VM Data Types, Accuracy Modes, and Performance Tips
- Use VM for vector lengths larger than 40 elements.
- Use the Intel® Compiler for vector lengths less than 40 elements.
- High Accuracy (HA), the default mode
- Low Accuracy (LA), which improves performance by reducing accuracy of the two least significant bits
- Enhanced Performance (EP), which provides better performance at the cost of significantly reduced accuracy. Approximately half of the bits in the mantissa are correct.