From a90a5cba08fdf6c0ceb95101c275108a152a3aed Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 12 Jun 2024 07:35:37 +0200
Subject: Merging upstream version 127.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 toolkit/components/ml/content/Utils.sys.mjs | 77 +++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 toolkit/components/ml/content/Utils.sys.mjs

(limited to 'toolkit/components/ml/content/Utils.sys.mjs')

diff --git a/toolkit/components/ml/content/Utils.sys.mjs b/toolkit/components/ml/content/Utils.sys.mjs
new file mode 100644
index 0000000000..b3a25e84d7
--- /dev/null
+++ b/toolkit/components/ml/content/Utils.sys.mjs
@@ -0,0 +1,77 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+/**
+ * Converts an ArrayBuffer to a Blob URL.
+ *
+ * @param {ArrayBuffer} buffer - The ArrayBuffer to convert.
+ * @returns {string} The Blob URL.
+ */
+export function arrayBufferToBlobURL(buffer) {
+  let blob = new Blob([buffer], { type: "application/wasm" });
+  return URL.createObjectURL(blob);
+}
+
+/**
+ * Validate some simple Wasm that uses a SIMD operation.
+ */
+function detectSimdSupport() {
+  return WebAssembly.validate(
+    new Uint8Array(
+      // ```
+      // ;; Detect SIMD support.
+      // ;; Compile by running: wat2wasm --enable-all simd-detect.wat
+      //
+      // (module
+      //   (func (result v128)
+      //     i32.const 0
+      //     i8x16.splat
+      //     i8x16.popcnt
+      //   )
+      // )
+      // ```
+
+      // prettier-ignore
+      [
+        0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x05, 0x01, 0x60, 0x00,
+        0x01, 0x7b, 0x03, 0x02, 0x01, 0x00, 0x0a, 0x0a, 0x01, 0x08, 0x00, 0x41, 0x00,
+        0xfd, 0x0f, 0xfd, 0x62, 0x0b
+      ]
+    )
+  );
+}
+
+let cachedRuntimeWasmFilename = null;
+
+/**
+ * Determines the appropriate WebAssembly (Wasm) filename based on the runtime capabilities of the browser.
+ * This function considers both SIMD and multi-threading support.
+ * It returns a filename that matches the browser's capabilities, ensuring the most optimized version of the Wasm file is used.
+ *
+ * The result is cached to avoid re-computation.
+ *
+ * @param {Window|null} browsingContext - The browsing context to use for feature detection.
+ * @returns {string} The filename of the Wasm file best suited for the current browser's capabilities.
+ */
+export function getRuntimeWasmFilename(browsingContext = null) {
+  if (cachedRuntimeWasmFilename != null) {
+    return cachedRuntimeWasmFilename;
+  }
+
+  // The cross-origin isolation flag is used to determine if we have multi-threading support.
+  const hasMultiThreadSupport = browsingContext
+    ? browsingContext.crossOriginIsolated
+    : false;
+
+  let res;
+  if (detectSimdSupport()) {
+    res = hasMultiThreadSupport
+      ? "ort-wasm-simd-threaded.wasm"
+      : "ort-wasm-simd.wasm";
+  } else {
+    res = hasMultiThreadSupport ? "ort-wasm-threaded.wasm" : "ort-wasm.wasm";
+  }
+  cachedRuntimeWasmFilename = res;
+  return res;
+}
-- 
cgit v1.2.3