WebAssembly: basic instructions todo, and basic register info.
Summary:
This code is based on AArch64 for modern backend good practice, and NVPTX for
virtual ISA concerns.
Reviewers: sunfish
Subscribers: aemerson, llvm-commits, jfb
Differential Revision: http://reviews.llvm.org/D11070
llvm-svn: 241923
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td b/llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td
new file mode 100644
index 0000000..5ab40e8
--- /dev/null
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td
@@ -0,0 +1,46 @@
+// WebAssemblyInstrMemory.td-WebAssembly Memory codegen support -*- tablegen -*-
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief WebAssembly Memory operand code-gen constructs.
+///
+//===----------------------------------------------------------------------===//
+
+/*
+ * TODO(jfb): Add the following.
+ * Each has optional alignment and immediate byte offset.
+ *
+ * int32.load_sx[int8]: sign-extend to int32
+ * int32.load_sx[int16]: sign-extend to int32
+ * int32.load_zx[int8]: zero-extend to int32
+ * int32.load_zx[int16]: zero-extend to int32
+ * int32.load[int32]: (no conversion)
+ * int64.load_sx[int8]: sign-extend to int64
+ * int64.load_sx[int16]: sign-extend to int64
+ * int64.load_sx[int32]: sign-extend to int64
+ * int64.load_zx[int8]: zero-extend to int64
+ * int64.load_zx[int16]: zero-extend to int64
+ * int64.load_zx[int32]: zero-extend to int64
+ * int64.load[int64]: (no conversion)
+ * float32.load[float32]: (no conversion)
+ * float64.load[float64]: (no conversion)
+ *
+ * int32.store[int8]: wrap int32 to int8
+ * int32.store[int16]: wrap int32 to int16
+ * int32.store[int32]: (no conversion)
+ * int64.store[int8]: wrap int64 to int8
+ * int64.store[int16]: wrap int64 to int16
+ * int64.store[int32]: wrap int64 to int32
+ * int64.store[int64]: (no conversion)
+ * float32.store[float32]: (no conversion)
+ * float64.store[float64]: (no conversion)
+ *
+ * load_global: load the value of a given global variable
+ * store_global: store a given value to a given global variable
+ */