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Siginficant cleanup of subwordwritemisaligned.

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Rose Thompson 2024-02-22 14:17:15 -06:00
parent 45c30267a5
commit fbc18abaa0
1 changed files with 2 additions and 48 deletions
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src/lsu/subwordwritemisaligned.sv
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@ -72,53 +72,7 @@ module subwordwritemisaligned #(parameter LLEN) (
logic [LLEN*2-1:0] IMAFWriteData2M;
assign IMAFWriteData2M = {IMAFWriteDataM, IMAFWriteDataM};
localparam OffsetIndex = $clog2(LLEN/8);
logic [LLEN*2-1:0] LittleEndianWriteDataMTemp;
// *** RT: Switch to something like this.
assign LittleEndianWriteDataMTemp = (IMAFWriteData2M << PAdrSwap[OffsetIndex-1:0]) | (IMAFWriteData2M >> ~PAdrSwap[OffsetIndex-1:0]);
// Replicate data for subword writes
if (LLEN == 128) begin:sww
always_comb
case(PAdrSwap[3:0])
4'b0000: LittleEndianWriteDataM = {128'b0, IMAFWriteDataM };
4'b0001: LittleEndianWriteDataM = {120'b0, IMAFWriteDataM, 8'b0 };
4'b0010: LittleEndianWriteDataM = {112'b0, IMAFWriteDataM, 16'b0};
4'b0011: LittleEndianWriteDataM = {104'b0, IMAFWriteDataM, 24'b0};
4'b0100: LittleEndianWriteDataM = {96'b0, IMAFWriteDataM, 32'b0};
4'b0101: LittleEndianWriteDataM = {88'b0, IMAFWriteDataM, 40'b0};
4'b0110: LittleEndianWriteDataM = {80'b0, IMAFWriteDataM, 48'b0};
4'b0111: LittleEndianWriteDataM = {72'b0, IMAFWriteDataM, 56'b0};
4'b1000: LittleEndianWriteDataM = {64'b0, IMAFWriteDataM, 64'b0};
4'b1001: LittleEndianWriteDataM = {56'b0, IMAFWriteDataM, 72'b0 };
4'b1010: LittleEndianWriteDataM = {48'b0, IMAFWriteDataM, 80'b0};
4'b1011: LittleEndianWriteDataM = {40'b0, IMAFWriteDataM, 88'b0};
4'b1100: LittleEndianWriteDataM = {32'b0, IMAFWriteDataM, 96'b0};
4'b1101: LittleEndianWriteDataM = {24'b0, IMAFWriteDataM, 104'b0};
4'b1110: LittleEndianWriteDataM = {16'b0, IMAFWriteDataM, 112'b0};
4'b1111: LittleEndianWriteDataM = {8'b0, IMAFWriteDataM, 120'b0};
default: LittleEndianWriteDataM = IMAFWriteDataM; // sq
endcase
end else if (LLEN == 64) begin:sww
always_comb
case(PAdrSwap[2:0])
3'b000: LittleEndianWriteDataM = {IMAFWriteDataM, IMAFWriteDataM};
3'b001: LittleEndianWriteDataM = {IMAFWriteDataM[55:0], IMAFWriteDataM, IMAFWriteDataM[63:56]};
3'b010: LittleEndianWriteDataM = {IMAFWriteDataM[47:0], IMAFWriteDataM, IMAFWriteDataM[63:48]};
3'b011: LittleEndianWriteDataM = {IMAFWriteDataM[39:0], IMAFWriteDataM, IMAFWriteDataM[63:40]};
3'b100: LittleEndianWriteDataM = {IMAFWriteDataM[31:0], IMAFWriteDataM, IMAFWriteDataM[63:32]};
3'b101: LittleEndianWriteDataM = {IMAFWriteDataM[23:0], IMAFWriteDataM, IMAFWriteDataM[63:24]};
3'b110: LittleEndianWriteDataM = {IMAFWriteDataM[15:0], IMAFWriteDataM, IMAFWriteDataM[63:16]};
3'b111: LittleEndianWriteDataM = {IMAFWriteDataM[7:0], IMAFWriteDataM, IMAFWriteDataM[63:8] };
endcase
end else begin:sww // 32-bit
always_comb
case(PAdrSwap[1:0])
2'b00: LittleEndianWriteDataM = {32'b0, IMAFWriteDataM };
2'b01: LittleEndianWriteDataM = {24'b0, IMAFWriteDataM, 8'b0 };
2'b10: LittleEndianWriteDataM = {16'b0, IMAFWriteDataM, 16'b0};
2'b11: LittleEndianWriteDataM = {8'b0, IMAFWriteDataM, 24'b0};
default: LittleEndianWriteDataM = IMAFWriteDataM; // shouldn't happen
endcase
end
assign LittleEndianWriteDataM = (IMAFWriteData2M << (PAdrSwap[OffsetIndex-1:0] * 8)) | (IMAFWriteData2M >> (LLEN - (PAdrSwap[OffsetIndex-1:0] * 8)));
endmodule