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perf: 算术运算 int 结果保 int + double 快路径

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彭俊皓
2026-08-13 14:44:24 +08:00
parent fbd9e6db51
commit 033ef9abea
1 changed files with 67 additions and 5 deletions
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crates/oxide_vm/src/dispatch/arithmetic.rs
+67 -5
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@@ -8,6 +8,33 @@ fn bigint_is_zero(v: &num_bigint::BigInt) -> bool {
num_traits::Zero::is_zero(v)
}
/// int+int 加法：结果落在 i32 范围则保 int，否则升 double。
#[inline(always)]
fn int_add(a: i32, b: i32) -> JsValue {
match a.checked_add(b) {
Some(v) => JsValue::int(v),
None => JsValue::float(a as f64 + b as f64),
}
}
/// int+int 减法：结果落在 i32 范围则保 int，否则升 double。
#[inline(always)]
fn int_sub(a: i32, b: i32) -> JsValue {
match a.checked_sub(b) {
Some(v) => JsValue::int(v),
None => JsValue::float(a as f64 - b as f64),
}
}
/// int+int 乘法：结果落在 i32 范围则保 int，否则升 double。
#[inline(always)]
fn int_mul(a: i32, b: i32) -> JsValue {
match a.checked_mul(b) {
Some(v) => JsValue::int(v),
None => JsValue::float(a as f64 * b as f64),
}
}
impl Vm {
#[inline(always)]
pub(crate) fn dispatch_add(&mut self, rd: usize, a: usize, b: usize) -> Result<(), String> {
@@ -15,7 +42,11 @@ impl Vm {
let lv = self.regs[a];
let rv = self.regs[b];
if lv.is_int() && rv.is_int() {
self.regs[rd] = JsValue::float(lv.as_int() as f64 + rv.as_int() as f64);
self.regs[rd] = int_add(lv.as_int(), rv.as_int());
return Ok(());
}
if lv.is_double() && rv.is_double() {
self.regs[rd] = JsValue::float(lv.as_double() + rv.as_double());
return Ok(());
}
if lv.is_bigint() && rv.is_bigint() {
@@ -97,7 +128,11 @@ impl Vm {
let lv = self.regs[rd];
let rv = self.regs[a];
if lv.is_int() && rv.is_int() {
self.regs[rd] = JsValue::float(lv.as_int() as f64 + rv.as_int() as f64);
self.regs[rd] = int_add(lv.as_int(), rv.as_int());
return Ok(());
}
if lv.is_double() && rv.is_double() {
self.regs[rd] = JsValue::float(lv.as_double() + rv.as_double());
return Ok(());
}
if lv.is_bigint() && rv.is_bigint() {
@@ -131,7 +166,11 @@ impl Vm {
let lv = self.regs[rd];
let rv = self.regs[a];
if lv.is_int() && rv.is_int() {
self.regs[rd] = JsValue::float(lv.as_int() as f64 - rv.as_int() as f64);
self.regs[rd] = int_sub(lv.as_int(), rv.as_int());
return Ok(());
}
if lv.is_double() && rv.is_double() {
self.regs[rd] = JsValue::float(lv.as_double() - rv.as_double());
return Ok(());
}
if lv.is_bigint() && rv.is_bigint() {
@@ -159,7 +198,11 @@ impl Vm {
let lv = self.regs[rd];
let rv = self.regs[a];
if lv.is_int() && rv.is_int() {
self.regs[rd] = JsValue::float(lv.as_int() as f64 * rv.as_int() as f64);
self.regs[rd] = int_mul(lv.as_int(), rv.as_int());
return Ok(());
}
if lv.is_double() && rv.is_double() {
self.regs[rd] = JsValue::float(lv.as_double() * rv.as_double());
return Ok(());
}
if lv.is_bigint() && rv.is_bigint() {
@@ -190,6 +233,10 @@ impl Vm {
self.regs[rd] = JsValue::float(lv.as_int() as f64 / rv.as_int() as f64);
return Ok(());
}
if lv.is_double() && rv.is_double() {
self.regs[rd] = JsValue::float(lv.as_double() / rv.as_double());
return Ok(());
}
if lv.is_bigint() && rv.is_bigint() {
let r = self.bigint_value(rv);
if bigint_is_zero(r) {
@@ -223,7 +270,22 @@ impl Vm {
let lv = self.regs[rd];
let rv = self.regs[a];
if lv.is_int() && rv.is_int() {
self.regs[rd] = JsValue::float(lv.as_int() as f64 % rv.as_int() as f64);
let a = lv.as_int();
let b = rv.as_int();
if b != 0 {
match a.checked_rem(b) {
Some(v) => {
self.regs[rd] = JsValue::int(v);
return Ok(());
}
None => {}
}
}
self.regs[rd] = JsValue::float(a as f64 % b as f64);
return Ok(());
}
if lv.is_double() && rv.is_double() {
self.regs[rd] = JsValue::float(lv.as_double() % rv.as_double());
return Ok(());
}
if lv.is_bigint() && rv.is_bigint() {