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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/lib.rs`."><title>lib.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-b0742ba02757f159.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="juicebox_asm" data-themes="" data-resource-suffix="" data-rustdoc-version="1.83.0 (90b35a623 2024-11-26)" data-channel="1.83.0" data-search-js="search-f0d225181b97f9a4.js" data-settings-js="settings-805db61a62df4bd2.js" ><script src="../../static.files/storage-1d39b6787ed640ff.js"></script><script defer src="../../static.files/src-script-e66d777a5a92e9b2.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-f070b9041d14864c.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-0111fcff984fae8f.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer"></div><main><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">juicebox_asm/</div>lib.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap"><div data-nosnippet><pre class="src-line-numbers">
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//!
//! The following is an fibonacci example implementation.
//! ```rust
//! use juicebox_asm::{Asm, Reg64, Imm64, Label};
//! use juicebox_asm::insn::*;
//! use juicebox_asm::Runtime;
//!
//! const fn fib_rs(n: u64) -> u64 {
//! match n {
//! 0 => 0,
//! 1 => 1,
//! _ => fib_rs(n - 2) + fib_rs(n - 1),
//! }
//! }
//!
//! fn main() {
//! let mut asm = Asm::new();
//!
//! let mut lp = Label::new();
//! let mut end = Label::new();
//!
//! // Reference implementation:
//! //
//! // int fib(int n) {
//! // int tmp = 0;
//! // int prv = 1;
//! // int sum = 0;
//! // loop:
//! // if (n == 0) goto end;
//! // tmp = sum;
//! // sum += prv;
//! // prv = tmp;
//! // --n;
//! // goto loop;
//! // end:
//! // return sum;
//! // }
//!
//! // SystemV abi:
//! // rdi -> first argument
//! // rax -> return value
//! let n = Reg64::rdi;
//! let sum = Reg64::rax;
//!
//! let tmp = Reg64::rcx;
//! let prv = Reg64::rbx;
//!
//! asm.mov(tmp, Imm64::from(0));
//! asm.mov(prv, Imm64::from(1));
//! asm.mov(sum, Imm64::from(0));
//!
//! asm.bind(&mut lp);
//! asm.test(n, n);
//! asm.jz(&mut end);
//! asm.mov(tmp, sum);
//! asm.add(sum, prv);
//! asm.mov(prv, tmp);
//! asm.dec(n);
//! asm.jmp(&mut lp);
//! asm.bind(&mut end);
//! asm.ret();
//!
//! // Move code into executable page and get function pointer to it.
//! let mut rt = Runtime::new();
//! let fib = unsafe { rt.add_code::<extern "C" fn(u64) -> u64>(&asm.into_code()) };
//!
//! for n in 0..15 {
//! let fib_jit = fib(n);
//! println!("fib({}) = {}", n, fib_jit);
//! assert_eq!(fib_jit, fib_rs(n));
//! }
//! }
//! ```
</span><span class="kw">mod </span>asm;
<span class="kw">mod </span>disasm;
<span class="kw">mod </span>imm;
<span class="kw">mod </span>label;
<span class="kw">mod </span>mem;
<span class="kw">mod </span>reg;
<span class="kw">mod </span>rt;
<span class="kw">pub mod </span>insn;
<span class="kw">pub use </span>asm::Asm;
<span class="kw">pub use </span>imm::{Imm16, Imm32, Imm64, Imm8};
<span class="kw">pub use </span>label::Label;
<span class="kw">pub use </span>mem::{Mem16, Mem32, Mem64, Mem8};
<span class="kw">pub use </span>reg::{Reg16, Reg32, Reg64, Reg8};
<span class="kw">pub use </span>rt::Runtime;
</code></pre></div></section></main></body></html>
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