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Line 1... |
`timescale 1ns / 1ps
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`timescale 1ns / 1ps
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// ============================================================================
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// ============================================================================
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// __
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// __
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// \\__/ o\ (C) 2006-2016 Robert Finch, Waterloo
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// \\__/ o\ (C) 2006-2019 Robert Finch, Waterloo
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// \ __ / All rights reserved.
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// \ __ / All rights reserved.
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// \/_// robfinch<remove>@finitron.ca
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// \/_// robfinch<remove>@finitron.ca
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// ||
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// ||
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//
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//
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// fpLOOUnit.v
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// fpLOOUnit.v
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Line 28... |
// i2f - convert integer to floating point
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// i2f - convert integer to floating point
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// f2i - convert floating point to integer
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// f2i - convert floating point to integer
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//
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//
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// ============================================================================
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// ============================================================================
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`define FLOAT 6'h36
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`define FLT1 4'h1
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`define FTOI 6'h02
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`define FLT2 4'h2
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`define ITOF 6'h03
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`define FTOI 5'h02
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`define ITOF 5'h03
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`define TRUNC 5'h15
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`define NXTAFT 5'h0B
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module fpLOOUnit
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module fpLOOUnit
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#(parameter WID=32)
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#(parameter WID=32)
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(
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(
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input clk,
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input clk,
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input ce,
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input ce,
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input [31:0] ir,
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input [3:0] op4,
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input [4:0] func5,
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input [2:0] rm,
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input [WID-1:0] a,
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input [WID-1:0] a,
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input [WID-1:0] b,
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output reg [WID-1:0] o,
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output reg [WID-1:0] o,
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output done
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output done
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);
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);
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localparam MSB = WID-1;
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`include "fpSize.sv"
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localparam EMSB = WID==128 ? 14 :
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WID==96 ? 14 :
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WID==80 ? 14 :
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WID==64 ? 10 :
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WID==52 ? 10 :
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WID==48 ? 10 :
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WID==44 ? 10 :
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WID==42 ? 10 :
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WID==40 ? 9 :
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WID==32 ? 7 :
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WID==24 ? 6 : 4;
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localparam FMSB = WID==128 ? 111 :
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WID==96 ? 79 :
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WID==80 ? 63 :
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WID==64 ? 51 :
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WID==52 ? 39 :
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WID==48 ? 35 :
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WID==44 ? 31 :
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WID==42 ? 29 :
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WID==40 ? 28 :
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WID==32 ? 22 :
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WID==24 ? 15 : 9;
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wire [WID-1:0] i2f_o;
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wire [WID-1:0] i2f_o;
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wire [WID-1:0] f2i_o;
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wire [WID-1:0] f2i_o;
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wire [5:0] op = ir[5:0];
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wire [WID-1:0] trunc_o;
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wire [5:0] fn = ir[17:12];
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wire [WID-1:0] nxtaft_o;
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wire [2:0] rm = ir[26:24];
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wire [1:0] prec = ir[28:27];
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delay1 u1 (
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.clk(clk),
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delay1 u1 (.clk(clk), .ce(ce), .i(op==`FLOAT && (fn==`ITOF||fn==`FTOI)), .o(done) );
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.ce(ce),
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i2f #(WID) ui2fs (.clk(clk), .ce(ce), .rm(rm), .i(a), .o(i2f_o) );
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.i((op4==`FLT1 && (func5==`ITOF||func5==`FTOI||func5==`TRUNC))||(op4==`FLT2 && (func5==`NXTAFT))),
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f2i #(WID) uf2is (.clk(clk), .ce(ce), .i(a), .o(f2i_o) );
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.o(done) );
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i2f #(WID-4) ui2fs (.clk(clk), .ce(ce), .rm(rm), .i(a[WID-1:4]), .o(i2f_o) );
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f2i #(WID-4) uf2is (.clk(clk), .ce(ce), .i(a[WID-1:4]), .o(f2i_o) );
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fpTrunc #(WID) urho1 (.clk(clk), .ce(ce), .i(a), .o(trunc_o), .overflow());
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fpNextAfter #(WID-4) una1 (.clk(clk), .ce(ce), .a(a[WID-1:4]), .b(b[WID-1:4]), .o(nxtaft_o));
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always @*
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always @*
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case (op)
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case (op4)
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`FLOAT:
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`FLT1:
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case(fn)
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case(func5)
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`ITOF: o <= i2f_o;
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`ITOF: o <= {i2f_o,4'h0};
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`FTOI: o <= f2i_o;
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`FTOI: o <= {f2i_o,4'h0};
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`TRUNC: o <= trunc_o;
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default: o <= 0;
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endcase
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`FLT2:
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case(func5)
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`NXTAFT: o <= {nxtaft_o,4'h0};
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default: o <= 0;
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default: o <= 0;
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endcase
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endcase
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default: o <= 0;
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default: o <= 0;
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endcase
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endcase
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