Emit VMLA for multiply-add on ARM

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index ff6da03bb5811260b4add49b34bc8dff5bb838c6..f66cdec2b2e6f582baf0286a97f952c7a1b2bde7 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -1311,6 +1311,22 @@ LInstruction* LChunkBuilder::DoMul(HMul* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoMultiplyAdd(HMultiplyAdd* instr) {
+  //printf("LChunkBuilder::DoMultiplyAdd\n");
+  ASSERT(instr->representation().IsDouble());
+  ASSERT(instr->a()->representation().IsDouble());
+  ASSERT(instr->b()->representation().IsDouble());
+  ASSERT(instr->c()->representation().IsDouble());
+
+  // FIXME: Not entirely sure this is how to do it..

[ulan_google, 2012/11/07 09:54:03]

This looks correct.

+  LOperand* a = UseRegisterAtStart(instr->a());
+  LOperand* b = UseRegisterAtStart(instr->b());
+  LOperand* c = UseRegisterAtStart(instr->c());
+  LMultiplyAdd* result = new(zone()) LMultiplyAdd(c, a, b);
+  return DefineSameAsFirst(result);
+}
+
+
 LInstruction* LChunkBuilder::DoSub(HSub* instr) {
   if (instr->representation().IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());