[arm][arm64] Minor improvements to MathMaxMin.

src/arm64/macro-assembler-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 1659 matching lines @@
 void MacroAssembler::AssertPositiveOrZero(Register value) {
   if (emit_debug_code()) {
     Label done;
     int sign_bit = value.Is64Bits() ? kXSignBit : kWSignBit;
     Tbz(value, sign_bit, &done);
     Abort(kUnexpectedNegativeValue);
     Bind(&done);
   }
 }
 
+void MacroAssembler::AssertNumber(Register value) {
+  if (emit_debug_code()) {
+    Label done;
+    JumpIfSmi(value, &done);
+    JumpIfHeapNumber(value, &done);
+    Abort(kOperandIsNotANumber);
+    Bind(&done);
+  }
+}
 
 void MacroAssembler::CallStub(CodeStub* stub, TypeFeedbackId ast_id) {
   DCHECK(AllowThisStubCall(stub));  // Stub calls are not allowed in some stubs.
   Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id);
 }
 
 
 void MacroAssembler::TailCallStub(CodeStub* stub) {
   Jump(stub->GetCode(), RelocInfo::CODE_TARGET);
 }
@@ skipping 3195 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64