dadd (sm5 - asm)
Component-wise double-precision add.
dadd[_sat] dest[.mask], [-]src0[_abs][.swizzle], [-]src1[_abs][.swizzle] |
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Item | Description |
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dest |
[in] The address of the result of the operation. |
src0 |
[in] The components to add with src1. |
src1 |
[in] The components to add with src0 |
Remarks
The valid swizzles for the source parameters are .xyzw, .xyxy, .zwxy, .zwzw. The valid dest masks are .xy, .zw, and .xyzw. The following mappings are post-swizzle:
- dest is a double vec2 across (x 32LSB, y 32MSB) and (z 32LSB, w 32MSB).
- src0 is a double vec2 across (x 32LSB, y 32MSB) and (z 32LSB, w 32MSB).
- src1 is a double vec2 across (x 32LSB, y 32MSB) and (z 32LSB, w 32MSB).
The following table shows the results obtained when executing the instruction with various classes of numbers, assuming that neither overflow or underflow occurs.
F means finite-real number.
src1-> |
-inf | -F | -0 | +0 | +F | +inf | NaN |
-inf | -inf | -inf | -inf | -inf | -inf | NaN | NaN |
-F | -inf | -F | src0 | src0 | +-F or +-0 | +inf | NaN |
-0 | -inf | src1 | -0 | +0 | src1 | +inf | NaN |
+0 | -inf | src1 | +0 | +0 | src1 | +inf | NaN |
+F | -inf | +-F or +-0 | src0 | src0 | +F | +inf | NaN |
+inf | NaN | +inf | +inf | +inf | +inf | +inf | NaN |
NaN | NaN | NaN | NaN | NaN | NaN | NaN | NaN |
This instruction applies to the following shader stages:
Vertex | Hull | Domain | Geometry | Pixel | Compute |
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X | X | X | X | X | X |
Minimum Shader Model
This instruction is supported in the following shader models:
Shader Model | Supported |
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Shader Model 5 | yes |
Shader Model 4.1 | no |
Shader Model 4 | no |
Shader Model 3 (DirectX HLSL) | no |
Shader Model 2 (DirectX HLSL) | no |
Shader Model 1 (DirectX HLSL) | no |