[154] | 1 | #include "stdio.h" |
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| 2 | |
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| 3 | //////////////////////////////////// |
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| 4 | // Image parameters |
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| 5 | |
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| 6 | #define PIXEL_SIZE 2 |
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| 7 | #define NL 1024 |
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| 8 | #define NP 1024 |
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| 9 | #define BLOCK_SIZE 1512 |
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| 10 | |
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| 11 | #define PRINTF if(lid==0) tty_printf |
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| 12 | |
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| 13 | #define TA(c,l,p) (A[c][((NP)*(l))+(p)]) |
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| 14 | #define TB(c,p,l) (B[c][((NL)*(p))+(l)]) |
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| 15 | #define TC(c,l,p) (C[c][((NP)*(l))+(p)]) |
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| 16 | #define TD(c,l,p) (D[c][((NP)*(l))+(p)]) |
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| 17 | |
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| 18 | #define max(x,y) ((x) > (y) ? (x) : (y)) |
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| 19 | #define min(x,y) ((x) < (y) ? (x) : (y)) |
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| 20 | |
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| 21 | /////////////////////////////////////////// |
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| 22 | // tricks to read parameters from ldscript |
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| 23 | /////////////////////////////////////////// |
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| 24 | |
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| 25 | struct plaf; |
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| 26 | |
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| 27 | extern struct plaf seg_heap_base; |
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| 28 | extern struct plaf NB_PROCS; |
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| 29 | extern struct plaf NB_CLUSTERS; |
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| 30 | |
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| 31 | ///////////// |
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| 32 | void main() |
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| 33 | { |
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| 34 | |
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| 35 | ////////////////////////////////// |
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| 36 | // convolution kernel parameters |
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| 37 | // The content of this section is |
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| 38 | // Philips proprietary information. |
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| 39 | /////////////////////////////////// |
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| 40 | |
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| 41 | int vrange = 17; |
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| 42 | int vnorm = 115; |
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| 43 | int vf[35]; |
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| 44 | vf[0] = 1; |
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| 45 | vf[1] = 1; |
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| 46 | vf[2] = 2; |
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| 47 | vf[3] = 2; |
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| 48 | vf[4] = 2; |
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| 49 | vf[5] = 2; |
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| 50 | vf[6] = 3; |
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| 51 | vf[7] = 3; |
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| 52 | vf[8] = 3; |
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| 53 | vf[9] = 4; |
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| 54 | vf[10] = 4; |
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| 55 | vf[11] = 4; |
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| 56 | vf[12] = 4; |
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| 57 | vf[13] = 5; |
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| 58 | vf[14] = 5; |
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| 59 | vf[15] = 5; |
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| 60 | vf[16] = 5; |
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| 61 | vf[17] = 5; |
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| 62 | vf[18] = 5; |
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| 63 | vf[19] = 5; |
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| 64 | vf[20] = 5; |
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| 65 | vf[21] = 5; |
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| 66 | vf[22] = 4; |
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| 67 | vf[23] = 4; |
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| 68 | vf[24] = 4; |
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| 69 | vf[25] = 4; |
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| 70 | vf[26] = 3; |
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| 71 | vf[27] = 3; |
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| 72 | vf[28] = 3; |
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| 73 | vf[29] = 2; |
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| 74 | vf[30] = 2; |
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| 75 | vf[31] = 2; |
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| 76 | vf[32] = 2; |
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| 77 | vf[33] = 1; |
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| 78 | vf[34] = 1; |
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| 79 | |
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| 80 | int hrange = 100; |
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| 81 | int hnorm = 201; |
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| 82 | |
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| 83 | unsigned int date = 0; |
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| 84 | unsigned int delta = 0; |
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| 85 | |
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| 86 | int c; // cluster index for loops |
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| 87 | int l; // line index for loops |
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| 88 | int p; // pixel index for loops |
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| 89 | int x; // filter index for loops |
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| 90 | |
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| 91 | int pid = procid(); // processor id |
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| 92 | int nprocs = (unsigned int)&NB_PROCS; // number of processors per cluster |
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| 93 | int nclusters = (unsigned int)&NB_CLUSTERS; // number of clusters |
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| 94 | int lid = pid%nprocs; // local processor id |
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| 95 | int cid = pid/nprocs; // local processor id |
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| 96 | int base = (unsigned int)&seg_heap_base; // base address for shared buffers |
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| 97 | int increment = (0x80000000 / nclusters) * 2; // cluster increment |
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| 98 | int ntasks = nclusters * nprocs; // number of tasks |
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| 99 | int nblocks = (NP*NL*PIXEL_SIZE)/BLOCK_SIZE; // number of blocks per image |
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| 100 | |
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| 101 | int lines_per_task = NL/ntasks; // number of lines per task |
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| 102 | int lines_per_cluster = NL/nclusters; // number of lines per cluster |
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| 103 | int columns_per_task = NP/ntasks; // number of columns per task |
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| 104 | int columns_per_cluster = NP/nclusters; // number of columns per cluster |
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| 105 | |
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| 106 | PRINTF("\n *** Processor %d entering main at cycle %d ***\n\n", pid, proctime()); |
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| 107 | |
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| 108 | ////////////////////////// |
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| 109 | // parameters checking |
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| 110 | if( (nprocs != 1) && (nprocs != 2) && (nprocs != 4) ) |
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| 111 | { |
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| 112 | PRINTF("NB_PROCS must be 1, 2 or 4\n"); |
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| 113 | while(1); |
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| 114 | } |
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| 115 | if( (nclusters != 4) && (nclusters != 8) && (nclusters != 16) && |
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| 116 | (nclusters != 32) && (nclusters != 64) && (nclusters !=128) && (nclusters != 256) ) |
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| 117 | { |
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| 118 | PRINTF("NB_CLUSTERS must be a power of 2 between 4 and 256\n"); |
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| 119 | while(1); |
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| 120 | } |
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| 121 | if( pid >= ntasks ) |
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| 122 | { |
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| 123 | PRINTF("processor id %d larger than NB_CLUSTERS*NB_PROCS\n", pid); |
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| 124 | while(1); |
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| 125 | } |
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| 126 | if ( NL % nclusters != 0 ) |
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| 127 | { |
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| 128 | PRINTF("NB_CLUSTERS must be a divider of NL"); |
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| 129 | while(1); |
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| 130 | } |
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| 131 | if( NP % nclusters != 0 ) |
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| 132 | { |
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| 133 | PRINTF("NB_CLUSTERS must be a divider of NP"); |
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| 134 | while(1); |
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| 135 | } |
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| 136 | |
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| 137 | ////////////////////////////////////////////////////////////////// |
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| 138 | // Arrays of pointers on the shared, distributed buffers |
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| 139 | // containing the images (sized for the worst case : 256 clusters) |
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| 140 | unsigned short* A[256]; |
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| 141 | int* B[256]; |
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| 142 | int* C[256]; |
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| 143 | int* D[256]; |
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| 144 | |
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| 145 | // The shared, distributed buffers addresses are computed |
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| 146 | // from the seg_heap_base value defined in the ldscript file |
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| 147 | // and from the cluster increment = 4Gbytes/nclusters. |
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| 148 | // These arrays of pointers are identical and |
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| 149 | // replicated in the stack of each task |
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| 150 | for( c=0 ; c<nclusters ; c++) |
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| 151 | { |
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| 152 | A[c] = (unsigned short*)(base + increment*c); |
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| 153 | B[c] = (int*)(base + 4*NP*NL/nclusters + increment*c); |
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| 154 | C[c] = (int*)(base + 8*NP*NL/nclusters + increment*c); |
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| 155 | D[c] = (int*)(base + 12*NP*NL/nclusters + increment*c); |
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| 156 | } |
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| 157 | |
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| 158 | unsigned char* line_buf = (unsigned char*)(base + 2*NP*NL/nclusters + increment*c); |
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| 159 | |
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| 160 | PRINTF("NCLUSTERS = %d\n", nclusters); |
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| 161 | PRINTF("NPROCS = %d\n\n", nprocs); |
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| 162 | |
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| 163 | PRINTF("*** starting barrier init at cycle %d ***\n", proctime()); |
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| 164 | |
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| 165 | // barriers initialization |
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| 166 | barrier_init(0, ntasks); |
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| 167 | barrier_init(1, ntasks); |
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| 168 | barrier_init(2, ntasks); |
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| 169 | |
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| 170 | PRINTF("*** completing barrier init at cycle %d ***\n", proctime()); |
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| 171 | |
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| 172 | //////////////////////////////////////////////////////// |
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| 173 | // pseudo parallel load from disk to A[c] buffers |
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| 174 | // only task running on processor with (lid==0) does it |
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| 175 | // nblocks/nclusters are loaded in each cluster |
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| 176 | |
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| 177 | if ( lid == 0 ) |
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| 178 | { |
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| 179 | delta = proctime() - date; |
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| 180 | date = date + delta; |
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| 181 | PRINTF("\n *** Starting load at cycle %d (%d)\n", date, delta); |
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| 182 | |
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| 183 | if( ioc_read(nblocks*cid/nclusters, |
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| 184 | A[cid] , |
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| 185 | nblocks/nclusters) ) |
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| 186 | { |
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| 187 | PRINTF("echec ioc_read\n"); |
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| 188 | while(1); |
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| 189 | } |
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| 190 | if ( ioc_completed() ) |
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| 191 | { |
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| 192 | PRINTF("echec ioc_completed\n"); |
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| 193 | while(1); |
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| 194 | } |
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| 195 | |
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| 196 | delta = proctime() - date; |
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| 197 | date = date + delta; |
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| 198 | PRINTF(" *** Completing load at cycle %d (%d)\n", date, delta); |
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| 199 | } |
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| 200 | |
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| 201 | barrier_wait(0); |
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| 202 | |
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| 203 | ////////////////////////////////////////////////////////// |
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| 204 | // parallel horizontal filter : |
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| 205 | // B <= transpose(FH(A)) |
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| 206 | // D <= A - FH(A) |
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| 207 | // each task computes (NL/ntasks) lines |
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| 208 | |
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| 209 | delta = proctime() - date; |
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| 210 | date = date + delta; |
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| 211 | PRINTF("\n *** starting horizontal filter at cycle %d (%d)\n", date, delta); |
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| 212 | |
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| 213 | // l = line index in the cluster / p = pixel index |
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| 214 | for ( l = lines_per_task*lid ; l < lines_per_task*(lid+1) ; l++) |
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| 215 | { |
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| 216 | // The image must be extended : |
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| 217 | // if (p<0) TA(cid,l,p) == TA(cid,l,0) |
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| 218 | // if (p>NP-1) TA(cid,l,p) == TA(cid,l,NL-1) |
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| 219 | // We use the spécific values of the horizontal ep-filter for optimisation: |
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| 220 | // sum(p) = sum(p-1) + TA[p+hrange] - TA[p-hrange-1] |
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| 221 | // To minimize the number of tests, the loop on pixels is split in three domains |
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| 222 | |
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| 223 | int sum = (hrange+2)*TA(cid,l,0); |
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| 224 | for ( x = 1 ; x < hrange ; x++) sum = sum + TA(cid,l,x); |
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| 225 | |
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| 226 | // first domain : from 0 to hrange |
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| 227 | for ( p = 0 ; p < hrange+1 ; p++) |
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| 228 | { |
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| 229 | sum = sum + TA(cid,l,p+hrange) - TA(cid,l,0); |
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| 230 | TB((p/columns_per_cluster),(p%columns_per_cluster),(cid*lines_per_cluster+l)) = sum/hnorm; |
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| 231 | TD(cid,l,p) = TA(cid,l,p) - sum/hnorm; |
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| 232 | } |
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| 233 | // second domain : from (hrange+1) to (NP-hrange-1) |
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| 234 | for ( p = hrange+1 ; p < NP-hrange ; p++) |
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| 235 | { |
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| 236 | sum = sum + TA(cid,l,p+hrange) - TA(cid,l,p-hrange-1); |
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| 237 | TB((p/columns_per_cluster),(p%columns_per_cluster),(cid*lines_per_cluster+l)) = sum/hnorm; |
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| 238 | TD(cid,l,p) = TA(cid,l,p) - sum/hnorm; |
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| 239 | } |
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| 240 | // third domain : from (NP-hrange) to (NP-1) |
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| 241 | for ( p = NP-hrange ; p < NP ; p++) |
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| 242 | { |
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| 243 | sum = sum + TA(cid,l,NP-1) - TA(cid,l,p-hrange-1); |
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| 244 | TB((p/columns_per_cluster),(p%columns_per_cluster),(cid*lines_per_cluster+l)) = sum/hnorm; |
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| 245 | TD(cid,l,p) = TA(cid,l,p) - sum/hnorm; |
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| 246 | } |
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| 247 | |
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| 248 | PRINTF(" - line %d computed at cycle %d\n", l, proctime()); |
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| 249 | } |
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| 250 | |
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| 251 | delta = proctime() - date; |
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| 252 | date = date + delta; |
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| 253 | PRINTF(" *** completing horizontal filter at cycle %d (%d)\n", date, delta); |
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| 254 | |
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| 255 | barrier_wait(1); |
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| 256 | |
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| 257 | ////////////////////////////////////////////////////////// |
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| 258 | // parallel vertical filter : |
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| 259 | // C <= transpose(FV(B)) |
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| 260 | // each processor computes (NP/ntasks) columns |
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| 261 | |
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| 262 | delta = proctime() - date; |
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| 263 | date = date + delta; |
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| 264 | PRINTF("\n *** starting vertical filter at cycle %d (%d)\n", date, delta); |
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| 265 | |
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| 266 | // l = line index / p = column index in the cluster |
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| 267 | for ( p = columns_per_task*lid ; p < columns_per_task*(lid+1) ; p++) |
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| 268 | { |
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| 269 | unsigned int sum = 0; |
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| 270 | |
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| 271 | // The image must be extended : |
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| 272 | // if (l<0) TB(cid,p,x) == TB(cid,p,0) |
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| 273 | // if (l>NL-1) TB(cid,p,x) == TB(cid,p,NL-1) |
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| 274 | // We use the spécific values of the vertical ep-filter |
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| 275 | // To minimize the number of tests, the NL lines are split in three domains |
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| 276 | |
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| 277 | // first domain |
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| 278 | for ( l = 0 ; l < vrange ; l++) |
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| 279 | { |
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| 280 | for ( x = 0 ; x < (2*vrange+1) ; x++ ) |
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| 281 | { |
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| 282 | sum = sum + vf[x] * TB(cid,p,max(l-vrange+x,0)); |
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| 283 | } |
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| 284 | TC((l/lines_per_cluster),(l%lines_per_cluster),(cid*columns_per_cluster+p)) = sum/vnorm; |
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| 285 | } |
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| 286 | // second domain |
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| 287 | for ( l = vrange ; l < NL-vrange ; l++ ) |
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| 288 | { |
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| 289 | sum = sum + TB(cid,p,l+4) |
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| 290 | + TB(cid,p,l+8) |
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| 291 | + TB(cid,p,l+11) |
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| 292 | + TB(cid,p,l+15) |
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| 293 | + TB(cid,p,l+17) |
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| 294 | - TB(cid,p,l-5) |
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| 295 | - TB(cid,p,l-9) |
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| 296 | - TB(cid,p,l-12) |
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| 297 | - TB(cid,p,l-16) |
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| 298 | - TB(cid,p,max(l-18,0)); |
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| 299 | TC((l/lines_per_cluster),(l%lines_per_cluster),(cid*columns_per_cluster+p)) = sum/vnorm; |
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| 300 | } |
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| 301 | // third domain |
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| 302 | for ( l = NL-vrange ; l < NL ; l++ ) |
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| 303 | { |
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| 304 | sum = sum + TB(cid,p,min(l+5,NL-1)) |
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| 305 | + TB(cid,p,min(l+9,NL-1)) |
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| 306 | + TB(cid,p,min(l+12,NL-1)) |
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| 307 | + TB(cid,p,min(l+16,NL-1)) |
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| 308 | + TB(cid,p,min(l+18,NL-1)) |
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| 309 | - TB(cid,p,l-4) |
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| 310 | - TB(cid,p,l-8) |
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| 311 | - TB(cid,p,l-11) |
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| 312 | - TB(cid,p,l-15) |
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| 313 | - TB(cid,p,l-17); |
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| 314 | TC((l/lines_per_cluster),(l%lines_per_cluster),(cid*columns_per_cluster+p)) = sum/vnorm; |
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| 315 | } |
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| 316 | |
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| 317 | PRINTF(" - column %d computed at cycle %d\n", p, proctime()); |
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| 318 | } |
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| 319 | |
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| 320 | delta = proctime() - date; |
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| 321 | date = date + delta; |
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| 322 | PRINTF(" *** completing vertical filter at cycle %d (%d)\n", date, delta); |
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| 323 | |
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| 324 | barrier_wait(2); |
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| 325 | |
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| 326 | //////////////////////////////////////////////////////////////////////////// |
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| 327 | // final computation and parallel display using the distributed DMA |
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| 328 | // D <= D + C |
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| 329 | // Each processor use its private DMA channel to display |
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| 330 | // the resulting image, line per line (one byte per pixel). |
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| 331 | // Eah processor computes & displays (NL/ntasks) lines. |
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| 332 | |
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| 333 | delta = proctime() - date; |
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| 334 | date = date + delta; |
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| 335 | PRINTF("\n *** final computation and display at cycle %d (%d)\n", date, delta); |
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| 336 | |
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| 337 | for ( l = 0 ; l < lines_per_task ; l++) |
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| 338 | { |
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| 339 | for ( p = 0 ; p < NP ; p++) |
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| 340 | { |
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| 341 | TD(cid,l,p) = TD(cid,l,p) + TC(cid,l,p); |
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| 342 | line_buf[p] = (unsigned char)(TD(cid,l,p)); |
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| 343 | } |
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| 344 | int xxx = ( fb_write( NP*(cid*lines_per_cluster+lid*lines_per_task+l), line_buf, NP) ); |
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| 345 | if ( xxx ) |
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| 346 | { |
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| 347 | PRINTF("echec fb_write = %d\n", xxx); |
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| 348 | while(1); |
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| 349 | } |
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| 350 | if ( fb_completed() ) |
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| 351 | { |
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| 352 | PRINTF("echec fb_completed\n"); |
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| 353 | while(1); |
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| 354 | } |
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| 355 | PRINTF(" - line %d displayed at cycle %d\n", l, proctime()); |
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| 356 | } |
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| 357 | |
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| 358 | delta = proctime() - date; |
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| 359 | date = date + delta; |
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| 360 | PRINTF(" *** completing display at cycle %d (%d)\n", date, delta); |
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| 361 | |
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| 362 | while(1); |
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| 363 | |
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| 364 | } // end main() |
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| 365 | |
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