imad (sm4 - asm)
Signed integer multiply and add.
| imad dest[.mask], [-]src0[.swizzle], [-]src1[.swizzle], [-]src2[.swizzle] |
|---|
| Item | Description |
|---|---|
| dest |
[in] The result of the operation. |
| src0 |
[in] Value to multiply with src1. |
| src1 |
[in] Value to multiply with src0. |
| src2 |
[in] Value to add to the product of src0 and src1. |
Remarks
Component-wise imul of 32-bit operands src0 and src1 (signed), keeping low 32-bits (per component) of the result, followed by an iadd of src2, producing the correct low 32-bit (per component) result. The 32-bit results are placed in dest.
Optional negate modifier on source operands takes 2's complement before performing arithmetic operation.
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 |