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// See LICENSE for license details.
package chisel3.core
import scala.language.experimental.macros
import chisel3.internal._
import chisel3.internal.Builder.{pushOp}
import chisel3.internal.sourceinfo.{SourceInfo, MuxTransform}
import chisel3.internal.firrtl._
import chisel3.internal.firrtl.PrimOp._
import chisel3.SourceInfoDoc
object Mux extends SourceInfoDoc {
/** Creates a mux, whose output is one of the inputs depending on the
* value of the condition.
*
* @param cond condition determining the input to choose
* @param con the value chosen when `cond` is true
* @param alt the value chosen when `cond` is false
* @example
* {{{
* val muxOut = Mux(data_in === 3.U, 3.U(4.W), 0.U(4.W))
* }}}
*/
def apply[T <: Data](cond: Bool, con: T, alt: T): T = macro MuxTransform.apply[T]
/** @group SourceInfoTransformMacro */
def do_apply[T <: Data](cond: Bool, con: T, alt: T)(implicit sourceInfo: SourceInfo,
compileOptions: CompileOptions): T = {
requireIsHardware(cond, "mux condition")
requireIsHardware(con, "mux true value")
requireIsHardware(alt, "mux false value")
val d = cloneSupertype(Seq(con, alt), "Mux")
pushOp(DefPrim(sourceInfo, d, MultiplexOp, cond.ref, con.ref, alt.ref))
}
}
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