Add fabs(<4 x float>) to the integrated ARM assembler.

src/IceInstARM32.cpp

 //===- subzero/src/IceInstARM32.cpp - ARM32 instruction implementation ----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 2446 matching lines @@
   Str << ", ";
   getSrc(0)->emit(Func);
 }
 
 void InstARM32Vabs::emitIAS(const Cfg *Func) const {
   assert(getSrcSize() == 1);
   auto *Asm = Func->getAssembler<ARM32::AssemblerARM32>();
   const Variable *Dest = getDest();
   switch (Dest->getType()) {
   default:
-    // TODO(kschimpf): Implement vector fabs.
-    Asm->setNeedsTextFixup();
-    break;
+    llvm::report_fatal_error("fabs not defined on type " +
+                             typeIceString(Dest->getType()));
   case IceType_f32:
     Asm->vabss(Dest, getSrc(0), getPredicate());
     break;
   case IceType_f64:
     Asm->vabsd(Dest, getSrc(0), getPredicate());
     break;
+  case IceType_v4f32:
+    assert(CondARM32::isUnconditional(getPredicate()) &&
+           "fabs must be unconditional");
+    Asm->vabsq(Dest, getSrc(0));
   }
-  if (Asm->needsTextFixup())
-    emitUsingTextFixup(Func);
+  assert(!Asm->needsTextFixup());
 }
 
 void InstARM32Vabs::dump(const Cfg *Func) const {
   if (!BuildDefs::dump())
     return;
   Ostream &Str = Func->getContext()->getStrDump();
   dumpDest(Func);
   Str << " = vabs" << getPredicate() << getVecWidthString(getSrc(0)->getType());
 }
 
@@ skipping 287 matching lines @@
 
 template class InstARM32FourAddrGPR<InstARM32::Mla>;
 template class InstARM32FourAddrGPR<InstARM32::Mls>;
 
 template class InstARM32CmpLike<InstARM32::Cmn>;
 template class InstARM32CmpLike<InstARM32::Cmp>;
 template class InstARM32CmpLike<InstARM32::Tst>;
 
 } // end of namespace ARM32
 } // end of namespace Ice