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restructured code for lint error related to CORRSHIFTSZ

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David Harris 2023-01-12 07:34:37 -08:00
parent 93233fbb45
commit e58879f2d0
1 changed files with 10 additions and 7 deletions
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17
pipelined/src/fpu/postproc/shiftcorrection.sv
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@ -44,11 +44,13 @@ module shiftcorrection(
output logic [`CORRSHIFTSZ-1:0] Mf, // the shifted sum before LZA correction
output logic [`NE+1:0] Qe // corrected exponent for divider
);
logic [3*`NF+3:0] CorrSumShifted; // the shifted sum after LZA correction
logic [`CORRSHIFTSZ-1:0] CorrQmShifted; // the shifted divsqrt result after one bit shift
logic ResSubnorm; // is the result Subnormal
logic LZAPlus1; // add one or two to the sum's exponent due to LZA correction
logic LeftShiftQm; // should the divsqrt result be shifted one to the left
logic [3*`NF+3:0] CorrSumShifted; // the shifted sum after LZA correction
logic [`CORRSHIFTSZ-1:0] CorrQm0, CorrQm1; // portions of Shifted to select for CorrQmShifted
logic [`CORRSHIFTSZ-1:0] CorrQmShifted; // the shifted divsqrt result after one bit shift
logic ResSubnorm; // is the result Subnormal
logic LZAPlus1; // add one or two to the sum's exponent due to LZA correction
logic LeftShiftQm; // should the divsqrt result be shifted one to the left
// LZA correction
assign LZAPlus1 = Shifted[`NORMSHIFTSZ-1];
@ -61,8 +63,9 @@ module shiftcorrection(
// correct the shifting of the divsqrt caused by producing a result in (2, .5] range
// condition: if the msb is 1 or the exponent was one, but the shifted quotent was < 1 (Subnorm)
assign LeftShiftQm = (LZAPlus1|(DivQe==1&~LZAPlus1));
mux2 #(`CORRSHIFTSZ) divcorrmux(Shifted[`NORMSHIFTSZ-3:`NORMSHIFTSZ-`CORRSHIFTSZ-2],
Shifted[`NORMSHIFTSZ-2:`NORMSHIFTSZ-`CORRSHIFTSZ-1], LeftShiftQm, CorrQmShifted);
assign CorrQm0 = Shifted[`NORMSHIFTSZ-3:`NORMSHIFTSZ-`CORRSHIFTSZ-2];
assign CorrQm1 = Shifted[`NORMSHIFTSZ-2:`NORMSHIFTSZ-`CORRSHIFTSZ-1];
mux2 #(`CORRSHIFTSZ) divcorrmux(CorrQm0, CorrQm1, LeftShiftQm, CorrQmShifted);
// if the result of the divider was calculated to be subnormal, then the result was correctly normalized, so select the top shifted bits
always_comb