diff --git a/src/ieu/shifter.sv b/src/ieu/shifter.sv index fef8ba22..d18b6a51 100644 --- a/src/ieu/shifter.sv +++ b/src/ieu/shifter.sv @@ -44,68 +44,37 @@ module shifter ( if (`ZBB_SUPPORTED) begin: rotfunnel32 //rv32 shifter with rotates always_comb // funnel mux case({Right, Rotate}) -<<<<<<< HEAD 2'b00: Z = {A[31:0], 31'b0}; 2'b01: Z = {A[31:0], A[31:1]}; 2'b10: Z = {{31{Sign}}, A[31:0]}; - 2'b11: Z = {A[30:0], A}; - endcase - assign TruncAmt = Amt; // shift amount - end else begin // rv64 with rotates -======= - 2'b00: z = {A[31:0], 31'b0}; - 2'b01: z = {A[31:0], A[31:1]}; - 2'b10: z = {{31{Sign}}, A[31:0]}; - 2'b11: z = {A[30:0], A[31:0]}; + 2'b11: Z = {A[30:0], A[31:0]}; endcase end else begin: norotfunnel32 //rv32 shifter without rotates always_comb // funnel mux - if (Right) z = {{31{Sign}}, A[31:0]}; - else z = {A[31:0], 31'b0}; + if (Right) Z = {{31{Sign}}, A[31:0]}; + else Z = {A[31:0], 31'b0}; end - assign amttrunc = Amt; // shift amount + assign TruncAmt = Amt; // shift amount end else begin // rv64 logic [`XLEN-1:0] A64; mux3 #(64) extendmux({{32{1'b0}}, A[31:0]}, {{32{A[31]}}, A[31:0]}, A, {~W64, SubArith}, A64); // bottom 32 bits are always A[31:0], so effectively a 32-bit upper mux if (`ZBB_SUPPORTED) begin: rotfunnel64 // rv64 shifter with rotates ->>>>>>> 46e08410112c38dc213a034105f96f6979e1680a // shifter rotate source select mux logic [`XLEN-1:0] RotA; // rotate source mux2 #(`XLEN) rotmux(A, {A[31:0], A[31:0]}, W64, RotA); // W64 rotatons always_comb // funnel mux case ({Right, Rotate}) -<<<<<<< HEAD - 2'b00: Z = {A[63:0],{63'b0}}; - 2'b01: Z = {RotA, RotA[63:1]}; - 2'b10: Z = {{63{Sign}}, A[63:0]}; - 2'b11: Z = {RotA[62:0], RotA}; - endcase - assign TruncAmt = W64 ? {1'b0, Amt[4:0]} : Amt; // 32- or 64-bit shift - end - end else begin: norotfunnel - if (`XLEN==32) begin:shifter // RV32 - always_comb // funnel mux - if (Right) Z = {{31{Sign}}, A[31:0]}; - else Z = {A[31:0], 31'b0}; - assign TruncAmt = Amt; // shift amount - end else begin:shifter // RV64 - always_comb // funnel mux - if (Right) Z = {{63{Sign}}, A[63:0]}; - else Z = {A[63:0], {63'b0}}; - assign TruncAmt = W64 ? {1'b0, Amt[4:0]} : Amt; // 32- or 64-bit shift -======= - 2'b00: z = {A64[63:0],{63'b0}}; - 2'b01: z = {RotA[63:0], RotA[63:1]}; - 2'b10: z = {{63{Sign}}, A64[63:0]}; - 2'b11: z = {RotA[62:0], RotA[63:0]}; + 2'b00: Z = {A64[63:0],{63'b0}}; + 2'b01: Z = {RotA[63:0], RotA[63:1]}; + 2'b10: Z = {{63{Sign}}, A64[63:0]}; + 2'b11: Z = {RotA[62:0], RotA[63:0]}; endcase end else begin: norotfunnel64 // rv64 shifter without rotates always_comb // funnel mux - if (Right) z = {{63{Sign}}, A64[63:0]}; - else z = {A64[63:0], {63'b0}}; ->>>>>>> 46e08410112c38dc213a034105f96f6979e1680a + if (Right) Z = {{63{Sign}}, A64[63:0]}; + else Z = {A64[63:0], {63'b0}}; end - assign amttrunc = W64 ? {1'b0, Amt[4:0]} : Amt; // 32- or 64-bit shift + assign TruncAmt = W64 ? {1'b0, Amt[4:0]} : Amt; // 32- or 64-bit shift end // Opposite offset for right shifts @@ -115,5 +84,3 @@ module shifter ( assign ZShift = Z >> Offset; assign Y = ZShift[`XLEN-1:0]; endmodule - -