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Added M suffix in atomic

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This commit is contained in:
David Harris 2023-04-24 12:19:56 -07:00
parent e73922d34d
commit ee6a3f49f0
2 changed files with 8 additions and 8 deletions
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8
src/lsu/amoalu.sv
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@ -34,7 +34,7 @@ module amoalu (
input logic [`XLEN-1:0] IHWriteDataM, // LSU's WriteData
input logic [6:0] LSUFunct7M, // ALU Operation
input logic [2:0] LSUFunct3M, // Memoy access width
output logic [`XLEN-1:0] AMOResult // ALU output
output logic [`XLEN-1:0] AMOResultM // ALU output
);
logic [`XLEN-1:0] a, b, y;
@ -60,17 +60,17 @@ module amoalu (
if (`XLEN == 32) begin:sext
assign a = ReadDataM;
assign b = IHWriteDataM;
assign AMOResult = y;
assign AMOResultM = y;
end else begin:sext // `XLEN = 64
always_comb
if (LSUFunct3M[1:0] == 2'b10) begin // sign-extend word-length operations
a = {{32{ReadDataM[31]}}, ReadDataM[31:0]};
b = {{32{IHWriteDataM[31]}}, IHWriteDataM[31:0]};
AMOResult = {{32{y[31]}}, y[31:0]};
AMOResultM = {{32{y[31]}}, y[31:0]};
end else begin
a = ReadDataM;
b = IHWriteDataM;
AMOResult = y;
AMOResultM = y;
end
end
endmodule

8
src/lsu/atomic.sv
View File

@ -38,7 +38,7 @@ module atomic (
input logic [`PA_BITS-1:0] PAdrM, // Physical memory address
input logic [6:0] LSUFunct7M, // AMO alu operation gated by HPTW
input logic [2:0] LSUFunct3M, // IEU or HPTW memory operation size
input logic [1:0] LSUAtomicM, // 10: AMO operation, select AMOResult as the writedata output, 01: LR/SC operation
input logic [1:0] LSUAtomicM, // 10: AMO operation, select AMOResultM as the writedata output, 01: LR/SC operation
input logic [1:0] PreLSURWM, // IEU or HPTW Read/Write signal
input logic IgnoreRequest, // On FlushM or TLB miss ignore memory operation
output logic [`XLEN-1:0] IMAWriteDataM, // IEU, HPTW, or AMO write data
@ -46,12 +46,12 @@ module atomic (
output logic [1:0] LSURWM // IEU or HPTW Read/Write signal gated by LR/SC
);
logic [`XLEN-1:0] AMOResult;
logic [`XLEN-1:0] AMOResultM;
logic MemReadM;
amoalu amoalu(.ReadDataM, .IHWriteDataM, .LSUFunct7M, .LSUFunct3M, .AMOResult);
amoalu amoalu(.ReadDataM, .IHWriteDataM, .LSUFunct7M, .LSUFunct3M, .AMOResultM);
mux2 #(`XLEN) wdmux(IHWriteDataM, AMOResult, LSUAtomicM[1], IMAWriteDataM);
mux2 #(`XLEN) wdmux(IHWriteDataM, AMOResultM, LSUAtomicM[1], IMAWriteDataM);
assign MemReadM = PreLSURWM[1] & ~IgnoreRequest;
lrsc lrsc(.clk, .reset, .StallW, .MemReadM, .PreLSURWM, .LSUAtomicM, .PAdrM, .SquashSCW, .LSURWM);