31 lines
1.7 KiB
Markdown
31 lines
1.7 KiB
Markdown
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# Burst Intrinsics Common class
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The [`Unity.Burst.Intrinsics.Common`](xref:Unity.Burst.Intrinsics.Common) intrinsics are for functionality shared across the hardware targets that Burst supports.
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## Pause
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[`Unity.Burst.Intrinsics.Common.Pause`](xref:Unity.Burst.Intrinsics.Common.Pause) is an intrinsic that requests that the CPU pause the current thread. It maps to `pause` on x86, and `yield` on ARM.
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Use it to stop spin locks over contending on an atomic access, which reduces contention and power on that section of code.
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## Prefetch
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The `Unity.Burst.Intrinsics.Common.Prefetch` is an experimental intrinsic that provides a hint that Burst should prefetch the memory location into the cache.
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Because the intrinsic is experimental, you must use the `UNITY_BURST_EXPERIMENTAL_PREFETCH_INTRINSIC` preprocessor define to get access to it.
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## umul128
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Use the [`Unity.Burst.Intrinsics.Common.umul128`](xref:Unity.Burst.Intrinsics.Common.umul128*) intrinsic to access 128-bit unsigned multiplication. These multiplies are useful for hashing functions. It maps 1:1 with hardware instructions on x86 and ARM targets.
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## InterlockedAnd & InterlockedOr
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The `Unity.Burst.Intrinsics.Common.InterlockedAnd` and `Unity.Burst.Intrinsics.Common.InterlockedOr` are experimental intrinsics that provides atomic and/or operations on `int`, `uint`, `long`, and `ulong` types.
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Because these intrinsics are experimental, you must use the `UNITY_BURST_EXPERIMENTAL_ATOMIC_INTRINSICS` preprocessor define to get access to them.
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## Additional resources
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* [`Unity.Burst.Intrinsics.Common` API reference](xref:Unity.Burst.Intrinsics.Common)
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* [Processor-specific SIMD extensions](csharp-burst-intrinsics-processors.md)
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* [Burst Arm Neon intrinsics reference](csharp-burst-intrinsics-neon.md)
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