


How to Convert 32-bit Floating-Point Numbers to 16-bit Floating-Point Numbers?
32-bit to 16-bit Floating Point Conversion
Converting 32-bit floating-point numbers to 16-bit floating-point numbers is a common requirement when transmitting data over networks to minimize size. Here's an algorithm for such conversion:
1. Initialization:
-
Define the following constants for 32-bit (float) and 16-bit (flt16) floating-point formats:
- Significand bits (sig_bits): 23 for float, 10 for flt16
- Exponent bits (exp_bits): 8 for float, 5 for flt16
2. Encoding:
-
Convert the 32-bit floating-point number (value) to 16 bits using the encode_flt16() function, which rounds the result:
1
<code
class
=
"cpp"
>uint16_t half_value = encode_flt16(value);</code>
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3. Decoding to 32-bit Floating Point:
-
To convert the 16-bit floating-point number back to 32-bit, use the decode_flt16() function:
1
<code
class
=
"cpp"
>float decoded_value = decode_flt16(half_value);</code>
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4. Considerations:
- The conversion introduces some rounding error due to the reduction in precision from 23 to 10 significand bits.
- This conversion is suitable for cases where reduced precision is acceptable while minimizing data size for transmission.
- If higher precision is required, consider using a different data format or compression technique.
The above is the detailed content of How to Convert 32-bit Floating-Point Numbers to 16-bit Floating-Point Numbers?. For more information, please follow other related articles on the PHP Chinese website!

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