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annotate modules/bluespec/Pygar/lab4/oSFIFO.bsv @ 13:6d461680c6d9 pygar svn.14

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[svn r14] more stuff
author punk
date Tue, 27 Apr 2010 09:03:28 -0400
parents 74716e9a81cc
children
rev   line source
rlm@8 1
rlm@8 2 import FIFO::*;
rlm@8 3 import ConfigReg::*;
rlm@8 4 import RWire::*;
rlm@8 5
rlm@8 6 import List::*;
rlm@8 7 import Monad::*;
rlm@8 8
rlm@8 9 interface SFIFO#(type alpha_T, type search_T);
rlm@8 10 method Action enq(alpha_T x);
rlm@8 11 method Action deq();
rlm@8 12 method alpha_T first();
rlm@8 13 method Action clear();
rlm@8 14 method Bool find(search_T x);
rlm@8 15 method Bool find2(search_T x);
rlm@8 16 method Bool notEmpty();
rlm@8 17 method Bool notFull();
rlm@8 18 endinterface
rlm@8 19
rlm@8 20 module mkSFIFO#(function Bool searchfunc(search_T s, alpha_T x)) (SFIFO#(alpha_T, search_T))
rlm@8 21 provisos
rlm@8 22 (Bits#(alpha_T,asz));
rlm@8 23
rlm@8 24 Reg#(alpha_T) f0 <- mkConfigRegU;
rlm@8 25 Reg#(alpha_T) f1 <- mkConfigRegU;
rlm@8 26
rlm@8 27 Reg#(Bool) vf0 <- mkConfigReg(False);
rlm@8 28 Reg#(Bool) vf1 <- mkConfigReg(False);
rlm@8 29
rlm@8 30 PulseWire edge1 <- mkPulseWire();
rlm@8 31
rlm@8 32 method Action enq(alpha_T x) if (!(vf0 && vf1));
rlm@8 33 if (edge1 || !vf0)//empty or we're dequeueing
rlm@8 34 begin
rlm@8 35 vf0 <= True; //True
rlm@8 36 vf1 <= False;
rlm@8 37 f0 <= x;
rlm@8 38 end
rlm@8 39 else // !vf1
rlm@8 40 begin
rlm@8 41 vf1 <= True;
rlm@8 42 f1 <= x;
rlm@8 43 end
rlm@8 44 endmethod
rlm@8 45
rlm@8 46 method Action deq() if (vf0);
rlm@8 47 edge1.send();
rlm@8 48 vf0 <= vf1;
rlm@8 49 f0 <= f1;
rlm@8 50 vf1 <= False;
rlm@8 51 endmethod
rlm@8 52
rlm@8 53 method alpha_T first() if(vf0);
rlm@8 54 return (f0);
rlm@8 55 endmethod
rlm@8 56
rlm@8 57 method Action clear();
rlm@8 58 vf0 <= False;
rlm@8 59 vf1 <= False;
rlm@8 60 endmethod
rlm@8 61
rlm@8 62 method Bool find(search_T sv);
rlm@8 63 Bool nvf0 = edge1 ? False: vf0;
rlm@8 64 Bool nvf1 = vf1;
rlm@8 65
rlm@8 66 return (nvf0 && searchfunc(sv, f0) ||
rlm@8 67 nvf1 && searchfunc(sv, f1));
rlm@8 68 endmethod
rlm@8 69
rlm@8 70 method Bool find2(search_T sv);
rlm@8 71 Bool nvf0 = edge1 ? False: vf0;
rlm@8 72 Bool nvf1 = vf1;
rlm@8 73
rlm@8 74 return (nvf0 && searchfunc(sv, f0) ||
rlm@8 75 nvf1 && searchfunc(sv, f1));
rlm@8 76 endmethod
rlm@8 77
rlm@8 78 method notEmpty() = vf0._read;
rlm@8 79
rlm@8 80 method Bool notFull();
rlm@8 81 return !(vf0 && vf1);
rlm@8 82 endmethod
rlm@8 83
rlm@8 84 endmodule
rlm@8 85
rlm@8 86 module mkSFIFO1#(function Bool searchfunc(search_T s, alpha_T x)) (SFIFO#(alpha_T, search_T))
rlm@8 87 provisos
rlm@8 88 (Bits#(alpha_T,asz), Eq#(alpha_T));
rlm@8 89
rlm@8 90 Reg#(alpha_T) f0 <- mkConfigRegU;
rlm@8 91
rlm@8 92 Reg#(Bool) vf0 <- mkConfigReg(False);
rlm@8 93
rlm@8 94 PulseWire edge1 <- mkPulseWire();
rlm@8 95
rlm@8 96 method Action enq(alpha_T x) if (!vf0);
rlm@8 97 vf0 <= True; //True
rlm@8 98 f0 <= x;
rlm@8 99 endmethod
rlm@8 100
rlm@8 101 method Action deq() if (vf0);
rlm@8 102 edge1.send();
rlm@8 103 vf0 <= False;
rlm@8 104 endmethod
rlm@8 105
rlm@8 106 method alpha_T first() if(vf0);
rlm@8 107 return (f0);
rlm@8 108 endmethod
rlm@8 109
rlm@8 110 method Action clear();
rlm@8 111 vf0 <= False;
rlm@8 112 endmethod
rlm@8 113
rlm@8 114 method Bool find(search_T sv);
rlm@8 115 Bool nvf0 = edge1 ? False: vf0;
rlm@8 116
rlm@8 117 return (nvf0 && searchfunc(sv, f0));
rlm@8 118 endmethod
rlm@8 119
rlm@8 120 method Bool find2(search_T sv);
rlm@8 121 Bool nvf0 = edge1 ? False: vf0;
rlm@8 122 return (nvf0 && searchfunc(sv, f0));
rlm@8 123 endmethod
rlm@8 124
rlm@8 125 method notEmpty() = vf0._read;
rlm@8 126
rlm@8 127 method Bool notFull();
rlm@8 128 return !vf0;
rlm@8 129 endmethod
rlm@8 130
rlm@8 131 endmodule
rlm@8 132
rlm@8 133 module mkSizedSFIFOInternal#(Integer n,
rlm@8 134 function Bool searchfunc1(search_T s, alpha_T x),
rlm@8 135 function Bool searchfunc2(search_T s, alpha_T x)) (SFIFO#(alpha_T, search_T))
rlm@8 136
rlm@8 137 provisos ( Bits#(alpha_T,alpha_SZ) );
rlm@8 138
rlm@8 139 List#(Reg#(alpha_T)) registers <- replicateM(n, mkRegU);
rlm@8 140 List#(Reg#(Bool)) valids <- replicateM(n, mkReg(False));
rlm@8 141
rlm@8 142 function Nat getNextFree (List#(Reg#(Bool)) vs);
rlm@8 143
rlm@8 144 Nat res = fromInteger(n - 1);
rlm@8 145
rlm@8 146 for (Integer x = n - 1; x > -1; x = x - 1)
rlm@8 147 res = !vs[x]._read() ? fromInteger(x) : res;
rlm@8 148
rlm@8 149 return res;
rlm@8 150
rlm@8 151 endfunction
rlm@8 152
rlm@8 153 function Bool notFullHelper();
rlm@8 154
rlm@8 155 Bool full = True;
rlm@8 156
rlm@8 157 for (Integer x = 0; x < n; x = x + 1)
rlm@8 158 full = full && valids[x]._read();
rlm@8 159
rlm@8 160 return !full;
rlm@8 161
rlm@8 162 endfunction
rlm@8 163
rlm@8 164 method Action enq( alpha_T item ) if ( notFullHelper() );
rlm@8 165
rlm@8 166 Nat k = getNextFree(valids);
rlm@8 167 select(valids, k)._write(True);
rlm@8 168 select(registers, k)._write(item);
rlm@8 169
rlm@8 170 endmethod
rlm@8 171
rlm@8 172 method Action deq() if ( valids[0]._read() );
rlm@8 173
rlm@8 174 for (Integer x = 0; x < (n-1); x = x + 1)
rlm@8 175 begin
rlm@8 176
rlm@8 177 (registers[x]) <= registers[x + 1]._read();
rlm@8 178 (valids[x]) <= valids[x + 1]._read();
rlm@8 179
rlm@8 180 end
rlm@8 181 (valids[n-1]) <= False;
rlm@8 182 endmethod
rlm@8 183
rlm@8 184 method alpha_T first() if ( valids[0]._read() );
rlm@8 185 return registers[0]._read();
rlm@8 186 endmethod
rlm@8 187
rlm@8 188 method Bool find(search_T sv);
rlm@8 189 Bool res = False;
rlm@8 190
rlm@8 191 for (Integer x = 0; x < n; x = x + 1)
rlm@8 192 if ( valids[x]._read() && searchfunc1(sv, registers[x]._read()) )
rlm@8 193 res = True;
rlm@8 194
rlm@8 195 return res;
rlm@8 196
rlm@8 197 endmethod
rlm@8 198
rlm@8 199 method Bool find2(search_T sv);
rlm@8 200 Bool res = False;
rlm@8 201
rlm@8 202 for (Integer x = 0; x < n; x = x + 1)
rlm@8 203 if ( valids[x]._read() && searchfunc2(sv, registers[x]._read()) )
rlm@8 204 res = True;
rlm@8 205
rlm@8 206 return res;
rlm@8 207
rlm@8 208 endmethod
rlm@8 209
rlm@8 210 method Action clear();
rlm@8 211
rlm@8 212 for (Integer x = 0; x < n; x = x + 1)
rlm@8 213 (valids[x]) <= False;
rlm@8 214
rlm@8 215 endmethod
rlm@8 216
rlm@8 217 method Bool notEmpty();
rlm@8 218 return valids[0]._read();
rlm@8 219 endmethod
rlm@8 220
rlm@8 221 method Bool notFull();
rlm@8 222 return notFullHelper();
rlm@8 223 endmethod
rlm@8 224
rlm@8 225 endmodule
rlm@8 226
rlm@8 227 module mkSizedSFIFO#(Integer n, function Bool searchfunc(search_T s, alpha_T x)) (SFIFO#(alpha_T, search_T))
rlm@8 228 provisos
rlm@8 229 (Bits#(alpha_T,asz));
rlm@8 230
rlm@8 231 let foo <- mkSizedSFIFOInternal(n, searchfunc, searchfunc);
rlm@8 232 return foo;
rlm@8 233
rlm@8 234 endmodule