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pConstpConst
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Done slicer functions as a parametrized SV class
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+100
-20
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3 files changed

+100
-20
lines changed

‎arbitrary_slicer_2d.sv renamed to ‎slicer_2d.sv

+10-10
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
//------------------------------------------------------------------------------
2-
// arbitrary_slicer_2d.sv
2+
// slicer_2d.sv
33
// Konstantin Pavlov, [email protected]
44
//------------------------------------------------------------------------------
55

@@ -16,12 +16,12 @@
1616

1717
/* --- INSTANTIATION TEMPLATE BEGIN ---
1818
19-
arbitrary_slicer_2d #(
20-
.I2_HI( 3 ), .I2_LO( 0 ),
21-
.I1_HI( 7 ), .I1_LO( 0 ),
19+
slicer_2d #(
20+
.I2_HI( 3 ), .I2_LO( 0 ),
21+
.I1_HI( 7 ), .I1_LO( 0 ),
2222
23-
.O2_HI( 2 ), .O2_LO( 1 ),
24-
.O1_HI( 2 ), .O1_LO( 1 )
23+
.O2_HI( 2 ), .O2_LO( 1 ),
24+
.O1_HI( 2 ), .O1_LO( 1 )
2525
) S1 (
2626
.in ( a[3:0][7:0] ),
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.out( b[2:1][2:1] )
@@ -30,7 +30,7 @@ arbitrary_slicer_2d #(
3030
--- INSTANTIATION TEMPLATE END ---*/
3131

3232

33-
module arbitrary_slicer_3d #( parameter
33+
module slicer_2d #( parameter
3434

3535
// input array shape
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I2_HI = 3, // most significant size
@@ -54,9 +54,9 @@ module arbitrary_slicer_3d #( parameter
5454
integer i;
5555
always_comb begin
5656

57-
for ( i=O2_LO; i<=O2_HI; i++ ) begin
58-
out[i][O1_HI:O1_LO] = in[i][O1_HI:O1_LO];
59-
end
57+
for ( i=O2_LO; i<=O2_HI; i++ ) begin
58+
out[i][O1_HI:O1_LO] = in[i][O1_HI:O1_LO];
59+
end
6060

6161
end
6262

‎arbitrary_slicer_3d.sv renamed to ‎slicer_3d.sv

+10-10
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
//------------------------------------------------------------------------------
2-
// arbitrary_slicer_3d.sv
2+
// slicer_3d.sv
33
// Konstantin Pavlov, [email protected]
44
//------------------------------------------------------------------------------
55

@@ -16,14 +16,14 @@
1616

1717
/* --- INSTANTIATION TEMPLATE BEGIN ---
1818
19-
arbitrary_slicer_3d #(
20-
.I3_HI( 3 ), .I3_LO( 0 ),
21-
.I2_HI( 3 ), .I2_LO( 0 ),
22-
.I1_HI( 7 ), .I1_LO( 0 ),
19+
slicer_3d #(
20+
.I3_HI( 3 ), .I3_LO( 0 ),
21+
.I2_HI( 3 ), .I2_LO( 0 ),
22+
.I1_HI( 7 ), .I1_LO( 0 ),
2323
24-
.O3_HI( 2 ), .O3_LO( 1 ),
25-
.O2_HI( 2 ), .O2_LO( 1 ),
26-
.O1_HI( 2 ), .O1_LO( 1 )
24+
.O3_HI( 2 ), .O3_LO( 1 ),
25+
.O2_HI( 2 ), .O2_LO( 1 ),
26+
.O1_HI( 2 ), .O1_LO( 1 )
2727
) S1 (
2828
.in ( a[3:0][3:0][7:0] ),
2929
.out( b[2:1][2:1][2:1] )
@@ -32,7 +32,7 @@ arbitrary_slicer_3d #(
3232
--- INSTANTIATION TEMPLATE END ---*/
3333

3434

35-
module arbitrary_slicer_3d #( parameter
35+
module slicer_3d #( parameter
3636

3737
// input array shape
3838
I3_HI = 3, // most significant size
@@ -45,7 +45,7 @@ module arbitrary_slicer_3d #( parameter
4545
I1_LO = 0,
4646

4747
// sliced array shape
48-
O3_HI = 2, // most significant size
48+
O3_HI = 2, // most significant size
4949
O3_LO = 1,
5050

5151
O2_HI = 2,

‎slicer_functions.vh

+80
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,80 @@
1+
//------------------------------------------------------------------------------
2+
// slicer_functions.vh
3+
// published as part of https://github.com/pConst/basic_verilog
4+
// Konstantin Pavlov, [email protected]
5+
//------------------------------------------------------------------------------
6+
7+
// INFO ------------------------------------------------------------------------
8+
// Arbitrary slice functions for 2D and 3D packed SystemVerilog arrays
9+
// Slices along any array edge, all array sides simultaneously
10+
//
11+
// You can also generalize this aproach to support as many dimentions as needed
12+
//
13+
// This module does NOT consume any FPGA resources though it is absolutely
14+
// synthesizable
15+
//
16+
// Parametrized classes are supported by Vivado, NOT supported by Quartus.
17+
// Please use slicer_2d.sv and slicer_3d.sv conventional modules instead.
18+
//
19+
// Call syntax:
20+
// ============
21+
// assign a[2:1][2:1] = slicer_functions#(
22+
// .I2_HI( 3 ), .I2_LO( 0 ), .I1_HI( 7 ), .I1_LO( 0 ),
23+
// .O2_HI( 2 ), .O2_LO( 1 ), .O1_HI( 2 ), .O1_LO( 1 ) )::slice2d( b[3:0][7:0] );
24+
//
25+
// assign c[2:1][2:1][2:1] = slicer_functions#(
26+
// .I3_HI( 3 ), .I3_LO( 0 ), .I2_HI( 3 ), .I2_LO( 0 ),
27+
// .I1_HI( 7 ), .I1_LO( 0 ), .O3_HI( 2 ), .O3_LO( 1 ),
28+
// .O2_HI( 2 ), .O2_LO( 1 ), .O1_HI( 2 ), .O1_LO( 1 ) )::slice3d( d[3:0][3:0][7:0] );
29+
//
30+
31+
32+
virtual class slicer_functions #( parameter
33+
34+
// input array shape
35+
I3_HI = 3, // most significant size
36+
I3_LO = 0,
37+
38+
I2_HI = 3,
39+
I2_LO = 0,
40+
41+
I1_HI = 7, // least significant size
42+
I1_LO = 0,
43+
44+
// sliced array shape
45+
O3_HI = 2, // most significant size
46+
O3_LO = 1,
47+
48+
O2_HI = 2,
49+
O2_LO = 1,
50+
51+
O1_HI = 2, // least significant size
52+
O1_LO = 1
53+
);
54+
55+
56+
static function [O2_HI:O2_LO][O1_HI:O1_LO] slice2d(
57+
input [I2_HI:I2_LO][I1_HI:I1_LO] in
58+
);
59+
60+
integer i;
61+
for ( i=O2_LO; i<=O2_HI; i++ ) begin
62+
slice2d[i][O1_HI:O1_LO] = in[i][O1_HI:O1_LO];
63+
end //i
64+
endfunction
65+
66+
67+
static function [O3_HI:O3_LO][O2_HI:O2_LO][O1_HI:O1_LO] slice3d(
68+
input [I3_HI:I3_LO][I2_HI:I2_LO][I1_HI:I1_LO] in
69+
);
70+
71+
integer i,j;
72+
for ( i=O3_LO; i<=O3_HI; i++ ) begin
73+
for ( j=O2_LO; j<=O2_HI; j++ ) begin
74+
slice3d[i][j][O1_HI:O1_LO] = in[i][j][O1_HI:O1_LO];
75+
end //j
76+
end //i
77+
endfunction
78+
79+
endclass
80+

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