<!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 `examples/gen.rs`."><title>gen.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="gen" 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">gen/</div>gen.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap"><div data-nosnippet><pre class="src-line-numbers">
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//!
//! Jit compile a function at runtime (generate native host code) which calls a function defined in
//! the example based on the SystemV abi to demonstrate the [`juicebox_asm`] crate.
</span><span class="attr">#[cfg(not(any(target_arch = <span class="string">"x86_64"</span>, target_os = <span class="string">"linux"</span>)))]
</span><span class="macro">compile_error!</span>(<span class="string">"Only supported on x86_64 with SystemV abi"</span>);
<span class="kw">use </span>juicebox_asm::insn::<span class="kw-2">*</span>;
<span class="kw">use </span>juicebox_asm::{Asm, Imm8, Reg64::<span class="kw-2">*</span>, Runtime};
<span class="kw">use </span>juicebox_asm::{Mem16, Mem32, Mem64, Mem8};
<span class="kw">extern </span><span class="string">"C" </span><span class="kw">fn </span>add(a: u32, b: u32) -> u32 {
a + b
}
<span class="kw">fn </span>main() {
<span class="kw">let </span><span class="kw-2">mut </span>asm1 = Asm::new();
<span class="comment">//asm1.add(Mem16::indirect(rdi), Imm8::from(0x80u8));
</span>asm1.test(rax, rax);
asm1.cmp(Mem8::indirect(rax), Imm8::from(<span class="number">0u8</span>));
asm1.ret();
<span class="kw">let </span>code = asm1.into_code();
std::fs::write(<span class="string">"jit.asm"</span>, <span class="kw-2">&</span>code).unwrap();
<span class="kw">let </span><span class="kw-2">mut </span>asm2 = Asm::new();
<span class="comment">//asm2.mov(Reg16::cx, Imm16::from(1u16));
//asm2.mov(Mem::Indirect(rdi), Reg16::cx);
</span>asm2.ret();
<span class="kw">let </span><span class="kw-2">mut </span>rt = Runtime::new();
<span class="kw">let </span>fn1 = <span class="kw">unsafe </span>{ rt.add_code::<<span class="kw">extern </span><span class="string">"C" </span><span class="kw">fn</span>(<span class="kw-2">*mut </span>u64)>(code) };
<span class="kw">let </span>fn2 = <span class="kw">unsafe </span>{ rt.add_code::<<span class="kw">extern </span><span class="string">"C" </span><span class="kw">fn</span>(<span class="kw-2">*mut </span>u64)>(asm2.into_code()) };
<span class="kw">let </span><span class="kw-2">mut </span>data = <span class="number">0xffff_ffff_ffff_ff80u64</span>;
fn1(<span class="kw-2">&mut </span>data <span class="kw">as </span><span class="kw-2">*mut </span>u64);
<span class="macro">println!</span>(<span class="string">"data={:x}"</span>, data);
<span class="kw">let </span><span class="kw-2">mut </span>data = <span class="number">0xffff_ffff_ffff_ffffu64</span>;
fn2(<span class="kw-2">&mut </span>data <span class="kw">as </span><span class="kw-2">*mut </span>u64);
<span class="macro">println!</span>(<span class="string">"data={:x}"</span>, data);
}
</code></pre></div></section></main></body></html>
