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Done slicer functions as a parametrized SV class
This commit is contained in:
Konstantin Pavlov
parent
276aea1e87
commit
014b8c53e2
@ -1,5 +1,5 @@
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//------------------------------------------------------------------------------
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// arbitrary_slicer_2d.sv
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// slicer_2d.sv
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// Konstantin Pavlov, pavlovconst@gmail.com
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//------------------------------------------------------------------------------
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@ -16,12 +16,12 @@
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/* --- INSTANTIATION TEMPLATE BEGIN ---
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arbitrary_slicer_2d #(
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.I2_HI( 3 ), .I2_LO( 0 ),
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.I1_HI( 7 ), .I1_LO( 0 ),
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slicer_2d #(
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.I2_HI( 3 ), .I2_LO( 0 ),
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.I1_HI( 7 ), .I1_LO( 0 ),
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.O2_HI( 2 ), .O2_LO( 1 ),
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.O1_HI( 2 ), .O1_LO( 1 )
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.O2_HI( 2 ), .O2_LO( 1 ),
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.O1_HI( 2 ), .O1_LO( 1 )
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) S1 (
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.in ( a[3:0][7:0] ),
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.out( b[2:1][2:1] )
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@ -30,7 +30,7 @@ arbitrary_slicer_2d #(
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--- INSTANTIATION TEMPLATE END ---*/
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module arbitrary_slicer_3d #( parameter
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module slicer_2d #( parameter
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// input array shape
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I2_HI = 3, // most significant size
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@ -54,9 +54,9 @@ module arbitrary_slicer_3d #( parameter
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integer i;
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always_comb begin
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for ( i=O2_LO; i<=O2_HI; i++ ) begin
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out[i][O1_HI:O1_LO] = in[i][O1_HI:O1_LO];
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end
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for ( i=O2_LO; i<=O2_HI; i++ ) begin
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out[i][O1_HI:O1_LO] = in[i][O1_HI:O1_LO];
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end
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end
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@ -1,5 +1,5 @@
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//------------------------------------------------------------------------------
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// arbitrary_slicer_3d.sv
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// slicer_3d.sv
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// Konstantin Pavlov, pavlovconst@gmail.com
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//------------------------------------------------------------------------------
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@ -16,14 +16,14 @@
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/* --- INSTANTIATION TEMPLATE BEGIN ---
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arbitrary_slicer_3d #(
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.I3_HI( 3 ), .I3_LO( 0 ),
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.I2_HI( 3 ), .I2_LO( 0 ),
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.I1_HI( 7 ), .I1_LO( 0 ),
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slicer_3d #(
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.I3_HI( 3 ), .I3_LO( 0 ),
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.I2_HI( 3 ), .I2_LO( 0 ),
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.I1_HI( 7 ), .I1_LO( 0 ),
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.O3_HI( 2 ), .O3_LO( 1 ),
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.O2_HI( 2 ), .O2_LO( 1 ),
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.O1_HI( 2 ), .O1_LO( 1 )
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.O3_HI( 2 ), .O3_LO( 1 ),
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.O2_HI( 2 ), .O2_LO( 1 ),
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.O1_HI( 2 ), .O1_LO( 1 )
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) S1 (
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.in ( a[3:0][3:0][7:0] ),
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.out( b[2:1][2:1][2:1] )
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@ -32,7 +32,7 @@ arbitrary_slicer_3d #(
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--- INSTANTIATION TEMPLATE END ---*/
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module arbitrary_slicer_3d #( parameter
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module slicer_3d #( parameter
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// input array shape
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I3_HI = 3, // most significant size
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@ -45,7 +45,7 @@ module arbitrary_slicer_3d #( parameter
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I1_LO = 0,
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// sliced array shape
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O3_HI = 2, // most significant size
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O3_HI = 2, // most significant size
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O3_LO = 1,
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O2_HI = 2,
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80
slicer_functions.vh
Normal file
80
slicer_functions.vh
Normal file
@ -0,0 +1,80 @@
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//------------------------------------------------------------------------------
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// slicer_functions.vh
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// published as part of https://github.com/pConst/basic_verilog
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// Konstantin Pavlov, pavlovconst@gmail.com
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//------------------------------------------------------------------------------
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// INFO ------------------------------------------------------------------------
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// Arbitrary slice functions for 2D and 3D packed SystemVerilog arrays
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// Slices along any array edge, all array sides simultaneously
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//
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// You can also generalize this aproach to support as many dimentions as needed
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//
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// This module does NOT consume any FPGA resources though it is absolutely
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// synthesizable
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//
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// Parametrized classes are supported by Vivado, NOT supported by Quartus.
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// Please use slicer_2d.sv and slicer_3d.sv conventional modules instead.
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//
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// Call syntax:
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// ============
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// assign a[2:1][2:1] = slicer_functions#(
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// .I2_HI( 3 ), .I2_LO( 0 ), .I1_HI( 7 ), .I1_LO( 0 ),
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// .O2_HI( 2 ), .O2_LO( 1 ), .O1_HI( 2 ), .O1_LO( 1 ) )::slice2d( b[3:0][7:0] );
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//
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// assign c[2:1][2:1][2:1] = slicer_functions#(
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// .I3_HI( 3 ), .I3_LO( 0 ), .I2_HI( 3 ), .I2_LO( 0 ),
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// .I1_HI( 7 ), .I1_LO( 0 ), .O3_HI( 2 ), .O3_LO( 1 ),
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// .O2_HI( 2 ), .O2_LO( 1 ), .O1_HI( 2 ), .O1_LO( 1 ) )::slice3d( d[3:0][3:0][7:0] );
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//
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virtual class slicer_functions #( parameter
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// input array shape
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I3_HI = 3, // most significant size
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I3_LO = 0,
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I2_HI = 3,
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I2_LO = 0,
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I1_HI = 7, // least significant size
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I1_LO = 0,
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// sliced array shape
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O3_HI = 2, // most significant size
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O3_LO = 1,
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O2_HI = 2,
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O2_LO = 1,
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O1_HI = 2, // least significant size
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O1_LO = 1
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);
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static function [O2_HI:O2_LO][O1_HI:O1_LO] slice2d(
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input [I2_HI:I2_LO][I1_HI:I1_LO] in
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);
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integer i;
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for ( i=O2_LO; i<=O2_HI; i++ ) begin
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slice2d[i][O1_HI:O1_LO] = in[i][O1_HI:O1_LO];
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end //i
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endfunction
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static function [O3_HI:O3_LO][O2_HI:O2_LO][O1_HI:O1_LO] slice3d(
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input [I3_HI:I3_LO][I2_HI:I2_LO][I1_HI:I1_LO] in
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);
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integer i,j;
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for ( i=O3_LO; i<=O3_HI; i++ ) begin
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for ( j=O2_LO; j<=O2_HI; j++ ) begin
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slice3d[i][j][O1_HI:O1_LO] = in[i][j][O1_HI:O1_LO];
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end //j
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end //i
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endfunction
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endclass
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