From: vegorov@chromium.org <vegorov@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Fri, 25 Mar 2011 12:51:32 +0000 (+0000)
Subject: Check for SSE2 support in FullCodeGenerator::EmitMathPow.
X-Git-Tag: upstream/4.7.83~19811
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b97fc27c938952702fdb12e6b5d6c9b3b9f798e9;p=platform%2Fupstream%2Fv8.git

Check for SSE2 support in FullCodeGenerator::EmitMathPow.

Do not emit call to the MathPowStub when SSE2 is not available because it requires SSE2.

Review URL: http://codereview.chromium.org/6736006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7366 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---

diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 24b3f47..2c82220 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -2800,8 +2800,12 @@ void FullCodeGenerator::EmitMathPow(ZoneList<Expression*>* args) {
   VisitForStackValue(args->at(0));
   VisitForStackValue(args->at(1));
 
-  MathPowStub stub;
-  __ CallStub(&stub);
+  if (masm()->isolate()->cpu_features()->IsSupported(SSE2)) {
+    MathPowStub stub;
+    __ CallStub(&stub);
+  } else {
+    __ CallRuntime(Runtime::kMath_pow, 2);
+  }
   context()->Plug(eax);
 }