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8    <title>sub - Subtract</title>
9  </head>
10  <body>
11    <h1>sub - Subtract</h1>
12
13    <h2>Calling Format</h2>
14    <div class="section">
15      <pre class="definition">
16sub     dest, src0, src1
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>Registers</td>
27          </tr>
28        </thead>
29        <tr>
30          <th>dest</th>
31          <td>An output register or temporary register.</td>
32        </tr>
33        <tr>
34          <th>src0</th>
35          <td>A temporary register, input register, or floating-point constant register.</td>
36        </tr>
37        <tr>
38          <th>src1</th>
39          <td>A temporary register, input register, or floating-point constant register.</td>
40        </tr>
41      </table>
42      <p class="notice">
43        You cannot specify a floating-point constant register for both <SPAN class="argument">src0</SPAN> and <SPAN class="argument">src1</SPAN>.<br> You cannot specify input registers using different indices for <SPAN class="argument">src0</SPAN> and <SPAN class="argument">src1</SPAN> at the same time.<br>
44      </p>
45    </div>
46
47    <h2>Overview</h2>
48    <div class="section">
49      <p>
50        Stores the difference between <SPAN class="argument">src0</SPAN> and <SPAN class="argument">src1</SPAN> in <SPAN class="argument">dest</SPAN>.<br>
51      </p>
52    </div>
53
54    <h2>Operation</h2>
55    <div class="section">
56<pre class="definition">
57dest.x = src0.x - src1.x
58dest.y = src0.y - src1.y
59dest.z = src0.z - src1.z
60dest.w = src0.w - src1.w
61</pre>
62    </div>
63
64    <h2>Macro Expansion</h2>
65    <div class="section">
66<pre class="definition">
67add     dest, src0, -src1
68</pre>
69    </div>
70
71    <h2>Code Example</h2>
72    <div class="section">
73<pre class="definition">
74sub     r0,    c1,      v2
75sub     o0.xy, r7.yzww, c4.xxyz
76</pre>
77    </div>
78
79    <h2>Time Table</h2>
80    <div class="section">
81      <table class="timetable">
82        <tr>
83          <th></th>
84          <th>1</th><th>2</th><th>3</th><th>4</th>
85        </tr>
86        <tr>
87          <th>add</th>
88          <td class="read">read</td>
89          <td class="ADD">ADD</td>
90          <td class="post">post</td>
91          <td class="write">write</td>
92          <td class="dummy"></td>
93        </tr>
94      </table>
95    </div>
96
97
98  <h2>Revision History</h2>
99  <div class="section">
100    <dl class="history">
101      <dt>2011/12/20</dt>
102      <dd>Initial version.<br />
103      </dd>
104    </dl>
105  </div>
106
107  <hr><p>CONFIDENTIAL</p></body>
108</html>