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+

//! Add example.
+//!
+//! 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.
+
+#[cfg(not(any(target_arch = "x86_64", target_os = "linux")))]
+compile_error!("Only supported on x86_64 with SystemV abi");
+
+use juicebox_asm::prelude::*;
+use juicebox_asm::Runtime;
+use Reg64::*;
+
+extern "C" fn add(a: u32, b: u32) -> u32 {
+    a + b
+}
+
+fn main() {
+    let mut asm = Asm::new();
+
+    // SystemV abi:
+    //   rdi -> first argument
+    //   rsi -> second argument
+    //   rax -> return value
+    //
+    asm.mov(rsi, Imm64::from(42));
+    asm.mov(rax, Imm64::from(add as u64));
+    asm.call(rax);
+    asm.ret();
+
+    let code = asm.into_code();
+    std::fs::write("jit.asm", &code).unwrap();
+
+    let mut rt = Runtime::new();
+    let add42 = unsafe { rt.add_code::<extern "C" fn(u32) -> u32>(code) };
+
+    let res = add42(5);
+    assert_eq!(res, 47);
+}
+