START OF COMPILER

src/compiler/riscv64/mod.rs

@@ -0,0 +1,33 @@
+use crate::compiler::program::Instr;
+mod elf;
+mod instruction;
+mod asm;
+
+use instruction::*;
+
+pub fn gen() -> Vec<u8> {
+    let mut program = Vec::new();
+    let msg = b"Hello world!\n";
+    program.extend(msg);
+    program.resize(((program.len() - 1) / 4 + 1) * 4, 0);
+    let start = program.len() as u64;
+    let instructions = [
+        auipc(t0, 0),
+        addi(t0, t0, -(start as i32)),
+        addi(a0, zero, 1),
+        mv(a1, t0),
+        addi(a2, zero, msg.len() as i32),
+        addi(a7, zero, 64),
+        addi(t0, zero, 200),
+        ecall(),
+        // exit
+        addi(a0, zero, 0),
+        addi(a7, zero, 93),
+        ecall(),
+        j(0),
+    ];
+    for i in instructions {
+        program.extend(i.to_le_bytes());
+    }
+    elf::create(program, start)
+}