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

1 files changed, 44 insertions, 0 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyInstrConv.td b/llvm/lib/Target/WebAssembly/WebAssemblyInstrConv.td
new file mode 100644
index 00000000000..3fa29061b1d
--- /dev/null
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyInstrConv.td
@@ -0,0 +1,44 @@
+//===-- WebAssemblyInstrConv.td-WebAssembly Conversion 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 datatype conversions, truncations, reinterpretations,
+/// promotions, and demotions operand code-gen constructs.
+///
+//===----------------------------------------------------------------------===//
+
+/*
+ * TODO(jfb): Add the following.
+ *
+ * int32.wrap[int64]: wrap a 64-bit integer to a 32-bit integer
+ * int32.trunc_signed[float32]: truncate a 32-bit float to a signed 32-bit integer
+ * int32.trunc_signed[float64]: truncate a 64-bit float to a signed 32-bit integer
+ * int32.trunc_unsigned[float32]: truncate a 32-bit float to an unsigned 32-bit integer
+ * int32.trunc_unsigned[float64]: truncate a 64-bit float to an unsigned 32-bit integer
+ * int32.reinterpret[float32]: reinterpret the bits of a 32-bit float as a 32-bit integer
+ * int64.extend_signed[int32]: extend a signed 32-bit integer to a 64-bit integer
+ * int64.extend_unsigned[int32]: extend an unsigned 32-bit integer to a 64-bit integer
+ * int64.trunc_signed[float32]: truncate a 32-bit float to a signed 64-bit integer
+ * int64.trunc_signed[float64]: truncate a 64-bit float to a signed 64-bit integer
+ * int64.trunc_unsigned[float32]: truncate a 32-bit float to an unsigned 64-bit integer
+ * int64.trunc_unsigned[float64]: truncate a 64-bit float to an unsigned 64-bit integer
+ * int64.reinterpret[float64]: reinterpret the bits of a 64-bit float as a 64-bit integer
+ * float32.demote[float64]: demote a 64-bit float to a 32-bit float
+ * float32.cvt_signed[int32]: convert a signed 32-bit integer to a 32-bit float
+ * float32.cvt_signed[int64]: convert a signed 64-bit integer to a 32-bit float
+ * float32.cvt_unsigned[int32]: convert an unsigned 32-bit integer to a 32-bit float
+ * float32.cvt_unsigned[int64]: convert an unsigned 64-bit integer to a 32-bit float
+ * float32.reinterpret[int32]: reinterpret the bits of a 32-bit integer as a 32-bit float
+ * float64.promote[float32]: promote a 32-bit float to a 64-bit float
+ * float64.cvt_signed[int32]: convert a signed 32-bit integer to a 64-bit float
+ * float64.cvt_signed[int64]: convert a signed 64-bit integer to a 64-bit float
+ * float64.cvt_unsigned[int32]: convert an unsigned 32-bit integer to a 64-bit float
+ * float64.cvt_unsigned[int64]: convert an unsigned 64-bit integer to a 64-bit float
+ * float64.reinterpret[int64]: reinterpret the bits of a 64-bit integer as a 64-bit float
+ */