impr: Move to the newly baseline (set/get)Float16

packages/typed-binary/src/io/bufferReader.ts

@@ -1,5 +1,4 @@
 import { BufferIOBase } from './bufferIOBase.ts';
-import { float16ToNumber } from './float16converter.ts';
 import type { ISerialInput } from './types.ts';
 import { unwrapBuffer } from './unwrapBuffer.ts';
 
@@ -54,9 +53,9 @@ export class BufferReader extends BufferIOBase implements ISerialInput {
   }
 
   readFloat16(): number {
-    const value = this.dataView.getUint16(this.byteOffset, this.littleEndian);
+    const value = this.dataView.getFloat16(this.byteOffset, this.littleEndian);
     this.byteOffset += 2;
-    return float16ToNumber(value);
+    return value;
   }
 
   readFloat32(): number {

packages/typed-binary/src/io/bufferWriter.ts

@@ -1,5 +1,4 @@
 import { BufferIOBase } from './bufferIOBase.ts';
-import { numberToFloat16 } from './float16converter.ts';
 import type { ISerialOutput } from './types.ts';
 import { unwrapBuffer } from './unwrapBuffer.ts';
 
@@ -50,11 +49,7 @@
   }
 
   writeFloat16(value: number): void {
-    this.dataView.setUint16(
-      this.byteOffset,
-      numberToFloat16(value),
-      this.littleEndian,
-    );
+    this.dataView.setFloat16(this.byteOffset, value, this.littleEndian);
     this.byteOffset += 2;
   }
 

packages/typed-binary/src/test/float.test.ts

@@ -54,7 +54,7 @@ describe('Float16Schema', () => {
   });
 
   it('should encode and decode a f16 value', () => {
-    const value1 = 5472.5; // precision should be 4
+    const value1 = 5474; // precision should be 4
     const value2 = 145; // precision should be 2^-2
     const value3 = 0.34; // precision should be 2^-12
     const value4 = 21877.5; // precision should be 16
@@ -64,6 +64,8 @@ describe('Float16Schema', () => {
     const decoded3 = encodeAndDecode(f16, value3);
     const decoded4 = encodeAndDecode(f16, value4);
 
+    // Nearest two representible numbers to 5474 are 5472 and 5476
+    expect(Math.abs(decoded1 - value1)).toEqual(2);
     expect(decoded1).to.closeTo(value1, 4);
     expect(decoded2).to.closeTo(value2, 0.25);
     expect(decoded3).to.closeTo(value3, 0.000976);