push and pop

src/arch/x86_64/encode.rs

@@ -115,6 +115,20 @@ impl Encoder {
         self.data.push(0xc3);
     }
 
+    pub fn push(&mut self, reg: Reg) {
+        if reg.gt8() {
+            self.data.push(0x41);
+        }
+        self.data.push(0x50 | reg.base());
+    }
+
+    pub fn pop(&mut self, reg: Reg) {
+        if reg.gt8() {
+            self.data.push(0x41);
+        }
+        self.data.push(0x58 | reg.base());
+    }
+
     /// inserts a 32 bit offset from a symbol
     pub fn sym_offset4(&mut self, sym: Symbol) {
         let Some(addr) = self.sym_tab.get(sym) else {
@@ -129,11 +143,13 @@ impl Encoder {
     pub fn asm(&mut self, instr: Instr) -> Result<(), CompilerMsg> {
         match instr {
             Instr::Mov { dst, src } => self.mov(dst, src)?,
-            Instr::Int { code } => self.int(code),
+            Instr::Int(code) => self.int(code),
             Instr::Syscall => self.syscall(),
             Instr::Lea { dst, sym } => self.lea(dst, sym),
             Instr::Call(sym) => self.call(sym),
             Instr::Ret => self.ret(),
+            Instr::Push(reg) => self.push(reg),
+            Instr::Pop(reg) => self.pop(reg),
         }
         Ok(())
     }