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Rewrote convert shift calculation with always for ease of reading

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This commit is contained in:
David Harris 2022-07-17 16:40:58 +00:00
parent 7f8ee1e5f4
commit 7c744f0053
1 changed files with 5 additions and 4 deletions
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7
pipelined/src/fpu/cvtshiftcalc.sv
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@ -60,10 +60,11 @@ module cvtshiftcalc(
// - otherwise: // - otherwise:
// | LzcInM | 0's if nessisary | // | LzcInM | 0's if nessisary |
// change to int shift to the left one // change to int shift to the left one
assign CvtShiftIn = ToInt ? {{`XLEN{1'b0}}, Xm[`NF]&~CvtCe[`NE], Xm[`NF-1]|(CvtCe[`NE]&Xm[`NF]), Xm[`NF-2:0], {`CVTLEN-`XLEN{1'b0}}} :
CvtResDenormUf ? {{`NF-1{1'b0}}, Xm, {`CVTLEN-`NF+1{1'b0}}} :
{CvtLzcIn, {`NF+1{1'b0}}};
always_comb
if (ToInt) CvtShiftIn = {{`XLEN{1'b0}}, Xm[`NF]&~CvtCe[`NE], Xm[`NF-1]|(CvtCe[`NE]&Xm[`NF]), Xm[`NF-2:0], {`CVTLEN-`XLEN{1'b0}}};
else if (CvtResDenormUf) CvtShiftIn = {{`NF-1{1'b0}}, Xm, {`CVTLEN-`NF+1{1'b0}}};
else CvtShiftIn = {CvtLzcIn, {`NF+1{1'b0}}};
// choose the negative of the fraction size // choose the negative of the fraction size
if (`FPSIZES == 1) begin if (`FPSIZES == 1) begin