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Denorm Mode
Young Kim edited this page Nov 6, 2017
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Starting from Shader Model 6.2, you can provide -denorm command line option to specify behaviors for 32-bit floating point denormal number.
Available values for this option are "preserve", "ftz", and "any". These options will be represented as function attributes in DXIL.
Note that fp16/fp64 need to preserve denorms regardless of this option.
| -denorm <value> | function attribute | behavior |
|---|---|---|
| preserve | "fp32-denorm-mode"="preserve" | denorm input/output should be preserved |
| ftz | "fp32-denorm-mode"="ftz" | denorm input/output should be flushed to zero |
| any | "fp32-denorm-mode"="any" | any behavior is allowed |