SSR - 2024.1 English

Vitis Libraries

Release Date
2024-05-30
Version
2024.1 English

When using the TP_SSR parameter, this will determine the number of parallel cascaded (if TP_CASC_LEN > 1) paths that the Matrix-Multiplication output will be split into. The data of Matrix A will be split by TP_SSR along the TP_DIM_A dimension but there will be no additional splitting (other than the necessary cascade splitting) for Matrix B. Each SSR path will produce a split of the output matrix with a size of (TP_DIM_A / TP_SSR) * TP_DIM_B. Depending on the set value of TP_DIM_OUT_LEADING, the output for each SSR path will be row major or column major (TP_DIM_OUT_LEADING set to 0 or 1 respectively). For row major the output for each SSR can be concatenated together, and for column major the output for each SSR should be interleaved with a step of (TP_DIM_A / TP_SSR).

Table 59 Input Matrix A (16x16 - 4x4 Tile - Cascade Length 2 and SSR 4)
    Cascade 0 Cascade 1
    Tile Col 0 Tile Col 1 Tile Col 2 Tile Col 3
SSR 0 Tile Row 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
SSR 1 Tile Row 1 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
SSR 2 Tile Row 2 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191
SSR 3 Tile Row 3 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
Table 60 Input Matrix B (16x16 - 4x2 Tile - Cascade Length 2 and SSR 4)
    SSR 0, 1, 2, and 3 (Each Sub Matrix for a particular cascade position should go to all SSR paths)
    Tile Col 0 Tile Col 1 Tile Col 2 Tile Col 3 Tile Col 4 Tile Col 5 Tile Col 6 Tile Col 7
Cascade 0 Tile Row 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
Tile Row 1 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
Cascade 1 Tile Row 2 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191
Tile Row 3 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
Table 61 Output Matrix (16x16 - 4x2 Tile - Cascade Length 2 and SSR 4)
    Tile Col 0 Tile Col 1 Tile Col 2 Tile Col 3 Tile Col 4 Tile Col 5 Tile Col 6 Tile Col 7
SSR 0 Tile Row 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
Tile Row 1 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
SSR 1 Tile Row 2 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191
Tile Row 3 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255

You can find a full list of the descriptions and parameters in the API Reference Overview.

Connections to the cascade ports can be made as follows:

for (int i = 0; i < TP_SSR; i++)
   for (int j = 0 ; j < P_CASC_LEN; j++) {
      connect<>(inA[(i*TP_CASC_LEN) + j], mmultGraph.inA[(i*TP_CASC_LEN) + j]);
      connect<>(inB[(i*TP_CASC_LEN) + j], mmultGraph.inB[(i*TP_CASC_LEN) + j]);
   }
   connect<>(mmultGraph.out[i], out[i]);
}