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What are the Floating Point Suffixes in HLSL?
In HLSL you have 3 floating point suffixes: f, d, and h. These map to the float, double, and half types respectively. Sadly there’s no literal for min16float, and the h suffix maps back to fp32 (since half is mapped to float internally).
Which is scalar data type does HLSL support?
HLSL supports several scalar data types: 1 bool – true or false. 2 int – 32-bit signed integer. 3 uint – 32-bit unsigned integer. 4 dword – 32-bit unsigned integer. 5 half – 16-bit floating point value. This data type is provided only for language compatibility. 6 float – 32-bit floating point value. 7 double – 64-bit floating point value.
How to get the min16float behavior in HLSL?
When working with HLSL, the way you get this behavior is by using the min16float type and its variants ( min16float2, min16float3x3, etc.) 2. By declaring this type for a variable you’re providing a hint specifying that it’s okay for the driver to store it with less precision, as long as it’s greater than or equal to 16 bits.
What kind of string type does HLSL support?
HLSL also supports a string type, which is an ASCII string. There are no operations or states that accept strings, but effects can query string parameters and annotations.
Why does HLSL asuint of a float return x?
In theory, this code should return x (where x is a whole number) because the bits in x are being converted to float, then back to uint, so the same bits end up being interpreted as a uint again. However, I found that the only case where this function seems to return x is when the bits of x are interpreted as a very large float.
How are per component operations used in HLSL?
This is very different from a multiply which is typically implemented as a dot product which generates a single scalar: A matrix also uses per-component operations in HLSL: The result is a per-component multiply of the two matrices (as opposed to a standard 3×3 matrix multiply).
Are there any exceptions to the ffloating point rule?
There is no support for floating-point exceptions, status bits or traps. Denorms are flushed to sign-preserved zero on input and output of any floating-point mathematical operation. Exceptions are made for any I/O or data movement operation that does not manipulate the data.