From: Adam Krolnik (adamk@cyrix.com)
Date: Tue Sep 15 1998 - 02:20:20 PDT
Yet Another version of this proposal.
Example code:
Example 1. Indexed part select in procedural code.
task update_longword;
inout[63:0] long;
input[2:0] byte_index;
input[7:0] byte;
begin
long[7+8*byte_index:8*byte_index] = byte;
end
endtask
<p>Example 2. Indexed part select in a continuous assignment.
wire [0:63] data;
wire [0:2] select;
wire [0:7] muxed_byte = data[select, 3'b0: select, 3'b0 + 7];
Changes:
Net continuous assignments shall not allow indexed part-selects as lvalues for
assignments.
Added changes to Table 6-1 and Section 9.2.
Removed BNF specification for net_lvalue.
[Only added for Stu - I don't care! These statements to me are equivalent:
wire [15:0] data;
assign data[8*side+7:8*side] = newdata[7:0]; // Form 1.
assign data = side ? {newdata[7:0], data[7:0]} : {data[15:8], newdata[7:0]}; //Form2
]
[An attachment was originally included here]
Adam Krolnik
Verification Engineer
Cyrix - NSC.
Richardson TX. 75085
<x-rich>
<p><p>Yet Another version of this proposal.
<p>Example code:
<p>Example 1. Indexed part select in procedural code.
<p>task update_longword;
inout[63:0] long;
input[2:0] byte_index;
input[7:0] byte;
begin
long[7+8*byte_index:8*byte_index] = byte;
end
endtask
<p><p>Example 2. Indexed part select in a continuous assignment.
<p>wire [0:63] data;
wire [0:2] select;
wire [0:7] muxed_byte = data[select, 3'b0: select, 3'b0 + 7];
<p>Changes:
<p>Net continuous assignments shall not allow indexed part-selects as lvalues for
assignments.
Added changes to Table 6-1 and Section 9.2.
Removed BNF specification for net_lvalue.
<p>[Only added for Stu - I don't care! These statements to me are equivalent:
<p>wire [15:0] data;
assign data[8*side+7:8*side] = newdata[7:0]; // Form 1.
<p>assign data = side ? newdata[7:0], data[7:0] : data[15:8], newdata[7:0]; //Form2
<p>]
<p></x-rich>
Attachment Converted: "E:\INCOMING\B13_mutable_part_selects-396-12-406-14.html"
<x-rich>
<p> Adam Krolnik
Verification Engineer
Cyrix - NSC.
Richardson TX. 75085
<p></x-rich>
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