Initial ROCm-docs (#92)

* Initial ROCm-docs commit

Co-authored-by: Aurélien Bouteiller <bouteill@icl.utk.edu>
Co-authored-by: Alex Xu <alex.xu@amd.com>
Co-authored-by: yugang-amd <yugang.wang@amd.com>

docs/api/memory_ordering.rst

@@ -0,0 +1,36 @@
+.. meta::
+  :description: rocSHMEM intra-kernel networking runtime for AMD dGPUs on the ROCm platform.
+  :keywords: rocSHMEM, API, ROCm, documentation, HIP, Networking, Communication
+
+.. _rocshmem-api-memory-ordering:
+
+---------------------------
+Memory Ordering Routines
+---------------------------
+
+ROCSHMEM_FENCE
+--------------
+
+.. cpp:function:: __device__ void rocshmem_fence()
+.. cpp:function:: __device__ void rocshmem_fence(int pe)
+.. cpp:function:: __device__ void rocshmem_ctx_fence(rocshmem_ctx_t ctx)
+.. cpp:function:: __device__ void rocshmem_ctx_fence(rocshmem_ctx_t ctx, int pe)
+
+ :param ctx: Context with which to perform this operation
+ :param pe:  Destination pe
+ :returns:   None
+
+**Description:**
+Guarantees order between messages in this context in accordance with OpenSHMEM semantics.
+
+ROCSHMEM_QUIET
+--------------
+
+.. cpp:function:: __device__ void rocshmem_ctx_quiet(rocshmem_ctx_t ctx)
+.. cpp:function:: __device__ void rocshmem_quiet()
+
+ :param ctx: Context with which to perform this operation
+ :returns:   None
+
+**Description:**
+Completes all previous operations posted to this context.