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4349 | Serge | 1 | /* |
2 | * Copyright (c) 2007 Luca Barbato |
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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 | /** |
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22 | ** @file |
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23 | ** integer misc ops. |
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24 | **/ |
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25 | |||
26 | #include "config.h" |
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27 | #if HAVE_ALTIVEC_H |
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28 | #include |
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29 | #endif |
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30 | |||
31 | #include "libavutil/attributes.h" |
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32 | #include "libavutil/ppc/types_altivec.h" |
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33 | #include "libavcodec/dsputil.h" |
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34 | |||
35 | #include "dsputil_altivec.h" |
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36 | |||
37 | static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2, |
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38 | int size) { |
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39 | int i, size16; |
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40 | vector signed char vpix1; |
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41 | vector signed short vpix2, vdiff, vpix1l,vpix1h; |
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42 | union { vector signed int vscore; |
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43 | int32_t score[4]; |
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44 | } u; |
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45 | u.vscore = vec_splat_s32(0); |
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46 | // |
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47 | //XXX lazy way, fix it later |
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48 | |||
49 | #define vec_unaligned_load(b) \ |
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50 | vec_perm(vec_ld(0,b),vec_ld(15,b),vec_lvsl(0, b)); |
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51 | |||
52 | size16 = size >> 4; |
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53 | while(size16) { |
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54 | // score += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]); |
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55 | //load pix1 and the first batch of pix2 |
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56 | |||
57 | vpix1 = vec_unaligned_load(pix1); |
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58 | vpix2 = vec_unaligned_load(pix2); |
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59 | pix2 += 8; |
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60 | //unpack |
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61 | vpix1h = vec_unpackh(vpix1); |
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62 | vdiff = vec_sub(vpix1h, vpix2); |
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63 | vpix1l = vec_unpackl(vpix1); |
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64 | // load another batch from pix2 |
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65 | vpix2 = vec_unaligned_load(pix2); |
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66 | u.vscore = vec_msum(vdiff, vdiff, u.vscore); |
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67 | vdiff = vec_sub(vpix1l, vpix2); |
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68 | u.vscore = vec_msum(vdiff, vdiff, u.vscore); |
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69 | pix1 += 16; |
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70 | pix2 += 8; |
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71 | size16--; |
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72 | } |
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73 | u.vscore = vec_sums(u.vscore, vec_splat_s32(0)); |
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74 | |||
75 | size %= 16; |
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76 | for (i = 0; i < size; i++) { |
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77 | u.score[3] += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]); |
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78 | } |
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79 | return u.score[3]; |
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80 | } |
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81 | |||
82 | static int32_t scalarproduct_int16_altivec(const int16_t *v1, const int16_t *v2, |
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83 | int order) |
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84 | { |
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85 | int i; |
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86 | LOAD_ZERO; |
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87 | register vec_s16 vec1; |
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88 | register vec_s32 res = vec_splat_s32(0), t; |
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89 | int32_t ires; |
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90 | |||
91 | for(i = 0; i < order; i += 8){ |
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92 | vec1 = vec_unaligned_load(v1); |
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93 | t = vec_msum(vec1, vec_ld(0, v2), zero_s32v); |
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94 | res = vec_sums(t, res); |
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95 | v1 += 8; |
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96 | v2 += 8; |
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97 | } |
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98 | res = vec_splat(res, 3); |
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99 | vec_ste(res, 0, &ires); |
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100 | return ires; |
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101 | } |
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102 | |||
103 | static int32_t scalarproduct_and_madd_int16_altivec(int16_t *v1, const int16_t *v2, const int16_t *v3, int order, int mul) |
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104 | { |
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105 | LOAD_ZERO; |
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106 | vec_s16 *pv1 = (vec_s16*)v1; |
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107 | register vec_s16 muls = {mul,mul,mul,mul,mul,mul,mul,mul}; |
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108 | register vec_s16 t0, t1, i0, i1, i4; |
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109 | register vec_s16 i2 = vec_ld(0, v2), i3 = vec_ld(0, v3); |
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110 | register vec_s32 res = zero_s32v; |
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111 | register vec_u8 align = vec_lvsl(0, v2); |
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112 | int32_t ires; |
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113 | order >>= 4; |
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114 | do { |
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115 | i1 = vec_ld(16, v2); |
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116 | t0 = vec_perm(i2, i1, align); |
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117 | i2 = vec_ld(32, v2); |
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118 | t1 = vec_perm(i1, i2, align); |
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119 | i0 = pv1[0]; |
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120 | i1 = pv1[1]; |
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121 | res = vec_msum(t0, i0, res); |
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122 | res = vec_msum(t1, i1, res); |
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123 | i4 = vec_ld(16, v3); |
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124 | t0 = vec_perm(i3, i4, align); |
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125 | i3 = vec_ld(32, v3); |
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126 | t1 = vec_perm(i4, i3, align); |
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127 | pv1[0] = vec_mladd(t0, muls, i0); |
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128 | pv1[1] = vec_mladd(t1, muls, i1); |
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129 | pv1 += 2; |
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130 | v2 += 16; |
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131 | v3 += 16; |
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132 | } while(--order); |
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133 | res = vec_splat(vec_sums(res, zero_s32v), 3); |
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134 | vec_ste(res, 0, &ires); |
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135 | return ires; |
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136 | } |
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137 | |||
138 | av_cold void ff_int_init_altivec(DSPContext *c, AVCodecContext *avctx) |
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139 | { |
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140 | c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec; |
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141 | c->scalarproduct_int16 = scalarproduct_int16_altivec; |
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142 | c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_altivec; |
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143 | }>> |