diff --git a/sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/MathUtils.scala b/sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/MathUtils.scala
index a4c6c75358f4e..e318a60ce99ab 100644
--- a/sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/MathUtils.scala
+++ b/sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/MathUtils.scala
@@ -123,6 +123,18 @@ object MathUtils {
     if (r < 0) (r + n) % n else r
   }
 
+  // Casts a rounded double (the result of Math.ceil/Math.floor) to long, throwing an arithmetic
+  // overflow error when the value cannot be represented as a long. NaN is passed through to the
+  // JVM cast (which yields 0), matching the previous behavior. Shared by the eval and codegen
+  // paths of `Ceil`/`Floor` so the two never diverge.
+  def doubleToLong(value: Double, context: QueryContext): Long = {
+    if (!value.isNaN &&
+      (value < Long.MinValue.toDouble || value >= Long.MaxValue.toDouble)) {
+      throw ExecutionErrors.arithmeticOverflowError("long overflow", context = context)
+    }
+    value.toLong
+  }
+
   def withOverflow[A](f: => A, hint: String = "", context: QueryContext = null): A = {
     try {
       f
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
index 7a76968018c0d..81b576146abe8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
@@ -252,34 +252,6 @@ case class Cbrt(child: Expression) extends UnaryMathExpression(math.cbrt, "CBRT"
   override protected def withNewChildInternal(newChild: Expression): Cbrt = copy(child = newChild)
 }
 
-private object CeilFloor {
-  def doubleToLong(value: Double, context: QueryContext): Long = {
-    if (!value.isNaN &&
-        (value < Long.MinValue.toDouble || value >= Long.MaxValue.toDouble)) {
-      throw QueryExecutionErrors.arithmeticOverflowError("long overflow", context = context)
-    }
-    value.toLong
-  }
-
-  def doubleToLongCode(
-      input: String,
-      funcName: String,
-      result: String,
-      roundedValue: String,
-      errorContext: String): String = {
-    s"""
-       |double $roundedValue = java.lang.Math.$funcName($input);
-       |if (!java.lang.Double.isNaN($roundedValue) &&
-       |    ($roundedValue < (double) java.lang.Long.MIN_VALUE ||
-       |     $roundedValue >= (double) java.lang.Long.MAX_VALUE)) {
-       |  throw QueryExecutionErrors.arithmeticOverflowError(
-       |    "long overflow", "", $errorContext);
-       |}
-       |$result = (long) $roundedValue;
-       |""".stripMargin
-  }
-}
-
 case class Ceil(child: Expression, failOnError: Boolean = SQLConf.get.ansiEnabled)
   extends UnaryMathExpression(math.ceil, "CEIL") with SupportQueryContext {
   override def dataType: DataType = child.dataType match {
@@ -299,7 +271,7 @@ case class Ceil(child: Expression, failOnError: Boolean = SQLConf.get.ansiEnable
   protected override def nullSafeEval(input: Any): Any = child.dataType match {
     case LongType => input.asInstanceOf[Long]
     case DoubleType if failOnError =>
-      CeilFloor.doubleToLong(f(input.asInstanceOf[Double]), getContextOrNull())
+      MathUtils.doubleToLong(f(input.asInstanceOf[Double]), getContextOrNull())
     case DoubleType => f(input.asInstanceOf[Double]).toLong
     case DecimalType.Fixed(_, _) => input.asInstanceOf[Decimal].ceil
   }
@@ -311,11 +283,9 @@ case class Ceil(child: Expression, failOnError: Boolean = SQLConf.get.ansiEnable
         defineCodeGen(ctx, ev, c => s"$c.ceil()")
       case LongType => defineCodeGen(ctx, ev, c => s"$c")
       case DoubleType if failOnError =>
-        nullSafeCodeGen(ctx, ev, c => {
-          val roundedValue = ctx.freshName("roundedValue")
-          val errorContext = getContextOrNullCode(ctx)
-          CeilFloor.doubleToLongCode(c, funcName, ev.value, roundedValue, errorContext)
-        })
+        val mathUtils = MathUtils.getClass.getCanonicalName.stripSuffix("$")
+        defineCodeGen(ctx, ev, c =>
+          s"$mathUtils.doubleToLong(java.lang.Math.$funcName($c), ${getContextOrNullCode(ctx)})")
       case _ => defineCodeGen(ctx, ev, c => s"(long)(java.lang.Math.${funcName}($c))")
     }
   }
@@ -591,7 +561,7 @@ case class Floor(child: Expression, failOnError: Boolean = SQLConf.get.ansiEnabl
   protected override def nullSafeEval(input: Any): Any = child.dataType match {
     case LongType => input.asInstanceOf[Long]
     case DoubleType if failOnError =>
-      CeilFloor.doubleToLong(f(input.asInstanceOf[Double]), getContextOrNull())
+      MathUtils.doubleToLong(f(input.asInstanceOf[Double]), getContextOrNull())
     case DoubleType => f(input.asInstanceOf[Double]).toLong
     case DecimalType.Fixed(_, _) => input.asInstanceOf[Decimal].floor
   }
@@ -603,11 +573,9 @@ case class Floor(child: Expression, failOnError: Boolean = SQLConf.get.ansiEnabl
         defineCodeGen(ctx, ev, c => s"$c.floor()")
       case LongType => defineCodeGen(ctx, ev, c => s"$c")
       case DoubleType if failOnError =>
-        nullSafeCodeGen(ctx, ev, c => {
-          val roundedValue = ctx.freshName("roundedValue")
-          val errorContext = getContextOrNullCode(ctx)
-          CeilFloor.doubleToLongCode(c, funcName, ev.value, roundedValue, errorContext)
-        })
+        val mathUtils = MathUtils.getClass.getCanonicalName.stripSuffix("$")
+        defineCodeGen(ctx, ev, c =>
+          s"$mathUtils.doubleToLong(java.lang.Math.$funcName($c), ${getContextOrNullCode(ctx)})")
       case _ => defineCodeGen(ctx, ev, c => s"(long)(java.lang.Math.${funcName}($c))")
     }
   }