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.
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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::insn::*;
-use juicebox_asm::{Asm, Imm8, Reg64::*, Runtime};
-use juicebox_asm::{Mem16, Mem32, Mem64, Mem8};
-
-extern "C" fn add(a: u32, b: u32) -> u32 {
- a + b
-}
-
-fn main() {
- let mut asm1 = Asm::new();
- //asm1.add(Mem16::indirect(rdi), Imm8::from(0x80u8));
- asm1.test(rax, rax);
- asm1.cmp(Mem8::indirect(rax), Imm8::from(0u8));
- asm1.ret();
-
- let code = asm1.into_code();
- std::fs::write("jit.asm", &code).unwrap();
-
- let mut asm2 = Asm::new();
- //asm2.mov(Reg16::cx, Imm16::from(1u16));
- //asm2.mov(Mem::Indirect(rdi), Reg16::cx);
- asm2.ret();
-
- let mut rt = Runtime::new();
- let fn1 = unsafe { rt.add_code::<extern "C" fn(*mut u64)>(code) };
- let fn2 = unsafe { rt.add_code::<extern "C" fn(*mut u64)>(asm2.into_code()) };
-
- let mut data = 0xffff_ffff_ffff_ff80u64;
- fn1(&mut data as *mut u64);
- println!("data={:x}", data);
-
- let mut data = 0xffff_ffff_ffff_ffffu64;
- fn2(&mut data as *mut u64);
- println!("data={:x}", data);
-}
-