[x64] Avoid sign extension in TruncateFloat64ToInt32(TruncationMode::kJavaScript)

src/x64/macro-assembler-x64.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_X64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 3726 matching lines @@
                                      int offset) {
   DoubleToIStub stub(isolate(), input_reg, result_reg, offset, true);
   call(stub.GetCode(), RelocInfo::CODE_TARGET);
 }
 
 
 void MacroAssembler::TruncateHeapNumberToI(Register result_reg,
                                            Register input_reg) {
   Label done;
   Movsd(xmm0, FieldOperand(input_reg, HeapNumber::kValueOffset));
-  Cvttsd2siq(result_reg, xmm0);
-  cmpq(result_reg, Immediate(1));
+  Cvttsd2si(result_reg, xmm0);
+  cmpl(result_reg, Immediate(1));
   j(no_overflow, &done, Label::kNear);
 
   // Slow case.
   if (input_reg.is(result_reg)) {
     subp(rsp, Immediate(kDoubleSize));
     Movsd(MemOperand(rsp, 0), xmm0);
     SlowTruncateToI(result_reg, rsp, 0);
     addp(rsp, Immediate(kDoubleSize));
   } else {
     SlowTruncateToI(result_reg, input_reg);
   }
 
   bind(&done);
   // Keep our invariant that the upper 32 bits are zero.
   movl(result_reg, result_reg);
 }
 
 
 void MacroAssembler::TruncateDoubleToI(Register result_reg,
                                        XMMRegister input_reg) {
   Label done;
-  Cvttsd2siq(result_reg, input_reg);
-  cmpq(result_reg, Immediate(1));
+  Cvttsd2si(result_reg, input_reg);
+  cmpl(result_reg, Immediate(1));
   j(no_overflow, &done, Label::kNear);
 
   subp(rsp, Immediate(kDoubleSize));
   Movsd(MemOperand(rsp, 0), input_reg);
   SlowTruncateToI(result_reg, rsp, 0);
   addp(rsp, Immediate(kDoubleSize));
 
   bind(&done);
   // Keep our invariant that the upper 32 bits are zero.
   movl(result_reg, result_reg);
@@ skipping 1922 matching lines @@
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64