[v8-dev] Get rid of x87 in ia32 LCodeGen::DoBranch (issue 12208044)

[shdwthr]

Reviewers: Sven Panne,

Description:
Get rid of x87 in ia32 LCodeGen::DoBranch
Please review this at https://codereview.chromium.org/12208044/

SVN Base: http://v8.googlecode.com/svn/branches/bleeding_edge/

Affected files:
  M     src/ia32/lithium-codegen-ia32.cc


Index: src/ia32/lithium-codegen-ia32.cc
===================================================================
--- src/ia32/lithium-codegen-ia32.cc    (revision 13599)
+++ src/ia32/lithium-codegen-ia32.cc    (working copy)
@@ -2086,9 +2086,8 @@
         __ cmp(FieldOperand(reg, HeapObject::kMapOffset),
                factory()->heap_number_map());
         __ j(not_equal, &not_heap_number, Label::kNear);
-        __ fldz();
-        __ fld_d(FieldOperand(reg, HeapNumber::kValueOffset));
-        __ FCmp();
+        __ xorps(xmm0, xmm0);
+        __ ucomisd(xmm0, FieldOperand(reg, HeapNumber::kValueOffset));
         __ j(zero, false_label);
         __ jmp(true_label);
         __ bind(&not_heap_number);


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