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Is there practical examples of Half-float (FP16) ?

Greetings,

After reading“PHENOMENAL COSMIC POWERS! Itty-bitty living space!” from edplowman, I'm wondering how the FP16 type can actually be used ?

When reading the ARMv7 and ARMv8 architectures manuals, the only instructions that I found to refer to half-precision floating-points are VCVT (ARMv7) or FCVT (ARMv8).

So, my questions are :

Can CPU do anything with half-precision floating points beside converting them ? Can you add/subtract/multiply/divide half-precision floating-points natively ?
How do you use half-precision floating points values efficiently with OpenGL ? Do you do all the operations with single-precision floats and do a conversion before sending the data to the GPU ?
Is there any example showing how to use this data type efficiently ?

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0 Peter Harris over 8 years ago in reply to Myy

See previous answer:

In general for anything related to position (texture coordinates, vertex positions, uniform matrices for position transform, distance computation for lighting, etc) we'd generally recommend using highp/fp32. For anything related to color, or intermediate values which will turn in to a color at some point (such as normals for lighting) then fp16 is probably fine.
=)
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0 Peter Harris over 8 years ago in reply to Myy

See previous answer:

In general for anything related to position (texture coordinates, vertex positions, uniform matrices for position transform, distance computation for lighting, etc) we'd generally recommend using highp/fp32. For anything related to color, or intermediate values which will turn in to a color at some point (such as normals for lighting) then fp16 is probably fine.
=)
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0 Myy over 8 years ago in reply to Peter Harris

Alright then
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