Xavi/cvw
1
0
Fork 0
forked from Github_Repos/cvw
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Begin commenting divsqrt

Browse Source
This commit is contained in:
Cedar Turek 2022-12-30 10:43:02 -08:00
parent aca6f0d4e6
commit 3115df9380
1 changed files with 32 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
pipelined/src/fpu/fdivsqrt/fdivsqrt.sv
View File

@ -56,6 +56,8 @@ module fdivsqrt(
// output logic [`XLEN-1:0] RemM,
);
// Floating-point division and square root module, with optional integer division and remainder
logic [`DIVb+3:0] WS, WC;
logic [`DIVb+3:0] X;
logic [`DIVb-1:0] D;
@ -63,29 +65,43 @@ module fdivsqrt(
logic [`DIVb:0] FirstU, FirstUM;
logic [`DIVb+1:0] FirstC;
logic Firstun;
logic WZeroE, AZeroM, BZeroM, AZeroE, BZeroE;
logic SpecialCaseM, MDUM;
logic WZeroE;
logic SpecialCaseM;
logic DivStartE;
// Integer div/rem signals
logic AZeroM, BZeroM, AZeroE, BZeroE, MDUM;
logic [`DIVBLEN:0] nE, nM, mM;
logic NegQuotM, ALTBM, AsM, W64M;
logic DivStartE;
logic [`XLEN-1:0] AM;
fdivsqrtpreproc fdivsqrtpreproc(
.clk, .IFDivStartE, .Xm(XmE), .QeM, .Xe(XeE), .Fmt(FmtE), .Ye(YeE),
.Sqrt(SqrtE), .Ym(YmE), .XZeroE, .X, .DPreproc, .AM, .MDUM, .W64M,
.nE, .nM, .mM, .NegQuotM, .ALTBM, .AZeroM, .BZeroM, .AZeroE, .BZeroE, .AsM,
.ForwardedSrcAE, .ForwardedSrcBE, .Funct3E, .MDUE, .W64E);
fdivsqrtfsm fdivsqrtfsm(
.clk, .reset, .FmtE, .XsE, .SqrtE, .nE,
.FDivBusyE, .FDivStartE, .IDivStartE, .IFDivStartE, .FDivDoneE, .StallM, .FlushE,
.XZeroE, .YZeroE, .AZeroE, .BZeroE,
.XNaNE, .YNaNE, .MDUE,
.XInfE, .YInfE, .WZeroE, .SpecialCaseM);
fdivsqrtiter fdivsqrtiter(
fdivsqrtpreproc fdivsqrtpreproc( // Preprocessor
// Inputs
.clk, .IFDivStartE, .Xm(XmE), .Ym(YmE), .Xe(XeE), .Ye(YeE),
.Fmt(FmtE), .Sqrt(SqrtE), .XZeroE, .Funct3E,
// Int-specific Inputs
.ForwardedSrcAE, .ForwardedSrcBE, .MDUE, .W64E,
// Outputs
.QeM, .X, .DPreproc,
// Int-specific Outputs
.AZeroE, .BZeroE, .nE,
.AZeroM, .BZeroM, .nM, .mM, .AM,
.MDUM, .W64M, .NegQuotM, .ALTBM, .AsM);
fdivsqrtfsm fdivsqrtfsm( // FSM
// Inputs
.clk, .reset, .FmtE, .XInfE, .YInfE,
.XZeroE, .YZeroE, .XNaNE, .YNaNE,
.FDivStartE, .XsE, .SqrtE, .WZeroE,
.FlushE, .StallM,
// Int-specific Inputs
.IDivStartE, .AZeroE, .BZeroE, .nE, .MDUE,
// Outputs
.FDivBusyE, .IFDivStartE, .FDivDoneE, .SpecialCaseM);
fdivsqrtiter fdivsqrtiter( // CSA Iterator
.clk, .Firstun, .D, .FirstU, .FirstUM, .FirstC, .SqrtE,
.X,.DPreproc, .FirstWS(WS), .FirstWC(WC),
.IFDivStartE, .FDivBusyE);
fdivsqrtpostproc fdivsqrtpostproc(
fdivsqrtpostproc fdivsqrtpostproc( // Postprocessor
.clk, .reset, .StallM,
.WS, .WC, .D, .FirstU, .FirstUM, .FirstC, .SqrtE, .Firstun,
.SqrtM, .SpecialCaseM, .RemOpM(Funct3M[1]), .AM,