diff --git a/src/fpu/postproc/divshiftcalc.sv b/src/fpu/postproc/divshiftcalc.sv index 8ac85b992..4f4ce8c50 100644 --- a/src/fpu/postproc/divshiftcalc.sv +++ b/src/fpu/postproc/divshiftcalc.sv @@ -31,8 +31,8 @@ module divshiftcalc import cvw::*; #(parameter cvw_t P) ( input logic [P.NE+1:0] DivQe, // divsqrt exponent output logic [P.LOGNORMSHIFTSZ-1:0] DivShiftAmt, // divsqrt shift amount output logic [P.NORMSHIFTSZ-1:0] DivShiftIn, // divsqrt shift input - output logic DivResSubnorm, // is the divsqrt result subnormal - output logic DivSubnormShiftPos // is the subnormal shift amount positive + output logic DivResSubnorm, // is the divsqrt result subnormal + output logic DivSubnormShiftPos // is the subnormal shift amount positive ); logic [P.LOGNORMSHIFTSZ-1:0] NormShift; // normalized result shift amount @@ -46,10 +46,10 @@ module divshiftcalc import cvw::*; #(parameter cvw_t P) ( // if the result is subnormal // 00000000x.xxxxxx... Exp = DivQe // .00000000xxxxxxx... >> NF+1 Exp = DivQe+NF+1 - // .00xxxxxxxxxxxxx... << DivQe+NF+1 Exp = +1 + // .00xxxxxxxxxxxxx... << DivQe+NF+1 Exp = +1 // .0000xxxxxxxxxxx... >> 1 Exp = 1 - // Left shift amount = DivQe+NF+1-1 - assign DivSubnormShift = (P.NE+2)'(P.NF)+DivQe; + // Left shift amount = DivQe+NF+1-1 + assign DivSubnormShift = (P.NE+2)'(P.NF)+DivQe; assign DivSubnormShiftPos = ~DivSubnormShift[P.NE+1]; // if the result is normalized @@ -65,7 +65,7 @@ module divshiftcalc import cvw::*; #(parameter cvw_t P) ( // if the shift amount is negitive then don't shift (keep sticky bit) // need to multiply the early termination shift by LOGR*DIVCOPIES = left shift of log2(LOGR*DIVCOPIES) assign DivSubnormShiftAmt = DivSubnormShiftPos ? DivSubnormShift[P.LOGNORMSHIFTSZ-1:0] : '0; - assign DivShiftAmt = DivResSubnorm ? DivSubnormShiftAmt : NormShift; + assign DivShiftAmt = DivResSubnorm ? DivSubnormShiftAmt : NormShift; // pre-shift the divider result for normalization assign DivShiftIn = {{P.NF{1'b0}}, DivQm, {P.NORMSHIFTSZ-P.DIVb-1-P.NF{1'b0}}};