ftoi (sm4 - asm)
Floating point to signed integer conversion.
ftoi dest[.mask], [-]src0[_abs][.swizzle] |
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Item | Description |
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dest |
[in] The address of the result of the operation. dest = round_z(src0) |
src0 |
[in] The component to convert. |
Remarks
The conversion is performed per component. Rounding is always performed towards zero, following the C convention for casts from float to int. Applications that require different rounding semantics can invoke the round instructions before casting to integer.
Inputs are clamped to the range [-2147483648.999f ... 2147483647.999f] prior to conversion, and input NaN values produce a zero result.
Optional negate and absolute value modifiers are applied to the source values before conversion.
This instruction applies to the following shader stages:
Vertex Shader | Geometry Shader | Pixel Shader |
---|---|---|
x | x | x |
Minimum Shader Model
This function is supported in the following shader models.
Shader Model | Supported |
---|---|
Shader Model 5 | yes |
Shader Model 4.1 | yes |
Shader Model 4 | yes |
Shader Model 3 (DirectX HLSL) | no |
Shader Model 2 (DirectX HLSL) | no |
Shader Model 1 (DirectX HLSL) | no |