl(pixels)); 72 /* Signed subword add (MMX paddw). */ 73 signs0 = shorts0 & signmask; 74 shorts0 &= ~signmask; 75 shorts0 += pix0; 76 shorts0 ^= signs0; 77 /* Clamp. */ 78 shorts0 = maxsw4(shorts0, 0); 79 shorts0 = minsw4(shorts0, clampmask); 80 81 /* Next 4. */ 82 pix1 = unpkbw(ldl(pixels + 4)); 83 signs1 = shorts1 & signmask; 84 shorts1 &= ~signmask; 85 shorts1 += pix1; 86 shorts1 ^= signs1; 87 shorts1 = maxsw4(shorts1, 0); 88 shorts1 = minsw4(shorts1, clampmask); 89 90 stl(pkwb(shorts0), pixels); 91 stl(pkwb(shorts1), pixels + 4); 92 93 pixels += line_size; 94 block += 8; 95 } while (--h); 96} 97#endif 98 99av_cold void ff_dsputil_init_alpha(DSPContext *c, AVCodecContext *avctx) 100{ 101 /* amask clears all bits that correspond to present features. */ 102 if (amask(AMASK_MVI) == 0) { 103 c->sad[0] = pix_abs16x16_mvi_asm; 104 c->sad[1] = pix_abs8x8_mvi; 105 c->pix_abs[0][0] = pix_abs16x16_mvi_asm; 106 c->pix_abs[1][0] = pix_abs8x8_mvi; 107 c->pix_abs[0][1] = pix_abs16x16_x2_mvi; 108 c->pix_abs[0][2] = pix_abs16x16_y2_mvi; 109 c->pix_abs[0][3] = pix_abs16x16_xy2_mvi; 110 } 111 112} 113