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RAS and RAS documentation now consistent.

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This commit is contained in:
Ross Thompson 2023-02-10 09:06:51 -06:00
parent faf7cd8c8a
commit 282ffd1313
1 changed files with 6 additions and 5 deletions
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11
src/ifu/bpred/RASPredictor.sv
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@ -42,7 +42,7 @@ module RASPredictor #(parameter int StackSize = 16 )(
logic CounterEn; logic CounterEn;
localparam Depth = $clog2(StackSize); localparam Depth = $clog2(StackSize);
logic [Depth-1:0] NextPtr, Ptr, PtrP1, PtrM1; logic [Depth-1:0] NextPtr, Ptr, P1, M1, IncDecPtr;
logic [StackSize-1:0] [`XLEN-1:0] memory; logic [StackSize-1:0] [`XLEN-1:0] memory;
integer index; integer index;
@ -71,10 +71,11 @@ module RASPredictor #(parameter int StackSize = 16 )(
assign CounterEn = PopF | PushE | RepairD; assign CounterEn = PopF | PushE | RepairD;
assign DecrementPtr = (PopF | DecRepairD) & ~IncrRepairD; assign DecrementPtr = (PopF | DecRepairD) & ~IncrRepairD;
mux2 #(Depth) PtrMux(PtrP1, PtrM1, DecrementPtr, NextPtr);
assign PtrM1 = Ptr - 1'b1; assign P1 = 1;
assign PtrP1 = Ptr + 1'b1; assign M1 = '1; // -1
mux2 #(Depth) PtrMux(P1, M1, DecrementPtr, IncDecPtr);
assign NextPtr = Ptr + IncDecPtr;
flopenr #(Depth) PTR(clk, reset, CounterEn, NextPtr, Ptr); flopenr #(Depth) PTR(clk, reset, CounterEn, NextPtr, Ptr);
@ -84,7 +85,7 @@ module RASPredictor #(parameter int StackSize = 16 )(
for(index=0; index<StackSize; index++) for(index=0; index<StackSize; index++)
memory[index] <= {`XLEN{1'b0}}; memory[index] <= {`XLEN{1'b0}};
end else if(PushE) begin end else if(PushE) begin
memory[PtrP1] <= #1 PCLinkE; memory[NextPtr] <= #1 PCLinkE;
end end
end end