mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-23 18:21:13 +08:00
feat: DataView getFloat16/setFloat16
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@@ -328,6 +328,17 @@ pub fn data_view_get_float32<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult
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NativeResult::Ok(JsValue::float(n as f64))
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}
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/// `DataView.prototype.getFloat16(byteOffset, littleEndian)`：读取 2 字节半精度浮点。
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pub fn data_view_get_float16<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let bytes = native_try!(read_bytes::<2, H>(vm, args));
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let bits = if is_little_endian(vm, args, 2) {
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u16::from_le_bytes(bytes)
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} else {
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u16::from_be_bytes(bytes)
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};
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NativeResult::Ok(JsValue::float(crate::math::f16_bits_to_f64(bits)))
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}
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/// `DataView.prototype.getFloat64(byteOffset, littleEndian)`：读取 8 字节双精度浮点。
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pub fn data_view_get_float64<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let bytes = native_try!(read_bytes::<8, H>(vm, args));
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@@ -437,6 +448,20 @@ pub fn data_view_set_float32<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult
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NativeResult::Ok(JsValue::undefined())
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}
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/// `DataView.prototype.setFloat16(byteOffset, value, littleEndian)`：按 IEEE 754
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/// binary16 舍入写入 2 字节半精度浮点（NaN 规范化由 `f64_to_f16_bits` 处理）。
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pub fn data_view_set_float16<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let value = numeric_arg(vm, args, 2);
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let bits = crate::math::f64_to_f16_bits(value);
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let bytes = if is_little_endian(vm, args, 3) {
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bits.to_le_bytes()
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} else {
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bits.to_be_bytes()
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};
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native_try!(write_bytes(vm, args, bytes));
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NativeResult::Ok(JsValue::undefined())
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}
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/// `DataView.prototype.setFloat64(byteOffset, value, littleEndian)`：写入双精度浮点。
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pub fn data_view_set_float64<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let value = numeric_arg(vm, args, 2);
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@@ -119,7 +119,7 @@ pub fn math_fround<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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/// - 尾数进位溢出到指数后若超出 f16 指数上限 15 → ±Infinity（与规范溢出点一致）
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/// - 输出直接以 f16 的 u16 位模式给出，供 Math.f16round 还原为 f64
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/// 或 DataView setFloat16 写缓冲复用
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fn f64_to_f16_bits(x: f64) -> u16 {
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pub(crate) fn f64_to_f16_bits(x: f64) -> u16 {
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let bits = x.to_bits();
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let sign = ((bits >> 63) & 1) as u16;
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let exp = ((bits >> 52) & 0x7FF) as i32;
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@@ -182,7 +182,7 @@ fn f64_to_f16_bits(x: f64) -> u16 {
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/// IEEE 754 binary16 → f64 精确还原（f16 有效位 ≤ 11 bit，f64 全可精确表示）。
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/// 供 Math.f16round 与 DataView getFloat16 复用。
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fn f16_bits_to_f64(h: u16) -> f64 {
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pub(crate) fn f16_bits_to_f64(h: u16) -> f64 {
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let sign = ((h >> 15) & 1) as f64;
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let exp = ((h >> 10) & 0x1F) as i32;
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let mant = (h & 0x3FF) as f64;
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@@ -32,42 +32,47 @@ pub fn bind_data_view(core: &Arc<KernelCore>, session: &KernelSession, global: &
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(
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"getInt16",
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oxide_builtins::data_view::data_view_get_int16::<crate::vm::Vm> as *const (),
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2,
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1,
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),
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(
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"getUint16",
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oxide_builtins::data_view::data_view_get_uint16::<crate::vm::Vm> as *const (),
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2,
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1,
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),
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(
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"getInt32",
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oxide_builtins::data_view::data_view_get_int32::<crate::vm::Vm> as *const (),
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2,
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1,
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),
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(
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"getUint32",
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oxide_builtins::data_view::data_view_get_uint32::<crate::vm::Vm> as *const (),
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2,
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1,
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),
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(
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"getFloat32",
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oxide_builtins::data_view::data_view_get_float32::<crate::vm::Vm> as *const (),
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2,
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1,
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),
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(
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"getFloat16",
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oxide_builtins::data_view::data_view_get_float16::<crate::vm::Vm> as *const (),
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1,
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),
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(
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"getFloat64",
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oxide_builtins::data_view::data_view_get_float64::<crate::vm::Vm> as *const (),
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2,
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1,
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),
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(
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"getBigInt64",
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oxide_builtins::data_view::data_view_get_big_int64::<crate::vm::Vm> as *const (),
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2,
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1,
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),
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(
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"getBigUint64",
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oxide_builtins::data_view::data_view_get_big_uint64::<crate::vm::Vm> as *const (),
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2,
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1,
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),
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("setInt8", oxide_builtins::data_view::data_view_set_int8::<crate::vm::Vm> as *const (), 2),
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(
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@@ -78,42 +83,47 @@ pub fn bind_data_view(core: &Arc<KernelCore>, session: &KernelSession, global: &
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(
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"setInt16",
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oxide_builtins::data_view::data_view_set_int16::<crate::vm::Vm> as *const (),
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3,
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2,
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),
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(
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"setUint16",
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oxide_builtins::data_view::data_view_set_uint16::<crate::vm::Vm> as *const (),
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3,
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2,
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),
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(
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"setInt32",
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oxide_builtins::data_view::data_view_set_int32::<crate::vm::Vm> as *const (),
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3,
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2,
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),
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(
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"setUint32",
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oxide_builtins::data_view::data_view_set_uint32::<crate::vm::Vm> as *const (),
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3,
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2,
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),
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(
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"setFloat32",
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oxide_builtins::data_view::data_view_set_float32::<crate::vm::Vm> as *const (),
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3,
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2,
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),
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(
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"setFloat16",
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oxide_builtins::data_view::data_view_set_float16::<crate::vm::Vm> as *const (),
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2,
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),
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(
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"setFloat64",
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oxide_builtins::data_view::data_view_set_float64::<crate::vm::Vm> as *const (),
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3,
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2,
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),
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(
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"setBigInt64",
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oxide_builtins::data_view::data_view_set_big_int64::<crate::vm::Vm> as *const (),
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3,
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2,
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),
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(
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"setBigUint64",
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oxide_builtins::data_view::data_view_set_big_uint64::<crate::vm::Vm> as *const (),
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3,
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2,
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),
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(
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"toString",
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