AMDGPU: Document address space mapping
Summary:
Address space mapping is described in lib/Target/AMDGPU/AMDGPU.h in
Doxygen comments. This patch adds the description to user guide for
AMDGPU back-end.
Patch By: Vedran Miletić
Reviewers: tstellarAMD, arsenm
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D17046
llvm-svn: 265500
diff --git a/llvm/docs/AMDGPUUsage.rst b/llvm/docs/AMDGPUUsage.rst
index 5abbdec..b5991c7 100644
--- a/llvm/docs/AMDGPUUsage.rst
+++ b/llvm/docs/AMDGPUUsage.rst
@@ -9,6 +9,29 @@
the R600 family up until the current Volcanic Islands (GCN Gen 3).
+Conventions
+===========
+
+Address Spaces
+--------------
+
+The AMDGPU back-end uses the following address space mapping:
+
+ ============= ============================================
+ Address Space Memory Space
+ ============= ============================================
+ 0 Private
+ 1 Global
+ 2 Constant
+ 3 Local
+ 4 Generic (Flat)
+ 5 Region
+ ============= ============================================
+
+The terminology in the table, aside from the region memory space, is from the
+OpenCL standard.
+
+
Assembler
=========