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8    <title>ifc - Start if block by condition</title>
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10  <body>
11    <h1>ifc - Start if block by condition</h1>
12
13    <h2>Calling Format</h2>
14    <div class="section">
15      <pre class="definition">
16ifc     status0, status1, mode
17</pre>
18    </div>
19
20    <h2>Operands</h2>
21    <div class="section">
22      <table class="arguments">
23        <thead>
24          <tr>
25            <th>Name</th>
26            <td>Description</td>
27          </tr>
28        </thead>
29        <tr>
30          <th>status0</th>
31          <td>
32            Value of status register 0 (the value is either 0 or 1).<br>
33          </td>
34        </tr>
35        <tr>
36          <th>status1</th>
37          <td>
38            Value of status register 1 (the value is either 0 or 1).<br>
39          </td>
40        </tr>
41        <tr>
42          <th>mode</th>
43          <td>
44            Conditional mode (0: OR, 1: AND, 2: Only status register 0, 3: Only status register 1)<br>
45          </td>
46        </tr>
47      </table>
48    </div>
49
50    <h2>Overview</h2>
51    <div class="section">
52      <p>
53        Runs conditional processing based on the status register values.<br> The value specified by <SPAN class="argument">status0</SPAN> (or <SPAN class="argument">status1</SPAN>) is tested for equality against the value of status register 0 (or 1). When <SPAN class="argument">mode</SPAN> is 0, the result is true when either status register 0 or status register 1 matches its respective operand.<br> When <SPAN class="argument">mode</SPAN> is 1, both status registers must match their respective operands.<br> When <SPAN class="argument">mode</SPAN> is 2, status register 0 must match <SPAN class="argument">status0</SPAN>.<br> When <SPAN class="argument">mode</SPAN> is 3, status register 1 must match <SPAN class="argument">status1</SPAN>.<br> When the condition is <CODE>true</CODE>, the instructions between <CODE>ifc</CODE> and <CODE>endif</CODE> are executed. If there is an <CODE>else</CODE> instruction between <CODE>ifc</CODE> and <CODE>endif</CODE>, the instructions between <CODE>ifc</CODE> and <CODE>else</CODE> are executed.<br> When the condition is <CODE>false</CODE>, the instructions between <CODE>ifc</CODE> and <CODE>endif</CODE> are skipped and control moves to the instruction immediately after <CODE>endif</CODE>. If there is an <CODE>else</CODE> instruction between <CODE>ifc</CODE> and <CODE>endif</CODE>, the instructions between <CODE>else</CODE> and <CODE>endif</CODE> are executed.<br> This instruction must be followed by an <CODE>endif</CODE> instruction.<br>
54      </p>
55      <p class="notice">
56        You can nest a combined total of up to eight <CODE>ifb</CODE> and <CODE>ifc</CODE> instructions.<br>
57      </p>
58      <p class="warning">
59        At least one instruction must be inserted between <CODE>ifc</CODE> and <CODE>endif</CODE> as well as between <CODE>ifc</CODE> and <CODE>else</CODE>.<br>
60      </p>
61    </div>
62
63    <h2>Operation</h2>
64    <div class="section">
65<pre class="definition">
66switch ( mode )
67{
68    case 0 :
69        if ( status0 == Status_register0 || status1 == Status_register1 )
70            condition = true
71        break;
72    case 1 :
73        if ( status0 == Status_register0 && status1 == Status_register1 )
74            condition = true
75        break;
76    case 2 :
77        if ( status0 == Status_register0 )
78            condition = true
79        break;
80    case 3 :
81        if ( status1 == Status_register1 )
82            condition = true
83        break;
84}
85if ( condition == true )
86{
87    ...
88}
89</pre>
90    </div>
91
92    <h2>Code Example</h2>
93    <div class="section">
94<pre class="definition">
95ifc     1, 1, 0    // Executes the instructions between ifc and else when status register 0 or status register 1 is equal to 1
96    ...
97else
98    ...
99endif
100..
101</pre>
102    </div>
103
104
105  <h2>Revision History</h2>
106  <div class="section">
107    <dl class="history">
108      <dt>2011/12/20</dt>
109      <dd>Initial version.<br />
110      </dd>
111    </dl>
112  </div>
113
114  <hr><p>CONFIDENTIAL</p></body>
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