1library IEEE; 2use IEEE.std_logic_1164.all; 3 4entity sqrt32 is 5 port ( P : in std_logic_vector(31 downto 0); 6 U : out std_logic_vector(15 downto 0)); 7end sqrt32; 8 9architecture circuits of sqrt32 is 10 11component S0 12 port ( x : in std_logic; 13 u : in std_logic; 14 d : out std_logic; 15 bo : out std_logic); 16end component; 17component S0b 18 port ( x : in std_logic; 19 bo : out std_logic); 20end component; 21component S1 -- subtractor multiplexor 22 port ( x : in std_logic; 23 b : in std_logic; 24 u : in std_logic; 25 d : out std_logic; 26 bo : out std_logic); 27end component; 28component S1b 29 port ( x : in std_logic; 30 b : in std_logic; 31 bo : out std_logic); 32end component; 33component Sb 34 port ( x : in std_logic; 35 y : in std_logic; 36 b : in std_logic; 37 bo : out std_logic); 38end component; 39component Sm -- subtractor multiplexor 40 port ( x : in std_logic; 41 y : in std_logic; 42 b : in std_logic; 43 u : in std_logic; 44 d : out std_logic; 45 bo : out std_logic); 46end component; 47component Sn -- subtractor multiplexor 48 port ( x : in std_logic; 49 b : in std_logic; 50 bo : out std_logic); 51end component; 52 signal b0000, b0001, b0002, b0003, b0004, b0005, b0006, b0007, b0008, 53 b0009, b0010, b0011, b0012, b0013, b0014, b0015, b0016, 54 b0017 : std_logic; 55 signal x0102, x0103, x0104, x0105, x0106, x0107, x0108, x0109, x0110, 56 x0111, x0112, x0113, x0114, x0115, x0116, x0117 : std_logic; 57 signal b0102, b0103, b0104, b0105, b0106, b0107, b0108, b0109, b0110, 58 b0111, b0112, b0113, b0114, b0115, b0116, b0117, b0118 : std_logic; 59 signal x0204, x0205, x0206, x0207, x0208, x0209, x0210, x0211, x0212, 60 x0213, x0214, x0215, x0216, x0217, x0218 : std_logic; 61 signal b0204, b0205, b0206, b0207, b0208, b0209, b0210, b0211, b0212, 62 b0213, b0214, b0215, b0216, b0217, b0218, b0219 : std_logic; 63 signal x0306, x0307, x0308, x0309, x0310, x0311, x0312, x0313, x0314, 64 x0315, x0316, x0317, x0318, x0319 : std_logic; 65 signal b0306, b0307, b0308, b0309, b0310, b0311, b0312, b0313, b0314, 66 b0315, b0316, b0317, b0318, b0319, b0320 : std_logic; 67 signal x0408, x0409, x0410, x0411, x0412, x0413, x0414, x0415, x0416, 68 x0417, x0418, x0419, x0420 : std_logic; 69 signal b0408, b0409, b0410, b0411, b0412, b0413, b0414, b0415, b0416, 70 b0417, b0418, b0419, b0420, b0421 : std_logic; 71 signal x0510, x0511, x0512, x0513, x0514, x0515, x0516, x0517, x0518, 72 x0519, x0520, x0521 : std_logic; 73 signal b0510, b0511, b0512, b0513, b0514, b0515, b0516, b0517, b0518, 74 b0519, b0520, b0521, b0522 : std_logic; 75 signal x0612, x0613, x0614, x0615, x0616, x0617, x0618, x0619, x0620, 76 x0621, x0622 : std_logic; 77 signal b0612, b0613, b0614, b0615, b0616, b0617, b0618, b0619, b0620, 78 b0621, b0622, b0623 : std_logic; 79 signal x0714, x0715, x0716, x0717, x0718, x0719, x0720, x0721, x0722, 80 x0723 : std_logic; 81 signal b0714, b0715, b0716, b0717, b0718, b0719, b0720, b0721, b0722, 82 b0723, b0724 : std_logic; 83 signal x0816, x0817, x0818, x0819, x0820, x0821, x0822, x0823, 84 x0824 : std_logic; 85 signal b0816, b0817, b0818, b0819, b0820, b0821, b0822, b0823, 86 b0824, b0825 : std_logic; 87 signal x0918, x0919, x0920, x0921, x0922, x0923, x0924, x0925 : std_logic; 88 signal b0918, b0919, b0920, b0921, b0922, b0923, b0924, b0925, 89 b0926 : std_logic; 90 signal x1020, x1021, x1022, x1023, x1024, x1025, x1026 : std_logic; 91 signal b1020, b1021, b1022, b1023, b1024, b1025, b1026, b1027 : std_logic; 92 signal x1122, x1123, x1124, x1125, x1126, x1127 : std_logic; 93 signal b1122, b1123, b1124, b1125, b1126, b1127, b1128 : std_logic; 94 signal x1224, x1225, x1226, x1227, x1228 : std_logic; 95 signal b1224, b1225, b1226, b1227, b1228, b1229 : std_logic; 96 signal x1326, x1327, x1328, x1329 : std_logic; 97 signal b1326, b1327, b1328, b1329, b1330 : std_logic; 98 signal x1428, x1429, x1430 : std_logic; 99 signal b1428, b1429, b1430, b1431 : std_logic; 100 signal x1530, x1531 : std_logic; 101 signal b1530, b1531, bxx : std_logic; 102begin -- circuits of sqrt32 103 -- x y b u d bo 104 s1530: S0 port map(P(30), b1531, x1530, b1530); 105 s1531: S1 port map(P(31), b1530, b1531, x1531, bxx ); 106 b1531 <= not bxx; 107 108 s1428: S0 port map(P(28), b1431, x1428, b1428); 109 s1429: S1 port map(P(29), b1428, b1431, x1429, b1429); 110 s1430: Sm port map(x1530, b1531, b1429, b1431, x1430, b1430); 111 s1431: Sn port map(x1531, b1430, b1431); 112 113 s1326: S0 port map(P(26), b1330, x1326, b1326); 114 s1327: S1 port map(P(27), b1326, b1330, x1327, b1327); 115 s1328: Sm port map(x1428, b1431, b1327, b1330, x1328, b1328); 116 s1329: Sm port map(x1429, b1531, b1328, b1330, x1329, b1329); 117 s1330: Sn port map(x1430, b1329, b1330); 118 119 s1224: S0 port map(P(24), b1229, x1224, b1224); 120 s1225: S1 port map(P(25), b1224, b1229, x1225, b1225); 121 s1226: Sm port map(x1326, b1330, b1225, b1229, x1226, b1226); 122 s1227: Sm port map(x1327, b1431, b1226, b1229, x1227, b1227); 123 s1228: Sm port map(x1328, b1531, b1227, b1229, x1228, b1228); 124 s1229: Sn port map(x1329, b1228, b1229); 125 126 s1122: S0 port map(P(22), b1128, x1122, b1122); 127 s1123: S1 port map(P(23), b1122, b1128, x1123, b1123); 128 s1124: Sm port map(x1224, b1229, b1123, b1128, x1124, b1124); 129 s1125: Sm port map(x1225, b1330, b1124, b1128, x1125, b1125); 130 s1126: Sm port map(x1226, b1431, b1125, b1128, x1126, b1126); 131 s1127: Sm port map(x1227, b1531, b1126, b1128, x1127, b1127); 132 s1128: Sn port map(x1228, b1127, b1128); 133 134 s1020: S0 port map(P(20), b1027, x1020, b1020); 135 s1021: S1 port map(P(21), b1020, b1027, x1021, b1021); 136 s1022: Sm port map(x1122, b1128, b1021, b1027, x1022, b1022); 137 s1023: Sm port map(x1123, b1229, b1022, b1027, x1023, b1023); 138 s1024: Sm port map(x1124, b1330, b1023, b1027, x1024, b1024); 139 s1025: Sm port map(x1125, b1431, b1024, b1027, x1025, b1025); 140 s1026: Sm port map(x1126, b1531, b1025, b1027, x1026, b1026); 141 s1027: Sn port map(x1127, b1026, b1027); 142 143 s0918: S0 port map(P(18), b0926, x0918, b0918); 144 s0919: S1 port map(P(19), b0918, b0926, x0919, b0919); 145 s0920: Sm port map(x1020, b1027, b0919, b0926, x0920, b0920); 146 s0921: Sm port map(x1021, b1128, b0920, b0926, x0921, b0921); 147 s0922: Sm port map(x1022, b1229, b0921, b0926, x0922, b0922); 148 s0923: Sm port map(x1023, b1330, b0922, b0926, x0923, b0923); 149 s0924: Sm port map(x1024, b1431, b0923, b0926, x0924, b0924); 150 s0925: Sm port map(x1025, b1531, b0924, b0926, x0925, b0925); 151 s0926: Sn port map(x1026, b0925, b0926); 152 153 s0816: S0 port map(P(16), b0825, x0816, b0816); 154 s0817: S1 port map(P(17), b0816, b0825, x0817, b0817); 155 s0818: Sm port map(x0918, b0926, b0817, b0825, x0818, b0818); 156 s0819: Sm port map(x0919, b1027, b0818, b0825, x0819, b0819); 157 s0820: Sm port map(x0920, b1128, b0819, b0825, x0820, b0820); 158 s0821: Sm port map(x0921, b1229, b0820, b0825, x0821, b0821); 159 s0822: Sm port map(x0922, b1330, b0821, b0825, x0822, b0822); 160 s0823: Sm port map(x0923, b1431, b0822, b0825, x0823, b0823); 161 s0824: Sm port map(x0924, b1531, b0823, b0825, x0824, b0824); 162 s0825: Sn port map(x0925, b0824, b0825); 163 164 s0714: S0 port map(P(14), b0724, x0714, b0714); 165 s0715: S1 port map(P(15), b0714, b0724, x0715, b0715); 166 s0716: Sm port map(x0816, b0825, b0715, b0724, x0716, b0716); 167 s0717: Sm port map(x0817, b0926, b0716, b0724, x0717, b0717); 168 s0718: Sm port map(x0818, b1027, b0717, b0724, x0718, b0718); 169 s0719: Sm port map(x0819, b1128, b0718, b0724, x0719, b0719); 170 s0720: Sm port map(x0820, b1229, b0719, b0724, x0720, b0720); 171 s0721: Sm port map(x0821, b1330, b0720, b0724, x0721, b0721); 172 s0722: Sm port map(x0822, b1431, b0721, b0724, x0722, b0722); 173 s0723: Sm port map(x0823, b1531, b0722, b0724, x0723, b0723); 174 s0724: Sn port map(x0824, b0723, b0724); 175 176 s0612: S0 port map(P(12), b0623, x0612, b0612); 177 s0613: S1 port map(P(13), b0612, b0623, x0613, b0613); 178 s0614: Sm port map(x0714, b0724, b0613, b0623, x0614, b0614); 179 s0615: Sm port map(x0715, b0825, b0614, b0623, x0615, b0615); 180 s0616: Sm port map(x0716, b0926, b0615, b0623, x0616, b0616); 181 s0617: Sm port map(x0717, b1027, b0616, b0623, x0617, b0617); 182 s0618: Sm port map(x0718, b1128, b0617, b0623, x0618, b0618); 183 s0619: Sm port map(x0719, b1229, b0618, b0623, x0619, b0619); 184 s0620: Sm port map(x0720, b1330, b0619, b0623, x0620, b0620); 185 s0621: Sm port map(x0721, b1431, b0620, b0623, x0621, b0621); 186 s0622: Sm port map(x0722, b1531, b0621, b0623, x0622, b0622); 187 s0623: Sn port map(x0723, b0622, b0623); 188 189 s0510: S0 port map(P(10), b0522, x0510, b0510); 190 s0511: S1 port map(P(11), b0510, b0522, x0511, b0511); 191 s0512: Sm port map(x0612, b0622, b0511, b0522, x0512, b0512); 192 s0513: Sm port map(x0613, b0723, b0512, b0522, x0513, b0513); 193 s0514: Sm port map(x0614, b0825, b0513, b0522, x0514, b0514); 194 s0515: Sm port map(x0615, b0926, b0514, b0522, x0515, b0515); 195 s0516: Sm port map(x0616, b1027, b0515, b0522, x0516, b0516); 196 s0517: Sm port map(x0617, b1128, b0516, b0522, x0517, b0517); 197 s0518: Sm port map(x0618, b1229, b0517, b0522, x0518, b0518); 198 s0519: Sm port map(x0619, b1330, b0518, b0522, x0519, b0519); 199 s0520: Sm port map(x0620, b1431, b0519, b0522, x0520, b0520); 200 s0521: Sm port map(x0621, b1531, b0520, b0522, x0521, b0521); 201 s0522: Sn port map(x0622, b0521, b0522); 202 203 s0408: S0 port map(P(8), b0421, x0408, b0408); 204 s0409: S1 port map(P(9), b0408, b0421, x0409, b0409); 205 s0410: Sm port map(x0510, b0522, b0409, b0421, x0410, b0410); 206 s0411: Sm port map(x0511, b0623, b0410, b0421, x0411, b0411); 207 s0412: Sm port map(x0512, b0724, b0411, b0421, x0412, b0412); 208 s0413: Sm port map(x0513, b0825, b0412, b0421, x0413, b0413); 209 s0414: Sm port map(x0514, b0926, b0413, b0421, x0414, b0414); 210 s0415: Sm port map(x0515, b1027, b0414, b0421, x0415, b0415); 211 s0416: Sm port map(x0516, b1128, b0415, b0421, x0416, b0416); 212 s0417: Sm port map(x0517, b1229, b0416, b0421, x0417, b0417); 213 s0418: Sm port map(x0518, b1330, b0417, b0421, x0418, b0418); 214 s0419: Sm port map(x0519, b1431, b0418, b0421, x0419, b0419); 215 s0420: Sm port map(x0520, b1531, b0419, b0421, x0420, b0420); 216 s0421: Sn port map(x0521, b0420, b0421); 217 218 s0306: S0 port map(P(6), b0320, x0306, b0306); 219 s0307: S1 port map(P(7), b0306, b0320, x0307, b0307); 220 s0308: Sm port map(x0408, b0421, b0307, b0320, x0308, b0308); 221 s0309: Sm port map(x0409, b0522, b0308, b0320, x0309, b0309); 222 s0310: Sm port map(x0410, b0623, b0309, b0320, x0310, b0310); 223 s0311: Sm port map(x0411, b0724, b0310, b0320, x0311, b0311); 224 s0312: Sm port map(x0412, b0825, b0311, b0320, x0312, b0312); 225 s0313: Sm port map(x0413, b0926, b0312, b0320, x0313, b0313); 226 s0314: Sm port map(x0414, b1027, b0313, b0320, x0314, b0314); 227 s0315: Sm port map(x0415, b1128, b0314, b0320, x0315, b0315); 228 s0316: Sm port map(x0416, b1229, b0315, b0320, x0316, b0316); 229 s0317: Sm port map(x0417, b1330, b0316, b0320, x0317, b0317); 230 s0318: Sm port map(x0418, b1431, b0317, b0320, x0318, b0318); 231 s0319: Sm port map(x0419, b1531, b0318, b0320, x0319, b0319); 232 s0320: Sn port map(x0420, b0319, b0320); 233 234 s0204: S0 port map(P(4), b0219, x0204, b0204); 235 s0205: S1 port map(P(5), b0204, b0219, x0205, b0205); 236 s0206: Sm port map(x0306, b0320, b0205, b0219, x0206, b0206); 237 s0207: Sm port map(x0307, b0421, b0206, b0219, x0207, b0207); 238 s0208: Sm port map(x0308, b0522, b0207, b0219, x0208, b0208); 239 s0209: Sm port map(x0309, b0623, b0208, b0219, x0209, b0209); 240 s0210: Sm port map(x0310, b0724, b0209, b0219, x0210, b0210); 241 s0211: Sm port map(x0311, b0825, b0210, b0219, x0211, b0211); 242 s0212: Sm port map(x0312, b0926, b0211, b0219, x0212, b0212); 243 s0213: Sm port map(x0313, b1027, b0212, b0219, x0213, b0213); 244 s0214: Sm port map(x0314, b1128, b0213, b0219, x0214, b0214); 245 s0215: Sm port map(x0315, b1229, b0214, b0219, x0215, b0215); 246 s0216: Sm port map(x0316, b1330, b0215, b0219, x0216, b0216); 247 s0217: Sm port map(x0317, b1431, b0216, b0219, x0217, b0217); 248 s0218: Sm port map(x0318, b1531, b0217, b0219, x0218, b0218); 249 s0219: Sn port map(x0319, b0218, b0219); 250 251 s0102: S0 port map(P(2), b0118, x0102, b0102); 252 s0103: S1 port map(P(3), b0102, b0118, x0103, b0103); 253 s0104: Sm port map(x0204, b0219, b0103, b0118, x0104, b0104); 254 s0105: Sm port map(x0205, b0320, b0104, b0118, x0105, b0105); 255 s0106: Sm port map(x0206, b0421, b0105, b0118, x0106, b0106); 256 s0107: Sm port map(x0207, b0522, b0106, b0118, x0107, b0107); 257 s0108: Sm port map(x0208, b0623, b0107, b0118, x0108, b0108); 258 s0109: Sm port map(x0209, b0724, b0108, b0118, x0109, b0109); 259 s0110: Sm port map(x0210, b0825, b0109, b0118, x0110, b0110); 260 s0111: Sm port map(x0211, b0926, b0110, b0118, x0111, b0111); 261 s0112: Sm port map(x0212, b1027, b0111, b0118, x0112, b0112); 262 s0113: Sm port map(x0213, b1128, b0112, b0118, x0113, b0113); 263 s0114: Sm port map(x0214, b1229, b0113, b0118, x0114, b0114); 264 s0115: Sm port map(x0215, b1330, b0114, b0118, x0115, b0115); 265 s0116: Sm port map(x0216, b1431, b0115, b0118, x0116, b0116); 266 s0117: Sm port map(x0217, b1531, b0116, b0118, x0117, b0117); 267 s0118: Sn port map(x0218, b0117, b0118); 268 269 s0000: S0b port map(P(0), b0000); 270 s0001: S1b port map(P(1), b0000, b0001); 271 s0002: Sb port map(x0102, b0118, b0001, b0002); 272 s0003: Sb port map(x0103, b0219, b0002, b0003); 273 s0004: Sb port map(x0104, b0320, b0003, b0004); 274 s0005: Sb port map(x0105, b0421, b0004, b0005); 275 s0006: Sb port map(x0106, b0522, b0005, b0006); 276 s0007: Sb port map(x0107, b0623, b0006, b0007); 277 s0008: Sb port map(x0108, b0724, b0007, b0008); 278 s0009: Sb port map(x0109, b0825, b0008, b0009); 279 s0010: Sb port map(x0110, b0926, b0009, b0010); 280 s0011: Sb port map(x0111, b1027, b0010, b0011); 281 s0012: Sb port map(x0112, b1128, b0011, b0012); 282 s0013: Sb port map(x0113, b1229, b0012, b0013); 283 s0014: Sb port map(x0114, b1330, b0013, b0014); 284 s0015: Sb port map(x0115, b1431, b0014, b0015); 285 s0016: Sb port map(x0116, b1531, b0015, b0016); 286 s0017: Sn port map(x0117, b0016, b0017); 287 288 U(0) <= b0017; -- set output bits 289 U(1) <= b0118; 290 U(2) <= b0219; 291 U(3) <= b0320; 292 U(4) <= b0421; 293 U(5) <= b0522; 294 U(6) <= b0623; 295 U(7) <= b0724; 296 U(8) <= b0825; 297 U(9) <= b0926; 298 U(10) <= b1027; 299 U(11) <= b1128; 300 U(12) <= b1229; 301 U(13) <= b1330; 302 U(14) <= b1431; 303 U(15) <= b1531; 304 305end circuits; -- of sqrt32 306