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Continued bmu cleanup

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David Harris 2024-05-22 00:48:04 -07:00
parent 88eb7bd045
commit a17204b0fe
2 changed files with 4 additions and 10 deletions
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12
src/ieu/bmu/byteop.sv
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@ -30,22 +30,16 @@
module byteop #(parameter WIDTH=32) ( module byteop #(parameter WIDTH=32) (
input logic [WIDTH-1:0] A, // Operands input logic [WIDTH-1:0] A, // Operands
input logic [1:0] ByteSelect, // LSB of Immediate input logic ByteSelect, // LSB of Immediate
output logic [WIDTH-1:0] ByteResult); // rev8, orcb result output logic [WIDTH-1:0] ByteResult); // rev8, orcb result
logic [WIDTH-1:0] OrcBResult, Rev8Result; logic [WIDTH-1:0] OrcBResult, Rev8Result;
genvar i; genvar i;
for (i=0;i<WIDTH;i+=8) begin:loop for (i=0;i<WIDTH;i+=8) begin:byteloop
assign OrcBResult[i+7:i] = {8{|A[i+7:i]}}; assign OrcBResult[i+7:i] = {8{|A[i+7:i]}};
assign Rev8Result[WIDTH-i-1:WIDTH-i-8] = A[i+7:i]; assign Rev8Result[WIDTH-i-1:WIDTH-i-8] = A[i+7:i];
end end
// ByteOp Result Mux mux2 #(WIDTH) byteresultmux(Rev8Result, OrcBResult, ByteSelect, ByteResult);
// mux3 #(WIDTH) byteresultmux(Rev8Result, Brev8Result, OrcBResult, ByteSelect, ByteResult);
always_comb begin
if (ByteSelect[0] == 1'b0) ByteResult = Rev8Result;
else /*if (ByteSelect[1] == 1'b0) */ ByteResult = OrcBResult;
end
endmodule endmodule

2
src/ieu/bmu/zbb.sv
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@ -45,7 +45,7 @@ module zbb #(parameter WIDTH=32) (
mux2 #(1) ltmux(LT, LTU, BUnsigned , lt); mux2 #(1) ltmux(LT, LTU, BUnsigned , lt);
cnt #(WIDTH) cnt(.A, .RevA, .B(B[1:0]), .W64, .CntResult); cnt #(WIDTH) cnt(.A, .RevA, .B(B[1:0]), .W64, .CntResult);
byteop #(WIDTH) bu(.A, .ByteSelect({B[10], B[0]}), .ByteResult); byteop #(WIDTH) bu(.A, .ByteSelect(B[0]), .ByteResult);
ext #(WIDTH) ext(.A, .ExtSelect({~B[2], {B[2] & B[0]}}), .ExtResult); ext #(WIDTH) ext(.A, .ExtSelect({~B[2], {B[2] & B[0]}}), .ExtResult);
// ZBBSelect[2] differentiates between min(u) vs max(u) instruction // ZBBSelect[2] differentiates between min(u) vs max(u) instruction