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Simplified sha512_32

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David Harris 2024-05-23 05:39:50 -07:00
parent c160ced2d2
commit d9a1691c83
1 changed files with 22 additions and 43 deletions
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65
src/ieu/sha/sha512_32.sv
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@ -31,67 +31,46 @@ module sha512_32 (
output logic [31:0] result
);
logic [31:0] x[6][6];
logic [31:0] y[6];
logic [31:0] x[6][3];
logic [31:0] y[3];
// sha512{sig0h/sig0l/sig1h/sig1l/sum0r/sum1r} select shifted operands for 32-bit xor6
// sha512sig0h
assign x[0][0] = A >> 1;
assign x[0][1] = A >> 7;
assign x[0][2] = A >> 8;
assign x[0][3] = B << 31;
assign x[0][4] = B << 24;
assign x[0][5] = '0;
assign x[0][0] = {B[0], A[31:1]};
assign x[0][1] = {B[7:0], A[31:8]};
assign x[0][2] = {7'b0, A[31:7]};
// sha512sig0l
assign x[1][0] = A >> 1;
assign x[1][1] = A >> 7;
assign x[1][2] = A >> 8;
assign x[1][3] = B << 31;
assign x[1][4] = B << 25;
assign x[1][5] = B << 24;
assign x[1][0] = x[0][0];
assign x[1][1] = x[0][1];
assign x[1][2] = {B[6:0], A[31:7]};
// sha512sig1h
assign x[2][0] = A << 3;
assign x[2][1] = A >> 6;
assign x[2][2] = A >> 19;
assign x[2][3] = B >> 29;
assign x[2][4] = B << 13;
assign x[2][5] = '0;
assign x[2][0] = {A[28:0], B[31:29]};
assign x[2][1] = {B[18:0], A[31:19]};
assign x[2][2] = {6'b0, A[31:6]};
// sha512sig1l
assign x[3][0] = A << 3;
assign x[3][1] = A >> 6;
assign x[3][2] = A >> 19;
assign x[3][3] = B >> 29;
assign x[3][4] = B << 26;
assign x[3][5] = B << 13;
assign x[3][0] = x[2][0];
assign x[3][1] = x[2][1];
assign x[3][2] = {B[5:0], A[31:6]};
// sha512sum0r
assign x[4][0] = A << 25;
assign x[4][1] = A << 30;
assign x[4][2] = A >> 28;
assign x[4][3] = B >> 7;
assign x[4][4] = B >> 2;
assign x[4][5] = B << 4;
assign x[4][0] = {A[6:0], B[31:7]};
assign x[4][1] = {A[1:0], B[31:2]};
assign x[4][2] = {B[27:0], A[31:28]};
// sha512sum1r
assign x[5][0] = A << 23;
assign x[5][1] = A >> 14;
assign x[5][2] = A >> 18;
assign x[5][3] = B >> 9;
assign x[5][4] = B << 18;
assign x[5][5] = B << 14;
assign x[5][0] = {A[8:0], B[31:9]};
assign x[5][1] = {B[13:0], A[31:14]};
assign x[5][2] = {B[17:0], A[31:18]};
// 32-bit muxes to select inputs to xor6 for sha512
assign y[0] = x[ZKNHSelect[2:0]][0];
assign y[1] = x[ZKNHSelect[2:0]][1];
assign y[2] = x[ZKNHSelect[2:0]][2];
assign y[3] = x[ZKNHSelect[2:0]][3];
assign y[4] = x[ZKNHSelect[2:0]][4];
assign y[5] = x[ZKNHSelect[2:0]][5];
// sha512 32-bit xor6
assign result = y[0] ^ y[1] ^ y[2] ^ y[3] ^ y[4] ^ y[5];
assign result = y[0] ^ y[1] ^ y[2];
endmodule