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package vexriscv.plugin
import vexriscv._
import spinal.core._
import spinal.lib._
class HazardPessimisticPlugin() extends Plugin[VexRiscv] {
import Riscv._
override def setup(pipeline: VexRiscv): Unit = {
import pipeline.config._
val decoderService = pipeline.service(classOf[DecoderService])
decoderService.addDefault(HAS_SIDE_EFFECT, False)
}
override def build(pipeline: VexRiscv): Unit = {
import pipeline._
import pipeline.config._
val writesInPipeline = stages.dropWhile(_ != execute).map(s => s.arbitration.isValid && s.input(REGFILE_WRITE_VALID)) :+ RegNext(stages.last.arbitration.isValid && stages.last.input(REGFILE_WRITE_VALID))
decode.arbitration.haltByOther.setWhen(decode.arbitration.isValid && writesInPipeline.orR)
}
}
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