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Add empty stubs for threadfence family routines, changes include:

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- stubs and documentation in include/hcc_details/hip_runtime.h
    - stubs with "no-op" in src/hip_memory.cpp
    - document update in hip_kernel_language.md, add suggestions to
    disable L1 and L2 caches when using the threadfence routines.

Change-Id: Ic0753170f802003055bca9d7476d7f48817b98b7


[ROCm/clr commit: 6db08e5135]
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pensun
2016-07-22 10:40:58 -05:00
parent 64d0ffb404
commit 2c945dba23
3 changed files with 74 additions and 6 deletions
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projects/clr/hipamd/docs/markdown/hip_kernel_language.md
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@@ -230,6 +230,9 @@ typedef struct dim3 {
## Memory-Fence Instructions
HIP support for __threadfence(), __threadfence_block() and __threadfence_system() is under development.
The stubs for the threadfence routines are defined in hcc_details/hip_runtime.h.
Applications that use these threadfence features should disable both of the L1 and L2 caches by:
"export HSA_DISABLE_CACHE=1"
## Synchronization Functions
The __syncthreads() built-in function is supported in HIP. The __syncthreads_count(int), __syncthreads_and(int) and __syncthreads_or(int) functions are under development.