Vectorize several TensorPrimitive operations for double

[stephentoub]

#94555 added new generic versions of existing float-based TensorPrimitive methods. However, several of them are only currently vectorized when T == float. That vectorization should be extended at least to double as well:

• Exp
• Log
• Log2
• Sigmoid
• Cosh
• Sinh
• Tanh

runtime/src/libraries/System.Numerics.Tensors/src/System/Numerics/Tensors/netcore/TensorPrimitives.netcore.cs

Line 14 in 7e51126

// - Vectorize the trig-related functions for Ts other than floats

Tagging subscribers to this area: @dotnet/area-system-numerics-tensors
See info in area-owners.md if you want to be subscribed.

Issue Details

---

#94555 added new generic versions of existing float-based TensorPrimitive methods. However, several of them are only currently vectorized when T == float. That vectorization should be extended at least to double as well:

• Exp
• Cosh
• Sinh
• Tanh
• Log
• Log2
• Sigmoid

Author:	stephentoub
Assignees:	-
Labels:	area-System.Numerics.Tensors, tenet-performance
Milestone:	9.0.0