1 files changed, 75 insertions, 0 deletions
diff --git a/VexRiscv/src/main/scala/vexriscv/plugin/DivPlugin.scala b/VexRiscv/src/main/scala/vexriscv/plugin/DivPlugin.scala
new file mode 100644
index 0000000..c20dcb3
--- /dev/null
+++ b/VexRiscv/src/main/scala/vexriscv/plugin/DivPlugin.scala
@@ -0,0 +1,75 @@
+package vexriscv.plugin
+
+import vexriscv.{VexRiscv, _}
+import spinal.core._
+
+// DivPlugin was by the past a standalone plugin, but now it use the MulDivIterativePlugin implementation
+class DivPlugin extends MulDivIterativePlugin(genMul = false, genDiv = true, mulUnrollFactor = 1, divUnrollFactor = 1)
+
+//import spinal.lib.math.MixedDivider
+//
+//class DivPlugin extends Plugin[VexRiscv]{
+//   object IS_DIV extends Stageable(Bool)
+//
+//   override def setup(pipeline: VexRiscv): Unit = {
+//     import Riscv._
+//     import pipeline.config._
+//
+//     val actions = List[(Stageable[_ <: BaseType],Any)](
+//       SRC1_CTRL                -> Src1CtrlEnum.RS,
+//       SRC2_CTRL                -> Src2CtrlEnum.RS,
+//       REGFILE_WRITE_VALID      -> True,
+//       BYPASSABLE_EXECUTE_STAGE -> False,
+//       BYPASSABLE_MEMORY_STAGE  -> True,
+//       RS1_USE                 -> True,
+//       RS2_USE                 -> True,
+//       IS_DIV                   -> True
+//     )
+//
+//     val decoderService = pipeline.service(classOf[DecoderService])
+//     decoderService.addDefault(IS_DIV, False)
+//     decoderService.add(List(
+//       DIVX  -> actions
+//     ))
+//
+//   }
+//
+//   override def build(pipeline: VexRiscv): Unit = {
+//     import pipeline._
+//     import pipeline.config._
+//
+//     val divider = new MixedDivider(32, 32, true) //cmd >-> rsp
+//
+//     //Send request to the divider component
+//     execute plug new Area {
+//       import execute._
+//
+//       divider.io.cmd.valid := False
+//       divider.io.cmd.numerator := input(SRC1)
+//       divider.io.cmd.denominator := input(SRC2)
+//       divider.io.cmd.signed := !input(INSTRUCTION)(12)
+//
+//       when(arbitration.isValid && input(IS_DIV)) {
+//         divider.io.cmd.valid := !arbitration.isStuckByOthers && !arbitration.removeIt
+//         arbitration.haltItself := memory.arbitration.isValid && memory.input(IS_DIV)
+//       }
+//     }
+//
+//     //Collect response from the divider component, REGFILE_WRITE_DATA overriding
+//     memory plug new Area{
+//       import memory._
+//
+//       divider.io.flush := memory.arbitration.removeIt
+//       divider.io.rsp.ready := !arbitration.isStuckByOthers
+//
+//       when(arbitration.isValid && input(IS_DIV)) {
+//         arbitration.haltItself := !divider.io.rsp.valid
+//
+//         output(REGFILE_WRITE_DATA) := Mux(input(INSTRUCTION)(13), divider.io.rsp.remainder, divider.io.rsp.quotient).asBits
+//       }
+//
+//
+//       divider.io.rsp.payload.error.allowPruning
+//     }
+//   }
+// }