diff --git a/pipelined/srt/srt.sv b/pipelined/srt/srt.sv index 044bac9c1..bc272b011 100644 --- a/pipelined/srt/srt.sv +++ b/pipelined/srt/srt.sv @@ -37,6 +37,8 @@ module srt #(parameter Nf=52) ( input logic Flush, // *** multiple pipe stages // Floating Point Inputs // later add exponents, signs, special cases + input logic [10:0] SrcXExpE, SrcYExpE, // exponents, for double precision exponents are 11 bits + // end of floating point inputs input logic [Nf-1:0] SrcXFrac, SrcYFrac, input logic [`XLEN-1:0] SrcA, SrcB, input logic [1:0] Fmt, // Floats: 00 = 16 bit, 01 = 32 bit, 10 = 64 bit, 11 = 128 bit @@ -45,6 +47,7 @@ module srt #(parameter Nf=52) ( input logic Int, // Choose integer inputss input logic Sqrt, // perform square root, not divide output logic [Nf-1:0] Quot, Rem, // *** later handle integers + output logic [10:0] Exp, // output exponent is hardcoded for 11 bits for double precision output logic [3:0] Flags ); @@ -78,6 +81,9 @@ module srt #(parameter Nf=52) ( // Partial Product Generation csa csa(WS, WC, Dsel, qp, WSA, WCA); + // Exponent division + exp exp(SrcXExpE, SrcYExpE, Exp); + srtpostproc postproc(rp, rm, Quot); endmodule @@ -247,6 +253,14 @@ module csa #(parameter N=56) ( (in2[54:0] & in3[54:0]), cin}; endmodule +////////////// +// exponent // +////////////// +module exp(input [10:0] e1, e2, + output [10:0] e); // for double precision, exponent is 11 bits + assign e = (e1 - e2) + 11'd1023; // bias is hardcoded +endmodule + ////////////// // finaladd // //////////////