perf(ext/ffi): Fast UnsafePointerView read functions (denoland#16351)

This PR makes pointer read methods of `Deno.UnsafePointerView` Fast API
compliant, with the exception of `getCString` which cannot be made fast
with current V8 Fast API.

cli/tests/testdata/run/ffi/unstable_ffi_10.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_i16(0n);
+Deno.core.ops.op_ffi_read_i16(0n, 0);

cli/tests/testdata/run/ffi/unstable_ffi_11.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_u32(0n);
+Deno.core.ops.op_ffi_read_u32(0n, 0);

cli/tests/testdata/run/ffi/unstable_ffi_12.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_i32(0n);
+Deno.core.ops.op_ffi_read_i32(0n, 0);

cli/tests/testdata/run/ffi/unstable_ffi_13.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_u64(0n);
+Deno.core.ops.op_ffi_read_u64(0n, 0, new Uint32Array(2));

cli/tests/testdata/run/ffi/unstable_ffi_14.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_f32(0n);
+Deno.core.ops.op_ffi_read_f32(0n, 0);

cli/tests/testdata/run/ffi/unstable_ffi_15.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_f64(0n);
+Deno.core.ops.op_ffi_read_f64(0n, 0);

cli/tests/testdata/run/ffi/unstable_ffi_5.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_buf_copy_into(0n, new Uint8Array(0), 0);
+Deno.core.ops.op_ffi_buf_copy_into(0n, 0, new Uint8Array(0), 0);

cli/tests/testdata/run/ffi/unstable_ffi_6.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_cstr_read(0n);
+Deno.core.ops.op_ffi_cstr_read(0n, 0);

cli/tests/testdata/run/ffi/unstable_ffi_7.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_u8(0n);
+Deno.core.ops.op_ffi_read_u8(0n, 0);

cli/tests/testdata/run/ffi/unstable_ffi_8.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_i8(0n);
+Deno.core.ops.op_ffi_read_i8(0n, 0);

cli/tests/testdata/run/ffi/unstable_ffi_9.js

@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_u16(0n);
+Deno.core.ops.op_ffi_read_u16(0n, 0);

ext/ffi/00_ffi.js

@@ -6,7 +6,6 @@
  const ops = core.ops;
  const __bootstrap = window.__bootstrap;
  const {
- BigInt,
  ObjectDefineProperty,
  ArrayPrototypeMap,
  Number,
@@ -17,9 +16,13 @@
  Int32Array,
  Uint32Array,
  BigInt64Array,
+ BigUint64Array,
  Function,
  } = window.__bootstrap.primordials;
 
+ const U32_BUFFER = new Uint32Array(2);
+ const U64_BUFFER = new BigUint64Array(U32_BUFFER.buffer);
+ const I64_BUFFER = new BigInt64Array(U32_BUFFER.buffer);
  class UnsafePointerView {
  pointer;
 
@@ -29,107 +32,128 @@
 
  getBool(offset = 0) {
  return ops.op_ffi_read_bool(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  getUint8(offset = 0) {
  return ops.op_ffi_read_u8(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  getInt8(offset = 0) {
  return ops.op_ffi_read_i8(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  getUint16(offset = 0) {
  return ops.op_ffi_read_u16(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  getInt16(offset = 0) {
  return ops.op_ffi_read_i16(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  getUint32(offset = 0) {
  return ops.op_ffi_read_u32(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  getInt32(offset = 0) {
  return ops.op_ffi_read_i32(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  getBigUint64(offset = 0) {
- return ops.op_ffi_read_u64(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ ops.op_ffi_read_u64(
+ this.pointer,
+ offset,
+ U32_BUFFER,
  );
+ return U64_BUFFER[0];
  }
 
  getBigInt64(offset = 0) {
- return ops.op_ffi_read_i64(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ ops.op_ffi_read_i64(
+ this.pointer,
+ offset,
+ U32_BUFFER,
  );
+ return I64_BUFFER[0];
  }
 
  getFloat32(offset = 0) {
  return ops.op_ffi_read_f32(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  getFloat64(offset = 0) {
  return ops.op_ffi_read_f64(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  getCString(offset = 0) {
  return ops.op_ffi_cstr_read(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  );
  }
 
  static getCString(pointer, offset = 0) {
  return ops.op_ffi_cstr_read(
- offset ? BigInt(pointer) + BigInt(offset) : pointer,
+ pointer,
+ offset,
  );
  }
 
  getArrayBuffer(byteLength, offset = 0) {
  return ops.op_ffi_get_buf(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  byteLength,
  );
  }
 
  static getArrayBuffer(pointer, byteLength, offset = 0) {
  return ops.op_ffi_get_buf(
- offset ? BigInt(pointer) + BigInt(offset) : pointer,
+ pointer,
+ offset,
  byteLength,
  );
  }
 
  copyInto(destination, offset = 0) {
  ops.op_ffi_buf_copy_into(
- offset ? BigInt(this.pointer) + BigInt(offset) : this.pointer,
+ this.pointer,
+ offset,
  destination,
  destination.byteLength,
  );
  }
 
  static copyInto(pointer, destination, offset = 0) {
  ops.op_ffi_buf_copy_into(
- offset ? BigInt(pointer) + BigInt(offset) : pointer,
+ pointer,
+ offset,
  destination,
  destination.byteLength,
  );