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VexRiscv
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Improve CSR FMax

This commit is contained in:
Charles Papon 2019-09-16 13:53:55 +02:00
parent b65ef189eb
commit 6ed41f7361
1 changed files with 7 additions and 2 deletions
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9
src/main/scala/vexriscv/plugin/CsrPlugin.scala
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@ -945,9 +945,14 @@ class CsrPlugin(val config: CsrPluginConfig) extends Plugin[VexRiscv] with Excep
val readData = B(0, 32 bits) val readData = B(0, 32 bits)
val writeInstruction = arbitration.isValid && input(IS_CSR) && input(CSR_WRITE_OPCODE) val writeInstruction = arbitration.isValid && input(IS_CSR) && input(CSR_WRITE_OPCODE)
val readInstruction = arbitration.isValid && input(IS_CSR) && input(CSR_READ_OPCODE) val readInstruction = arbitration.isValid && input(IS_CSR) && input(CSR_READ_OPCODE)
val writeEnable = writeInstruction && ! blockedBySideEffects && !arbitration.isStuckByOthers// && readDataRegValid val writeEnable = writeInstruction && ! blockedBySideEffects // && readDataRegValid
val readEnable = readInstruction && ! blockedBySideEffects && !arbitration.isStuckByOthers// && !readDataRegValid val readEnable = readInstruction && ! blockedBySideEffects // && !readDataRegValid
//arbitration.isStuckByOthers, in case of the hazardPlugin is in the executeStage //arbitration.isStuckByOthers, in case of the hazardPlugin is in the executeStage
val hazardStage = service(classOf[RegFileService]).readStage()
if(hazardStage == execute) when (arbitration.isStuckByOthers){
writeEnable := False
readEnable := False
}
// def readDataReg = memory.input(REGFILE_WRITE_DATA) //PIPE OPT // def readDataReg = memory.input(REGFILE_WRITE_DATA) //PIPE OPT