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Block Floating Point
In block floating point formats several floating point numbers may share an exponent, but have different mantissae.
A modern example of this is DirectX 10's RGBE format: a 5-bit shared exponent across all colors with 9 bits of mantissa for each component. Used in high dynamic range (HDR) computer graphics, textures.
Distinguish between block floating point formats and instructions that operate on such data directly.