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Fixed formatting

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Harshini Srinath 2023-07-30 17:46:23 -07:00 committed by GitHub
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commit 8c7ea5a47a
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1 changed files with 38 additions and 45 deletions
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src/fpu/postproc/flags.sv
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@ -27,50 +27,50 @@
//////////////////////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////////////////////
module flags import cvw::*; #(parameter cvw_t P) ( module flags import cvw::*; #(parameter cvw_t P) (
input logic Xs, // X sign input logic Xs, // X sign
input logic [P.FMTBITS-1:0] OutFmt, // output format input logic [P.FMTBITS-1:0] OutFmt, // output format
input logic InfIn, // is a Inf input being used input logic InfIn, // is a Inf input being used
input logic XInf, YInf, ZInf, // inputs are infinity input logic XInf, YInf, ZInf, // inputs are infinity
input logic NaNIn, // is a NaN input being used input logic NaNIn, // is a NaN input being used
input logic XSNaN, YSNaN, ZSNaN, // inputs are signaling NaNs input logic XSNaN, YSNaN, ZSNaN, // inputs are signaling NaNs
input logic XZero, YZero, // inputs are zero input logic XZero, YZero, // inputs are zero
input logic [P.NE+1:0] FullRe, // Re with bits to determine sign and overflow input logic [P.NE+1:0] FullRe, // Re with bits to determine sign and overflow
input logic [P.NE+1:0] Me, // exponent of the normalized sum input logic [P.NE+1:0] Me, // exponent of the normalized sum
// rounding // rounding
input logic Plus1, // do you add one for rounding input logic Plus1, // do you add one for rounding
input logic Round, Guard, Sticky, // bits used to determine rounding input logic Round, Guard, Sticky, // bits used to determine rounding
input logic UfPlus1, // do you add one for rounding for the unbounded exponent result input logic UfPlus1, // do you add one for rounding for the unbounded exponent result
// convert // convert
input logic CvtOp, // conversion opperation? input logic CvtOp, // conversion opperation?
input logic ToInt, // convert to integer input logic ToInt, // convert to integer
input logic IntToFp, // convert integer to floating point input logic IntToFp, // convert integer to floating point
input logic Int64, // convert to 64 bit integer input logic Int64, // convert to 64 bit integer
input logic Signed, // convert to a signed integer input logic Signed, // convert to a signed integer
input logic [P.NE:0] CvtCe, // the calculated expoent - Cvt input logic [P.NE:0] CvtCe, // the calculated expoent - Cvt
input logic [1:0] CvtNegResMsbs, // the negitive integer result's most significant bits input logic [1:0] CvtNegResMsbs, // the negitive integer result's most significant bits
// divsqrt // divsqrt
input logic DivOp, // conversion opperation? input logic DivOp, // conversion opperation?
input logic Sqrt, // Sqrt? input logic Sqrt, // Sqrt?
// fma // fma
input logic FmaOp, // Fma opperation? input logic FmaOp, // Fma opperation?
input logic FmaAs, FmaPs, // the product and modified Z signs input logic FmaAs, FmaPs, // the product and modified Z signs
// flags // flags
output logic DivByZero, // divide by zero flag output logic DivByZero, // divide by zero flag
output logic Overflow, // overflow flag to select result output logic Overflow, // overflow flag to select result
output logic Invalid, // invalid flag to select the result output logic Invalid, // invalid flag to select the result
output logic IntInvalid, // invalid integer result to select output logic IntInvalid, // invalid integer result to select
output logic [4:0] PostProcFlg // flags output logic [4:0] PostProcFlg // flags
); );
logic SigNaN; // is an input a signaling NaN logic SigNaN; // is an input a signaling NaN
logic Inexact; // final inexact flag logic Inexact; // final inexact flag
logic FpInexact; // floating point inexact flag logic FpInexact; // floating point inexact flag
logic IntInexact; // integer inexact flag logic IntInexact; // integer inexact flag
logic FmaInvalid; // integer invalid flag logic FmaInvalid; // integer invalid flag
logic DivInvalid; // integer invalid flag logic DivInvalid; // integer invalid flag
logic Underflow; // Underflow flag logic Underflow; // Underflow flag
logic ResExpGteMax; // is the result greater than or equal to the maximum floating point expoent logic ResExpGteMax; // is the result greater than or equal to the maximum floating point expoent
logic ShiftGtIntSz; // is the shift greater than the the integer size (use Re to account for possible roundning "shift") logic ShiftGtIntSz; // is the shift greater than the the integer size (use Re to account for possible roundning "shift")
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// Overflow // Overflow
@ -86,7 +86,7 @@ module flags import cvw::*; #(parameter cvw_t P) (
// 65 = ...0 0 0 0 0 1 0 0 0 0 0 1 // 65 = ...0 0 0 0 0 1 0 0 0 0 0 1
// | or | | or | // | or | | or |
// 33 = ...0 0 0 0 0 0 1 0 0 0 0 1 // 33 = ...0 0 0 0 0 0 1 0 0 0 0 1
// | or | | or | // | or | | or |
// larger or equal if: // larger or equal if:
// - any of the bits after the most significan 1 is one // - any of the bits after the most significan 1 is one
// - the most signifcant in 65 or 33 is still a one in the number and // - the most signifcant in 65 or 33 is still a one in the number and
@ -102,9 +102,9 @@ module flags import cvw::*; #(parameter cvw_t P) (
end else if (P.FPSIZES == 3) begin end else if (P.FPSIZES == 3) begin
always_comb always_comb
case (OutFmt) case (OutFmt)
P.FMT: ResExpGteMax = &FullRe[P.NE-1:0] | FullRe[P.NE]; P.FMT: ResExpGteMax = &FullRe[P.NE-1:0] | FullRe[P.NE];
P.FMT1: ResExpGteMax = &FullRe[P.NE1-1:0] | (|FullRe[P.NE:P.NE1]); P.FMT1: ResExpGteMax = &FullRe[P.NE1-1:0] | (|FullRe[P.NE:P.NE1]);
P.FMT2: ResExpGteMax = &FullRe[P.NE2-1:0] | (|FullRe[P.NE:P.NE2]); P.FMT2: ResExpGteMax = &FullRe[P.NE2-1:0] | (|FullRe[P.NE:P.NE2]);
default: ResExpGteMax = 1'bx; default: ResExpGteMax = 1'bx;
endcase endcase
assign ShiftGtIntSz = (|FullRe[P.NE:7]|(FullRe[6]&~Int64)) | ((|FullRe[4:0]|(FullRe[5]&Int64))&((FullRe[5]&~Int64) | FullRe[6]&Int64)); assign ShiftGtIntSz = (|FullRe[P.NE:7]|(FullRe[6]&~Int64)) | ((|FullRe[4:0]|(FullRe[5]&Int64))&((FullRe[5]&~Int64) | FullRe[6]&Int64));
@ -120,7 +120,6 @@ module flags import cvw::*; #(parameter cvw_t P) (
assign ShiftGtIntSz = (|FullRe[P.Q_NE:7]|(FullRe[6]&~Int64)) | ((|FullRe[4:0]|(FullRe[5]&Int64))&((FullRe[5]&~Int64) | FullRe[6]&Int64)); assign ShiftGtIntSz = (|FullRe[P.Q_NE:7]|(FullRe[6]&~Int64)) | ((|FullRe[4:0]|(FullRe[5]&Int64))&((FullRe[5]&~Int64) | FullRe[6]&Int64));
end end
// calulate overflow flag: // calulate overflow flag:
// if the result is greater than or equal to the max exponent(not taking into account sign) // if the result is greater than or equal to the max exponent(not taking into account sign)
// | and the exponent isn't negitive // | and the exponent isn't negitive
@ -142,7 +141,6 @@ module flags import cvw::*; #(parameter cvw_t P) (
// | | | | | | // | | | | | |
assign Underflow = ((FullRe[P.NE+1] | (FullRe == 0) | ((FullRe == 1) & (Me == 0) & ~(UfPlus1&Guard)))&(Round|Sticky|Guard))&~(InfIn|NaNIn|DivByZero|Invalid); assign Underflow = ((FullRe[P.NE+1] | (FullRe == 0) | ((FullRe == 1) & (Me == 0) & ~(UfPlus1&Guard)))&(Round|Sticky|Guard))&~(InfIn|NaNIn|DivByZero|Invalid);
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// Inexact // Inexact
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
@ -199,7 +197,6 @@ module flags import cvw::*; #(parameter cvw_t P) (
// - don't set flag if an input is NaN or Inf(IEEE says has to be a finite numerator) // - don't set flag if an input is NaN or Inf(IEEE says has to be a finite numerator)
assign DivByZero = YZero&DivOp&~Sqrt&~(XZero|NaNIn|InfIn); assign DivByZero = YZero&DivOp&~Sqrt&~(XZero|NaNIn|InfIn);
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// final flags // final flags
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
@ -209,7 +206,3 @@ module flags import cvw::*; #(parameter cvw_t P) (
assign PostProcFlg = {Invalid|(IntInvalid&CvtOp&ToInt), DivByZero, Overflow&~(ToInt&CvtOp), Underflow&~(ToInt&CvtOp), Inexact}; assign PostProcFlg = {Invalid|(IntInvalid&CvtOp&ToInt), DivByZero, Overflow&~(ToInt&CvtOp), Underflow&~(ToInt&CvtOp), Inexact};
endmodule endmodule