commit 39bf39f35c208109f6d5907708ee53dee2878bed
author Derek Schuff <dschuff@google.com> Tue Aug 02 23:16:09 2016 +0000
committer Derek Schuff <dschuff@google.com> Tue Aug 02 23:16:09 2016 +0000
tree 92c88047132b9387bfac686662ba7d8a3b9e0abc
parent 02a1e973a80adce224cd950bb2b5b2c78622829a

[WebAssembly] Initial SIMD128 support.

Kicks off the implementation of wasm SIMD128 support (spec:
https://github.com/stoklund/portable-simd/blob/master/portable-simd.md),
adding support for add, sub, mul for i8x16, i16x8, i32x4, and f32x4.

The spec is WIP, and might change in the near future.

Patch by João Porto

Differential Revision: https://reviews.llvm.org/D22686

llvm-svn: 277543

llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
index cb9ab15..931e2ad 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -54,6 +54,12 @@
   addRegisterClass(MVT::i64, &WebAssembly::I64RegClass);
   addRegisterClass(MVT::f32, &WebAssembly::F32RegClass);
   addRegisterClass(MVT::f64, &WebAssembly::F64RegClass);
+  if (Subtarget->hasSIMD128()) {
+    addRegisterClass(MVT::v16i8, &WebAssembly::V128RegClass);
+    addRegisterClass(MVT::v8i16, &WebAssembly::V128RegClass);
+    addRegisterClass(MVT::v4i32, &WebAssembly::V128RegClass);
+    addRegisterClass(MVT::v4f32, &WebAssembly::V128RegClass);
+  }
   // Compute derived properties from the register classes.
   computeRegisterProperties(Subtarget->getRegisterInfo());
 
@@ -190,6 +196,10 @@
     switch (Constraint[0]) {
       case 'r':
         assert(VT != MVT::iPTR && "Pointer MVT not expected here");
+        if (Subtarget->hasSIMD128() && VT.isVector()) {
+          if (VT.getSizeInBits() == 128)
+            return std::make_pair(0U, &WebAssembly::V128RegClass);
+        }
         if (VT.isInteger() && !VT.isVector()) {
           if (VT.getSizeInBits() <= 32)
             return std::make_pair(0U, &WebAssembly::I32RegClass);