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Cleaned up otfc4

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David Harris 2022-09-19 00:58:20 -07:00
parent 309995a6e9
commit d6f1453275
1 changed files with 13 additions and 8 deletions
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21
pipelined/src/fpu/otfc.sv
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@ -75,22 +75,27 @@ module sotfc4(
// bits to the quotient as they come. // bits to the quotient as they come.
// Use this otfc for division and square root. // Use this otfc for division and square root.
logic [`DIVb:0] K1, K2, K3;
assign K1 = (C&~(C << 1)); // K
assign K2 = ((C << 1)&~(C << 2)); // 2K
assign K3 = (C & ~(C << 2)); // 3K
always_comb begin always_comb begin
if (s[3]) begin if (s[3]) begin
SNext = S | ((C << 1)&~(C << 2)); SNext = S | K2;
SMNext = S | (C&~(C << 1)); SMNext = S | K1;
end else if (s[2]) begin end else if (s[2]) begin
SNext = S | (C&~(C << 1)); SNext = S | K1;
SMNext = S; SMNext = S;
end else if (s[1]) begin end else if (s[1]) begin
SNext = SM | (C&~(C << 2)); SNext = SM | K3;
SMNext = SM | ((C << 1)&~(C << 2)); SMNext = SM | K2;
end else if (s[0]) begin end else if (s[0]) begin
SNext = SM | ((C << 1)&~(C << 2)); SNext = SM | K2;
SMNext = SM | (C&~(C << 1)); SMNext = SM | K1;
end else begin // If sp and sn are not true, then sz is end else begin // If sp and sn are not true, then sz is
SNext = S; SNext = S;
SMNext = SM | (C & ~(C << 2)); SMNext = SM | K3;
end end
end end