X87: initialize the FPU state for X87 in prologue.

src/x87/lithium-codegen-x87.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 197 matching lines @@
         // Store dynamic frame alignment state in the first local.
         int offset = JavaScriptFrameConstants::kDynamicAlignmentStateOffset;
         if (dynamic_frame_alignment_) {
           __ mov(Operand(ebp, offset), edx);
         } else {
           __ mov(Operand(ebp, offset), Immediate(kNoAlignmentPadding));
         }
       }
     }
   }
+
+  // Initailize FPU state.
+  __ fninit();
+
   return !is_aborted();
 }
 
 
 void LCodeGen::DoPrologue(LPrologue* instr) {
   Comment(";;; Prologue begin");
 
   // Possibly allocate a local context.
   if (info_->num_heap_slots() > 0) {
     Comment(";;; Allocate local context");
@@ skipping 43 matching lines @@
           Label done;
           __ JumpIfInNewSpace(esi, eax, &done, Label::kNear);
           __ Abort(kExpectedNewSpaceObject);
           __ bind(&done);
         }
       }
     }
     Comment(";;; End allocate local context");
   }
 
-  // Initailize FPU state.
-  __ fninit();
-
   Comment(";;; Prologue end");
 }
 
 
 void LCodeGen::GenerateOsrPrologue() {
   // Generate the OSR entry prologue at the first unknown OSR value, or if there
   // are none, at the OSR entrypoint instruction.
   if (osr_pc_offset_ >= 0) return;
 
   osr_pc_offset_ = masm()->pc_offset();
@@ skipping 6074 matching lines @@
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87