Add instruction format types
diff --git a/index.html b/index.html
index 4f8a689..33812cb 100644
--- a/index.html
+++ b/index.html
@@ -1,17 +1,46 @@
<!DOCTYPE html>
+<title>Searchable RISC-V instruction set reference</title>
+
<div class="wrapper">
<input type="text" id="searchbox" placeholder="Search RISC-V Instructions"></input>
</div>
+<details>
+ <summary>Instruction format types</summary>
+
+ <ul>
+ <li>R - registers, <code>op rd, rs1, rs2</code>. 3 opcode
+ parts, <code>opcode, funct7, funct3</code></li>
+
+ <li>I - immediate, <code>op rd, rs1, imm[12]</code>. 2 opcode
+ parts, <code>opcode, funct3</code>. Except on ECALL when
+ it uses the immediate section for an opcode, called
+ funct12</li>
+
+ <li>S - store, <code>op, rs1, rs2+imm[12]</code>. 2 opcode
+ parts, <code>opcode</code> and <code>funct3</code>.</li>
+
+ <li>B - Variant of S type, probably means "branch". 2 opcode
+ parts, <code>opcode</code> and <code>funct3</code>.</li>
+
+ <li>U - upper load, <code>op rd, imm[20]</code>. 1 opcode
+ part, <code>opcode</code>.</li>
+
+ <li>J - Variant of J type, jump???. 1 opcode part, <code>opcode</code>.</li>
+
+ <li>pseudo - Pseudo-instruction</li>
+ </ul>
+</details>
+
<div id="ilist">
</div>
<hr>
<p class="cite">
- These listings are generated from documentation written
- by <a href="https://hg.sr.ht/~icefox/riscv-reference">~icefox</a>
+ The listings in this searchable RISC-V instruction set reference
+ are generated from documentation written by <a href="https://hg.sr.ht/~icefox/riscv-reference">~icefox</a>
on sourcehut. Website created by <a href="https://swisschili.sh">swissChili</a>.
</p>
<p class="cite">
@@ -32,13 +61,18 @@
}
dd div,
- #searchbox {
+ #searchbox,
+ code {
background: #fcfaf2;
padding: 4px;
border-radius: 4px;
border: 1px solid #f4f2e8;
}
+ code {
+ padding: 2px;
+ }
+
#searchbox {
font-size: 14pt;
padding: 12px 20px;
@@ -61,6 +95,14 @@
hr {
border-color: #CCC;
}
+
+ details {
+ margin-bottom: 2em;
+ }
+
+ summary {
+ cursor: pointer;
+ }
</style>
<script>