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Simplified muxing for AES64

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This commit is contained in:
David Harris 2024-03-11 00:14:38 -07:00
parent d22306ab9f
commit 7ee3145fc1
4 changed files with 17 additions and 17 deletions
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4
src/ieu/bmu/bitmanipalu.sv
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@ -114,13 +114,13 @@ module bitmanipalu import cvw::*; #(parameter cvw_t P) (
// ZKND Unit
if (P.ZKND_SUPPORTED) begin: zknd
if (P.XLEN == 32) aes32d aes32d(.bs(Funct7[6:5]), .rs1(ABMU), .rs2(BBMU), .finalround(~ZBBSelect[0]), .result(ZKNDResult));
if (P.XLEN == 32) aes32d aes32d(.bs(Funct7[6:5]), .rs1(ABMU), .rs2(BBMU), .finalround(ZBBSelect[2]), .result(ZKNDResult));
else zknd64 #(P.XLEN) ZKND64(.A(ABMU), .B(BBMU), .Funct7, .RNUM(Rs2E[3:0]), .ZKNDSelect(ZBBSelect[2:0]), .ZKNDResult);
end else assign ZKNDResult = 0;
// ZKNE Unit
if (P.ZKNE_SUPPORTED) begin: zkne
if (P.XLEN == 32) aes32e aes32e(.bs(Funct7[6:5]), .rs1(ABMU), .rs2(BBMU), .finalround(~ZBBSelect[0]), .result(ZKNEResult));
if (P.XLEN == 32) aes32e aes32e(.bs(Funct7[6:5]), .rs1(ABMU), .rs2(BBMU), .finalround(ZBBSelect[2]), .result(ZKNEResult));
else zkne64 #(P.XLEN) ZKNE64(.A(ABMU), .B(BBMU), .Funct7, .RNUM(Rs2E[3:0]), .ZKNESelect(ZBBSelect[2:0]), .ZKNEResult);
end else assign ZKNEResult = 0;

22
src/ieu/bmu/bmuctrl.sv
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@ -215,36 +215,36 @@ module bmuctrl import cvw::*; #(parameter cvw_t P) (
if (P.ZKND_SUPPORTED) begin //ZKND
if (P.XLEN==32)
casez({OpD, Funct7D, Funct3D})
17'b0110011_??10101_000: BMUControlsD = `BMUCTRLW'b000_0111_0000_1_0_0_1_0_0_0_0_0; // aes32dsi - final round decrypt
17'b0110011_??10111_000: BMUControlsD = `BMUCTRLW'b000_0111_0001_1_0_0_1_0_0_0_0_0; // aes32dsmi - mid round decrypt
17'b0110011_??10101_000: BMUControlsD = `BMUCTRLW'b000_0111_0100_1_0_0_1_0_0_0_0_0; // aes32dsi - final round decrypt
17'b0110011_??10111_000: BMUControlsD = `BMUCTRLW'b000_0111_0000_1_0_0_1_0_0_0_0_0; // aes32dsmi - mid round decrypt
endcase
else if (P.XLEN==64)
casez({OpD, Funct7D, Funct3D})
17'b0110011_0011101_000: BMUControlsD = `BMUCTRLW'b000_0111_0000_1_0_0_1_0_0_0_0_0; // aes64ds - decrypt final round
17'b0110011_0011111_000: BMUControlsD = `BMUCTRLW'b000_0111_0001_1_0_0_1_0_0_0_0_0; // aes64dsm - decrypt mid round
17'b0110011_0011101_000: BMUControlsD = `BMUCTRLW'b000_0111_0100_1_0_0_1_0_0_0_0_0; // aes64ds - decrypt final round
17'b0110011_0011111_000: BMUControlsD = `BMUCTRLW'b000_0111_0000_1_0_0_1_0_0_0_0_0; // aes64dsm - decrypt mid round
17'b0010011_0011000_001: if (Rs2D == 5'b00000)
BMUControlsD = `BMUCTRLW'b000_0111_0010_1_1_0_1_0_0_0_0_0; // aes64im - decrypt keyschdule mixcolumns
BMUControlsD = `BMUCTRLW'b000_0111_0011_1_1_0_1_0_0_0_0_0; // aes64im - decrypt keyschdule mixcolumns
endcase
end
if (P.ZKNE_SUPPORTED) begin //ZKNE
if (P.XLEN==32)
casez({OpD, Funct7D, Funct3D})
17'b0110011_??10001_000: BMUControlsD = `BMUCTRLW'b000_1000_0000_1_0_0_1_0_0_0_0_0; // aes32esi - final round encrypt
17'b0110011_??10011_000: BMUControlsD = `BMUCTRLW'b000_1000_0001_1_0_0_1_0_0_0_0_0; // aes32esmi - mid round encrypt
17'b0110011_??10001_000: BMUControlsD = `BMUCTRLW'b000_1000_0100_1_0_0_1_0_0_0_0_0; // aes32esi - final round encrypt
17'b0110011_??10011_000: BMUControlsD = `BMUCTRLW'b000_1000_0000_1_0_0_1_0_0_0_0_0; // aes32esmi - mid round encrypt
endcase
else if (P.XLEN==64)
casez({OpD, Funct7D, Funct3D})
17'b0110011_0011001_000: BMUControlsD = `BMUCTRLW'b000_1000_0000_1_0_0_1_0_0_0_0_0; // aes64es - encrypt final round
17'b0110011_0011011_000: BMUControlsD = `BMUCTRLW'b000_1000_0001_1_0_0_1_0_0_0_0_0; // aes64esm - encrypt mid round
17'b0110011_0011001_000: BMUControlsD = `BMUCTRLW'b000_1000_0100_1_0_0_1_0_0_0_0_0; // aes64es - encrypt final round
17'b0110011_0011011_000: BMUControlsD = `BMUCTRLW'b000_1000_0000_1_0_0_1_0_0_0_0_0; // aes64esm - encrypt mid round
endcase
end
if ((P.ZKND_SUPPORTED | P.ZKNE_SUPPORTED) & P.XLEN == 64) begin // ZKND and ZKNE shared instructions
casez({OpD, Funct7D, Funct3D})
17'b0010011_0011000_001: if (Rs2D[4] == 1'b1)
BMUControlsD = `BMUCTRLW'b000_0111_0011_1_0_0_1_0_0_0_0_0; // aes64ks1i - key schedule istr1 ... Don't know why this works here only ... P.XLEN is not 64 bits?
17'b0110011_0111111_000: BMUControlsD = `BMUCTRLW'b000_0111_0100_1_0_0_1_0_0_0_0_0; // aes64ks2 - key schedule istr2
BMUControlsD = `BMUCTRLW'b000_0111_0001_1_0_0_1_0_0_0_0_0; // aes64ks1i - key schedule istr1 ... Don't know why this works here only ... P.XLEN is not 64 bits?
17'b0110011_0111111_000: BMUControlsD = `BMUCTRLW'b000_0111_0010_1_0_0_1_0_0_0_0_0; // aes64ks2 - key schedule istr2
endcase
end

4
src/ieu/kmu/zknd64.sv
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@ -37,10 +37,10 @@ module zknd64 #(parameter WIDTH=32) (
logic [63:0] aes64dRes, aes64imRes, aes64ks1iRes, aes64ks2Res;
// RV64
aes64d aes64d(.rs1(A), .rs2(B), .finalround(~ZKNDSelect[0]), .result(aes64dRes)); // decode AES
aes64d aes64d(.rs1(A), .rs2(B), .finalround(ZKNDSelect[2]), .result(aes64dRes)); // decode AES
aes64im aes64im(.rs1(A), .DataOut(aes64imRes));
aes64ks1i aes64ks1i(.roundnum(RNUM), .rs1(A), .rd(aes64ks1iRes));
aes64ks2 aes64ks2(.rs2(B), .rs1(A), .rd(aes64ks2Res));
mux5 #(WIDTH) zkndmux(aes64dRes, aes64dRes, aes64imRes, aes64ks1iRes, aes64ks2Res, ZKNDSelect, ZKNDResult);
mux4 #(WIDTH) zkndmux(aes64dRes, aes64ks1iRes, aes64ks2Res, aes64imRes, ZKNDSelect[1:0], ZKNDResult);
endmodule

4
src/ieu/kmu/zkne64.sv
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@ -37,10 +37,10 @@ module zkne64 #(parameter WIDTH=32) (
logic [63:0] aes64eRes, aes64ks1iRes, aes64ks2Res;
// RV64
aes64e aes64e(.rs1(A), .rs2(B), .finalround(~ZKNESelect[0]), .result(aes64eRes));
aes64e aes64e(.rs1(A), .rs2(B), .finalround(ZKNESelect[2]), .result(aes64eRes));
aes64ks1i aes64ks1i(.roundnum(RNUM), .rs1(A), .rd(aes64ks1iRes));
aes64ks2 aes64ks2(.rs2(B), .rs1(A), .rd(aes64ks2Res));
// 010 is a placeholder to match the select of ZKND's AES64KS1I since they share some instruction
mux5 #(WIDTH) zknemux(aes64eRes, aes64eRes, 64'b0, aes64ks1iRes, aes64ks2Res, ZKNESelect, ZKNEResult);
mux3 #(WIDTH) zknemux(aes64eRes, aes64ks1iRes, aes64ks2Res, ZKNESelect[1:0], ZKNEResult);
endmodule