1076_ina.html

basic exemple. Do an ADD of two 4 bits numbers

<p>NOW <a href="./1076_14.HTM#E'PATH_NAME">14.1</a>, <a href="./1076_14.HTM#PED_NUM_SUBT">14.2</a>
</ul>
<p>pure <a href="./1076_2.HTM#2">2</a>, <a href="./1076_2.HTM#2.2">2.2</a>, <a href="./1076_2.HTM#2.7">2.7</a>, <a href="./1076_7.HTM#7.4.2">7.4.2</a><br>resolution <a href="./1076_2.HTM#2.4">2.4</a>, <a href="./1076_4.HTM#4.2">4.2</a><br>returned values <a href="./1076_8.HTM#8.12">8.12</a><br>syntax <a href="./1076_2.HTM#2.1">2.1</a><br>usage <a href="./1076_2.HTM#2">2</a><br>where used <a href="./1076_4.HTM#4.3.2.2">4.3.2.2</a>
</ul>
<p>Functions, see also Return statements.<br>Generate parameters
<ul>
<p>as objects <a href="./1076_4.HTM#4.3">4.3</a><br>constants <a href="./1076_4.HTM#4.3.1.1">4.3.1.1</a>, <a href="./1076_12.HTM#12.4.2">12.4.2</a><br>usage <a href="./1076_4.HTM#4.3">4.3</a>
<ul>
<p>as globally static primaries <a href="./1076_7.HTM#7.4.2">7.4.2</a>
</ul>
</ul>
<p>Generate statements
<ul>
<p>as declarative regions <a href="./1076_10.HTM#10.1">10.1</a><br>defining internal blocks <a href="./1076_1.HTM#1.3.1">1.3.1</a><br>described <a href="./1076_9.HTM#9.7">9.7</a><br>elaboration of <a href="./1076_12.HTM#12.4.2">12.4.2</a><br>labels <a href="./1076_1.HTM#1.3.1">1.3.1</a>
<ul>
<p>elaboration of <a href="./1076_12.HTM#12.4.2">12.4.2</a><br>where used <a href="./1076_1.HTM#1.3.1">1.3.1</a>
</ul>
<p>syntax <a href="./1076_9.HTM#9.7">9.7</a><br>where used <a href="./1076_9.HTM#9">9</a>
</ul>
<p>Generation schemes
<ul>
<p>syntax <a href="./1076_9.HTM#9.7">9.7</a><br>where used <a href="./1076_9.HTM#9.7">9.7</a>
</ul>
<p>Generic clauses
<ul>
<p>elaboration of <a href="./1076_12.HTM#12.2.1">12.2.1</a><br>syntax <a href="./1076_1.HTM#1.1.1">1.1.1</a><br>where used <a href="./1076_4.HTM#4.5">4.5</a>, <a href="./1076_9.HTM#9.1">9.1</a>
</ul>
<p>Generic lists
<ul>
<p>defined <a href="./1076_1.HTM#1.1.1">1.1.1</a><br>syntax <a href="./1076_1.HTM#1.1.1.1">1.1.1.1</a><br>where used <a href="./1076_1.HTM#1.1.1">1.1.1</a>
</ul>
<p>Generic map aspect
<ul>
<p>default <a href="./1076_5.HTM#5.2.1.2">5.2.1.2</a><br>described <a href="./1076_5.HTM#5.2.1.2">5.2.1.2</a><br>syntax <a href="./1076_5.HTM#5.2.1.2">5.2.1.2</a><br>usage <a href="./1076_5.HTM#5.2.1">5.2.1</a><br>where used <a href="./1076_5.HTM#5.2.1">5.2.1</a>, <a href="./1076_9.HTM#9.1">9.1</a>, <a href="./1076_9.HTM#9.6">9.6</a>
</ul>
<p>Generic map aspects
<ul>
<p>elaboration of <a href="./1076_12.HTM#12.2.2">12.2.2</a>
</ul>
<p>Generics
<ul>
<p>constants <a href="./1076_1.HTM#1.1.1">1.1.1</a>, <a href="./1076_4.HTM#4.3.1.1">4.3.1.1</a>, <a href="./1076_12.HTM#12.2.1">12.2.1</a><br>described <a href="./1076_1.HTM#1.1.1.1">1.1.1.1</a><br>formal <a href="./1076_5.HTM#5.2.2">5.2.2</a>
<ul>
<p>in binding indications <a href="./1076_5.HTM#5.2.1">5.2.1</a><br>in block headers <a href="./1076_9.HTM#9.1">9.1</a>
</ul>
<p>in top-level design entity <a href="./1076_12.HTM#12.1">12.1</a><br>of unconstrained array types <a href="./1076_3.HTM#3.2.1.1">3.2.1.1</a><br>scope of <a href="./1076_10.HTM#10.2">10.2</a><br>where used <a href="./1076_4.HTM#4.3.2.2">4.3.2.2</a>
</ul>
<p>Group constituents
<ul>
<p>syntax <a href="./1076_4.HTM#4.7">4.7</a><br>where used <a href="./1076_4.HTM#4.7">4.7</a>
</ul>
<p>Group declarations
<ul>
<p>described <a href="./1076_4.HTM#4.6">4.6</a><code>, <a href="./1076_4.HTM#4.7">4.7</a><br></code>syntax <a href="./1076_4.HTM#4.6">4.6</a><br>usage <a href="./1076_4.HTM#4.6">4.6</a><br>where used <a href="./1076_1.HTM#1.1.2">1.1.2</a>, <a href="./1076_1.HTM#1.2.1">1.2.1</a>, <a href="./1076_1.HTM#1.3">1.3</a>, <a href="./1076_2.HTM#2.2">2.2</a>, <a href="./1076_2.HTM#2.5">2.5</a>, <a href="./1076_2.HTM#2.6">2.6</a>, <a href="./1076_9.HTM#9.2">9.2</a>, <a href="./1076_9.HTM#9.2">9.2</a>
</ul>
<p>Group template declarations
<ul>
<p>described <a href="./1076_4.HTM#4.6">4.6</a><br>syntax <a href="./1076_4.HTM#4.6">4.6</a><br>where used <a href="./1076_1.HTM#1.1.2">1.1.2</a>, <a href="./1076_1.HTM#1.2.1">1.2.1</a>, <a href="./1076_2.HTM#2.2">2.2</a>, <a href="./1076_2.HTM#2.5">2.5</a>, <a href="./1076_2.HTM#2.6">2.6</a>, <a href="./1076_9.HTM#9.2">9.2</a>
</ul>
<p>Group templates <a href="./1076_4.HTM#4.6">4.6</a><br>Guarded signal specifications
<ul>
<p>described <a href="./1076_5.HTM#5.3">5.3</a><br>elaboration of <a href="./1076_12.HTM#12.3.2.3">12.3.2.3</a><br>syntax <a href="./1076_5.HTM#5.3">5.3</a><br>where used <a href="./1076_5.HTM#5.3">5.3</a>
</ul>
<p>Guards <a href="./1076_4.HTM#4.3.1.2">4.3.1.2</a>, <a href="./1076_9.HTM#9.1">9.1</a>, <a href="./1076_9.HTM#9.4">9.4</a><br>HIGH attribute <a href="./1076_3.HTM#3.1.4.1">3.1.4.1</a>, <a href="./1076_14.HTM#T'HIGH">14.1:T</a>, <a href="./1076_14.HTM#A'HIGH">14.1:A'</a>, <a href="./1076_14.HTM#14.1">14.1</a><br>Homographs <a href="./1076_10.HTM#10.3">10.3</a>, <a href="./1076_11.HTM#11.2">11.2</a><br>Identifiers <a href="./1076_4.HTM#4.1">4.1</a>
<ul>
<p>basic
<ul>
<p>described <a href="./1076_13.HTM#13.3.1">13.3.1</a><br>syntax <a href="./1076_13.HTM#13.3.1">13.3.1</a><br>where used <a href="./1076_13.HTM#13.3.1">13.3.1</a>
</ul>
<p>extended
<ul>
<p>described <a href="./1076_13.HTM#13.3.2">13.3.2</a><br>syntax <a href="./1076_13.HTM#13.3.2">13.3.2</a><br>where used <a href="./1076_13.HTM#13.3.2">13.3.2</a>
</ul>
<p>of named entities <a href="./1076_4.HTM#4">4</a><br>referenced within their own declarations <a href="./1076_10.HTM#10.3">10.3</a><br>restrictions <a href="./1076_13.HTM#13.9">13.9</a><br>scope of <a href="./1076_10.HTM#10.2">10.2</a><br>separators required between <a href="./1076_13.HTM#13.2">13.2</a><br>simple names for <a href="./1076_0.HTM#0.2.1">0.2.1</a><br>syntax <a href="./1076_13.HTM#13.3.1">13.3.1</a><br>visibility rules for <a href="./1076_10.HTM#10.3">10.3</a>, <a href="./1076_10.HTM#10.4">10.4</a>, <a href="./1076_10.HTM#10.5">10.5</a><br>where used <a href="./1076_1.HTM#1.1">1.1</a>, <a href="./1076_1.HTM#1.2">1.2</a>, <a href="./1076_1.HTM#1.3">1.3</a>, <a href="./1076_11.HTM#11.2">11.2</a><br>with overlapping scopes <a href="./1076_10.HTM#10.3">10.3</a>
</ul>
</ul>
<p>Identifiers, see also Names.<br>IEEE P1164 Standard <a href="./1076_AXE.HTM#ANNEX E">Annex E</a><br>If statements
<ul>
<p>described <a href="./1076_8.HTM#8.7">8.7</a><br>syntax <a href="./1076_8.HTM#8.7">8.7</a><br>usage <a href="./1076_9.HTM#9.5.1">9.5.1</a><br>where used <a href="./1076_8.HTM#8">8</a>, <a href="./1076_9.HTM#9.5.1">9.5.1</a>
</ul>
<p>IMAGE attribute <a href="./1076_14.HTM#T'IMAGE">14.1</a>
<ul>
<p>portability issues <a href="./1076_AXC.HTM#ANNEXC">Annex C</a>
</ul>
<p>Importing data, see Files: external.<br>IN or INOUT ports, see Ports.<br>Incomplete type declarations <a href="./1076_3.HTM#3.3.1">3.3.1</a><br>Index constraints
<ul>
<p>described <a href="./1076_3.HTM#3.2.1.1">3.2.1.1</a><br>elaboration of <a href="./1076_12.HTM#12.3.1.3">12.3.1.3</a><br>globally static <a href="./1076_7.HTM#7.4.2">7.4.2</a><br>in access types <a href="./1076_3.HTM#3.3">3.3</a><br>index ranges of array types <a href="./1076_3.HTM#3.2.1.1">3.2.1.1</a>, <a href="./1076_6.HTM#6.5">6.5</a><br>locally static <a href="./1076_7.HTM#7.4.1">7.4.1</a><br>syntax <a href="./1076_3.HTM#3.2.1">3.2.1</a><br>usage <a href="./1076_7.HTM#7.3.6">7.3.6</a><br>where used <a href="./1076_3.HTM#3.2.1">3.2.1</a>, <a href="./1076_4.HTM#4.2">4.2</a>
</ul>
<p>Index specifications
<ul>
<p>containing discrete ranges <a href="./1076_1.HTM#1.3.1">1.3.1</a><br>syntax <a href="./1076_1.HTM#1.3.1">1.3.1</a><br>where used <a href="./1076_1.HTM#1.3.1">1.3.1</a>
</ul>
<p>Index subtype definitions
<ul>
<p>syntax <a href="./1076_3.HTM#3.2.1">3.2.1</a><br>where used <a href="./1076_3.HTM#3.2.1">3.2.1</a>
</ul>
<p>Index subtypes
<ul>
<p>compatibility with discrete ranges <a href="./1076_3.HTM#3.2.1.1">3.2.1.1</a><br>of shift operators <a href="./1076_7.HTM#7.2.3">7.2.3</a>
</ul>
<p>Instance names, syntax of <a href="./1076_14.HTM#E'INSTANCE_NAME">14.1</a><br>INSTANCE_NAME attribute <a href="./1076_14.HTM#E'INSTANCE_NAME">14.1</a><br>Instantiated units
<ul>
<p>syntax <a href="./1076_9.HTM#9.6">9.6</a><br>where used <a href="./1076_9.HTM#9.6">9.6</a>
</ul>
<p>Instantiation lists
<ul>
<p>syntax <a href="./1076_5.HTM#5.2">5.2</a><br>where used <a href="./1076_5.HTM#5.2">5.2</a>
</ul>
<p>INTEGER type <a href="./1076_3.HTM#3.1.2">3.1.2</a>, <a href="./1076_3.HTM#3.2.1.1">3.2.1.1</a><br>Integer types
<ul>
<p>described <a href="./1076_3.HTM#3.1.2">3.1.2</a><br>elaboration of <a href="./1076_12.HTM#12.3.1.2">12.3.1.2</a><br>predefined <a href="./1076_3.HTM#3.1.2.1">3.1.2.1</a><br>syntax <a href="./1076_3.HTM#3.1.2">3.1.2</a>
</ul>
<p>Integers
<ul>
<p>based <a href="./1076_13.HTM#13.4.2">13.4.2</a><br>syntax <a href="./1076_13.HTM#13.4.2">13.4.2</a><br>where used <a href="./1076_13.HTM#13.4.2">13.4.2</a><code></code>
</ul>
<p>Interface constant declarations
<ul>
<p>described <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>syntax <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>usage <a href="./1076_4.HTM#4.3.3">4.3.3</a><br>where used <a href="./1076_4.HTM#4.3.2.1">4.3.2.1</a>
</ul>
<p>Interface declarations
<ul>
<p>described <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>usage <a href="./1076_4.HTM#4.3.1">4.3.1</a><br>where used <a href="./1076_4.HTM#4.3.2">4.3.2</a>
</ul>
<p>Interface file declarations
<ul>
<p>described <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>syntax <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>where used <a href="./1076_4.HTM#4.3.2.1">4.3.2.1</a>
</ul>
<p>Interface lists
<ul>
<p>described <a href="./1076_4.HTM#4.3.2.1">4.3.2.1</a><br>of formal parameters <a href="./1076_2.HTM#2.1.1">2.1.1</a>
<ul>
<p>elaboration of <a href="./1076_12.HTM#12.3.1.1">12.3.1.1</a>
</ul>
<p>of generics <a href="./1076_1.HTM#1.1.1.1">1.1.1.1</a><br>of ports <a href="./1076_1.HTM#1.1.1.2">1.1.1.2</a><br>where used <a href="./1076_1.HTM#1.1.1.1">1.1.1.1</a>, <a href="./1076_1.HTM#1.1.1.2">1.1.1.2</a>
</ul>
<p>Interface objects
<ul>
<p>defined <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>in top-level design entity <a href="./1076_12.HTM#12.1">12.1</a><br>index ranges
<ul>
<p>obtained by association <a href="./1076_3.HTM#3.2.1.1">3.2.1.1</a><br>of constrained arrays <a href="./1076_3.HTM#3.2.1.1">3.2.1.1</a>
</ul>
<p>specifications related to <a href="./1076_5.HTM#5">5</a><br>where used <a href="./1076_4.HTM#4.5">4.5</a>
</ul>
<p>Interface signal declarations
<ul>
<p>described <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>syntax <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>where used <a href="./1076_4.HTM#4.3.2.1">4.3.2.1</a>
</ul>
<p>Interface variable declarations
<ul>
<p>described <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>syntax <a href="./1076_4.HTM#4.3.2">4.3.2</a><br>where used <a href="./1076_4.HTM#4.3.2.1">4.3.2.1</a>
</ul>
<p>Internal blocks <a href="./1076_1.HTM#1.3.1">1.3.1</a><br>ISO 8859 character set <a href="./1076_3.HTM#3.1.1.1">3.1.1.1</a>, <a href="./1076_13.HTM#13.1">13.1</a>, <a href="./1076_AXE.HTM#ANNEX E">Annex E</a><br>Italics, meaning of <a href="./1076_0.HTM#0.2.1">0.2.1</a>, <a href="./1076_4.HTM#4.1">4.1</a>, <a href="./1076_14.HTM#14.2">14.2</a><br>Iteration schemes
<ul>
<p>FOR loops <a href="./1076_8.HTM#8.9">8.9</a><br>syntax <a href="./1076_8.HTM#8.9">8.9</a><br>where used <a href="./1076_8.HTM#8.9">8.9</a><br>WHILE loops <a href="./1076_8.HTM#8.9">8.9</a>
</ul>
<p>Labels
<ul>
<p>block <a href="./1076_9.HTM#9.1">9.1</a><br>bound <a href="./1076_5.HTM#5.2">5.2</a><br>generate
<ul>
<p>where used <a href="./1076_9.HTM#9.7">9.7</a>
</ul>
<p>instantiation
<ul>
<p>where used <a href="./1076_5.HTM#5.2">5.2</a>, <a href="./1076_9.HTM#9.6">9.6</a>
</ul>
<p>loop
<ul>
<p>where declared <a href="./1076_8.HTM#8.9">8.9</a><br>where used <a href="./1076_8.HTM#8.10">8.10</a>, <a href="./1076_8.HTM#8.11">8.11</a>, <a href="./1076_8.HTM#8.12">8.12</a>
</ul>
<p>of concurrent statements <a href="./1076_9.HTM#9.1">9.1</a><br>process
<ul>
<p>where used <a href="./1076_9.HTM#9.2">9.2</a>
</ul>
<p>syntax <a href="./1076_9.HTM#9.7">9.7</a><br>where used <a href="./1076_8.HTM#8.1">8.1</a>, <a href="./1076_8.HTM#8.2">8.2</a>, <a href="./1076_8.HTM#8.3">8.3</a>, <a href="./1076_8.HTM#8.4">8.4</a>, <a href="./1076_8.HTM#8.5">8.5</a>, <a href="./1076_8.HTM#8.6">8.6</a>, <a href="./1076_8.HTM#8.7">8.7</a>, <a href="./1076_8.HTM#8.12">8.12</a>, <a href="./1076_9.HTM#9.3">9.3</a>, <a href="./1076_9.HTM#9.5">9.5</a>
</ul>
<p>LAST_ACTIVE attribute <a href="./1076_4.HTM#4.3.2">4.3.2</a>, <a href="./1076_7.HTM#7.4.1">7.4.1</a>, <a href="./1076_7.HTM#7.4.2">7.4.2</a>, <a href="./1076_14.HTM#S'LAST_ACTIVE">14.1:S</a>, <a href="./1076_14.HTM#14.1:NOTES">14.1:notes</a><br>LAST_EVENT attribute <code><a href="./1076_4.HTM#4.3.2">4.3.2</a></code>, <a href="./1076_7.HTM#7.4.1">7.4.1</a>, <a href="./1076_7.HTM#7.4.2">7.4.2</a>, <a href="./1076_14.HTM#S'LAST_EVENT">14.1:S</a>, <code><a href="./1076_14.HTM#14.1:NOTES">14.1:notes</a><br></code>LAST_VALUE attribute <code><a href="./1076_4.HTM#4.3.2">4.3.2</a></code>, <a href="./1076_7.HTM#7.4.1">7.4.1</a>, <a href="./1076_7.HTM#7.4.2">7.4.2</a>, <a href="./1076_14.HTM#S'LAST_VALUE">14.1:S</a>, <code><a href="./1076_14.HTM#14.1:NOTES">14.1:notes</a><br></code>LEFT attribute <a href="./1076_14.HTM#T'LEFT">14.1:T</a>, <a href="./1076_14.HTM#A'LEFT">14.1:A</a>, <code><a href="./1076_14.HTM#14.1:NOTES">14.1:notes</a><br></code>LEFTOF attribute <a href="./1076_14.HTM#T'LEFTOF">14.1:T</a><br>LENGTH attribute <a href="./1076_14.HTM#A'LENGTH">14,1:A</a><br>Letters
<ul>
<p>lower case <a href="./1076_0.HTM#0.2.1">0.2.1</a>
<ul>
<p>syntax <a href="./1076_13.HTM#13.1">13.1</a><br>where used <a href="./1076_13.HTM#13.3.1">13.3.1</a>, <a href="./1076_13.HTM#13.4.1">13.4.1</a>
</ul>
<p>upper case <a href="./1076_0.HTM#0.2.2">0.2.2</a>
<ul>
<p>syntax <a href="./1076_13.HTM#13.1">13.1</a><br>where used <a href="./1076_13.HTM#13.1">13.1</a>, <a href="./1076_13.HTM#13.3.1">13.3.1</a>, <a href="./1076_13.HTM#13.4.1">13.4.1</a>
</ul>