Update index.js

index.js

@@ -45,20 +45,62 @@ async function initializeSessions() {
   status.textContent = 'Ready';
 }
 
-// UI Event Handlers
-example.addEventListener('click', (e) => {
-  e.preventDefault();
-  parse(EXAMPLE_URL, 'Describe this image.');
-});
+export function int64ToFloat16(int64Value) {
+  // Convert BigInt to Number (float64)
+  const float64Value = Number(int64Value);
+
+  // Handle special cases
+  if (!isFinite(float64Value)) return float64Value > 0 ? 0x7c00 : 0xfc00; // +/- infinity
+  if (float64Value === 0) return 0; // Zero is represented as 0
+
+  // Get sign, exponent, and mantissa from float64
+  const sign = float64Value < 0 ? 1 : 0;
+  const absValue = Math.abs(float64Value);
+  const exponent = Math.floor(Math.log2(absValue));
+  const mantissa = absValue / Math.pow(2, exponent) - 1;
+
+  // Convert exponent and mantissa to float16 format
+  const float16Exponent = exponent + 15; // Offset exponent by 15 (float16 bias)
+  const float16Mantissa = Math.round(mantissa * 1024); // 10-bit mantissa for float16
+
+  // Handle overflow/underflow
+  if (float16Exponent <= 0) {
+    // Subnormal numbers (exponent <= 0)
+    return (sign << 15) | (float16Mantissa >> 1);
+  } else if (float16Exponent >= 31) {
+    // Overflow, set to infinity
+    return (sign << 15) | 0x7c00;
+  } else {
+    // Normalized numbers
+    return (sign << 15) | (float16Exponent << 10) | (float16Mantissa & 0x3ff);
+  }
+}
 
-fileUpload.addEventListener('change', function(e) {
-  const file = e.target.files[0];
-  if (!file) return;
+export function float16ToInt64(float16Value: number): bigint {
+  // Extract components from float16
+  const sign = (float16Value & 0x8000) >> 15;
+  const exponent = (float16Value & 0x7c00) >> 10;
+  const mantissa = float16Value & 0x03ff;
+
+  // Handle special cases
+  if (exponent === 0 && mantissa === 0) return BigInt(0); // Zero
+  if (exponent === 0x1f) return sign ? BigInt("-Infinity") : BigInt("Infinity"); // Infinity
+
+  // Convert back to number
+  let value;
+  if (exponent === 0) {
+    // Subnormal numbers
+    value = Math.pow(2, -14) * (mantissa / 1024);
+  } else {
+    // Normalized numbers
+    value = Math.pow(2, exponent - 15) * (1 + mantissa / 1024);
+  }
 
-  const reader = new FileReader();
-  reader.onload = e2 => parse(e2.target.result, '');
-  reader.readAsDataURL(file);
-});
+  // Apply sign
+  value = sign ? -value : value;
+
+  return BigInt(Math.round(value));
+}
 
 async function parse(img, txt) {
   imageContainer.innerHTML = '';
@@ -68,7 +110,6 @@ async function parse(img, txt) {
   status.textContent = output;
 }
 
-
 export async function imageTextToText(
   imagePath,
   query,
@@ -282,4 +323,19 @@ export async function imageTextToText(
   }
 }
 
-await initializeSessions();
+await initializeSessions();
+
+// UI Event Handlers
+example.addEventListener('click', (e) => {
+  e.preventDefault();
+  parse(EXAMPLE_URL, 'Describe this image.');
+});
+
+fileUpload.addEventListener('change', function(e) {
+  const file = e.target.files[0];
+  if (!file) return;
+
+  const reader = new FileReader();
+  reader.onload = e2 => parse(e2.target.result, '');
+  reader.readAsDataURL(file);
+});