refactor: Vm 状态分组、dispatch 拆分为分发表、IC 辅助函数独立成模块

2026-06-25 19:22:16 +08:00
parent 2c8f85d5a9
commit bb3f1cf0e9
16 changed files with 835 additions and 563 deletions
@@ -1,8 +1,41 @@
 use crate::coercion;
 use crate::vm::Vm;
+use oxide_bytecode::opcode::{self, Instr};
 use oxide_types::value::JsValue;

 impl Vm {
+    #[inline(always)]
+    pub(crate) fn dispatch_jmp(&mut self, instr: Instr) {
+        let offset = opcode::offset16(instr) as isize;
+        self.pc = ((self.pc as isize) + offset - 1) as usize;
+    }
+
+    #[inline(always)]
+    pub(crate) fn dispatch_jmp_if_false(&mut self, rd: usize, instr: Instr) {
+        let cond = coercion::to_boolean(self.regs[rd]);
+        if !cond {
+            let offset = opcode::offset16(instr) as isize;
+            self.pc = ((self.pc as isize) + offset - 1) as usize;
+        }
+    }
+
+    #[inline(always)]
+    pub(crate) fn dispatch_jmp_if_true(&mut self, rd: usize, instr: Instr) {
+        let cond = coercion::to_boolean(self.regs[rd]);
+        if cond {
+            let offset = opcode::offset16(instr) as isize;
+            self.pc = ((self.pc as isize) + offset - 1) as usize;
+        }
+    }
+
+    #[inline(always)]
+    pub(crate) fn dispatch_jmp_if_nullish(&mut self, rd: usize, instr: Instr) {
+        if self.regs[rd].is_nullish() {
+            let offset = opcode::offset16(instr) as isize;
+            self.pc = ((self.pc as isize) + offset - 1) as usize;
+        }
+    }
+
    #[inline(always)]
    pub(crate) fn dispatch_and(&mut self, rd: usize, a: usize, b: usize) {
        let val = self.regs[a];