llvm-6502/lib/Target/MBlaze/MBlazeSchedule5.td

//===- MBlazeSchedule5.td - MBlaze Scheduling Definitions --*- tablegen -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

//===----------------------------------------------------------------------===//
// MBlaze instruction itineraries for the five stage pipeline.
//===----------------------------------------------------------------------===//
def MBlazePipe5Itineraries : ProcessorItineraries<
  [IF,ID,EX,MA,WB], [], [

  // ALU instruction with one destination register and either two register
  // source operands or one register source operand and one immediate operand.
  // The instruction takes one cycle to execute in each of the stages. The
  // two source operands are read during the decode stage and the result is
  // ready after the execute stage.
  InstrItinData< IIC_ALU,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 2                    // result ready after two cycles
               , 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // ALU multiply instruction with one destination register and either two
  // register source operands or one register source operand and one immediate
  // operand.  The instruction takes one cycle to execute in each of the
  // pipeline stages. The two source operands are read during the decode stage
  // and the result is ready after the execute stage.
  InstrItinData< IIC_ALUm,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 2                    // result ready after two cycles
               , 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // ALU divide instruction with one destination register two register source
  // operands. The instruction takes one cycle to execute in each the pipeline
  // stages except the memory access stage, which takes 31 cycles. The two
  // source operands are read during the decode stage and the result is ready
  // after the memory access stage.
  InstrItinData< IIC_ALUd,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<31,[MA]>  // 31 cycles in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 33                   // result ready after 33 cycles
               , 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // Shift instruction with one destination register and either two register
  // source operands or one register source operand and one immediate operand.
  // The instruction takes one cycle to execute in each of the pipeline stages.
  // The two source operands are read during the decode stage and the result is
  // ready after the memory access stage.
  InstrItinData< IIC_SHT,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 3                    // result ready after three cycles
               , 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // Branch instruction with one source operand register. The instruction takes
  // one cycle to execute in each of the pipeline stages. The source operand is
  // read during the decode stage.
  InstrItinData< IIC_BR,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 1 ]>,                // first operand read after one cycle

  // Conditional branch instruction with two source operand registers. The
  // instruction takes one cycle to execute in each of the pipeline stages. The
  // two source operands are read during the decode stage.
  InstrItinData< IIC_BRc,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // Branch and link instruction with one destination register and one source
  // operand register. The instruction takes one cycle to execute in each of
  // the pipeline stages. The source operand is read during the decode stage
  // and the destination register is ready after the writeback stage.
  InstrItinData< IIC_BRl,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 4                    // result ready after four cycles
               , 1 ]>,                // first operand read after one cycle

  // Cache control instruction with two source operand registers. The
  // instruction takes one cycle to execute in each of the pipeline stages
  // except the memory access stage, which takes two cycles. The source
  // operands are read during the decode stage.
  InstrItinData< IIC_WDC,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<2,[MA]>   // two cycles in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // Floating point instruction with one destination register and two source
  // operand registers. The instruction takes one cycle to execute in each of
  // the pipeline stages except the memory access stage, which takes two
  // cycles. The source operands are read during the decode stage and the
  // results are ready after the writeback stage.
  InstrItinData< IIC_FPU,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<2,[MA]>   // two cycles in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 5                    // result ready after five cycles
               , 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // Floating point divide instruction with one destination register and two
  // source operand registers. The instruction takes one cycle to execute in
  // each of the pipeline stages except the memory access stage, which takes 26
  // cycles. The source operands are read during the decode stage and the
  // results are ready after the writeback stage.
  InstrItinData< IIC_FPUd,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<26,[MA]>  // 26 cycles in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 29                   // result ready after 29 cycles
               , 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // Convert floating point to integer instruction with one destination
  // register and one source operand register. The instruction takes one cycle
  // to execute in each of the pipeline stages except the memory access stage,
  // which takes three cycles. The source operands are read during the decode
  // stage and the results are ready after the writeback stage.
  InstrItinData< IIC_FPUi,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<3,[MA]>   // three cycles in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 6                   // result ready after six cycles
               , 1 ]>,                // first operand read after one cycle

  // Convert integer to floating point instruction with one destination
  // register and one source operand register. The instruction takes one cycle
  // to execute in each of the pipeline stages except the memory access stage,
  // which takes two cycles. The source operands are read during the decode
  // stage and the results are ready after the writeback stage.
  InstrItinData< IIC_FPUf,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<2,[MA]>   // two cycles in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 5                    // result ready after five cycles
               , 1 ]>,                // first operand read after one cycle

  // Floating point square root instruction with one destination register and
  // one source operand register. The instruction takes one cycle to execute in
  // each of the pipeline stages except the memory access stage, which takes 25
  // cycles. The source operands are read during the decode stage and the
  // results are ready after the writeback stage.
  InstrItinData< IIC_FPUs,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<25,[MA]>  // 25 cycles in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 28                   // result ready after 28 cycles
               , 1 ]>,                // first operand read after one cycle

  // Floating point comparison instruction with one destination register and
  // two source operand registers. The instruction takes one cycle to execute
  // in each of the pipeline stages. The source operands are read during the
  // decode stage and the results are ready after the execute stage.
  InstrItinData< IIC_FPUc,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 2                    // result ready after two cycles
               , 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // FSL get instruction with one register or immediate source operand and one
  // destination register. The instruction takes one cycle to execute in each
  // of the pipeline stages. The one source operand is read during the decode
  // stage and the result is ready after the execute stage.
  InstrItinData< IIC_FSLg,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 2                    // result ready after two cycles
               , 1 ]>,                // first operand read after one cycle

  // FSL put instruction with either two register source operands or one
  // register source operand and one immediate operand. There is no result
  // produced by the instruction. The instruction takes one cycle to execute in
  // each of the pipeline stages. The two source operands are read during the
  // decode stage.
  InstrItinData< IIC_FSLp,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 1                    // first operand read after one cycle
               , 1 ]>,                // second operand read after one cycle

  // Memory store instruction with either three register source operands or two
  // register source operands and one immediate operand. There is no result
  // produced by the instruction. The instruction takes one cycle to execute in
  // each of the pipeline stages. All of the source operands are read during
  // the decode stage.
  InstrItinData< IIC_MEMs,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 1                    // first operand read after one cycle
               , 1                    // second operand read after one cycle
               , 1 ]>,                // third operand read after one cycle

  // Memory load instruction with one destination register and either two
  // register source operands or one register source operand and one immediate
  // operand. The instruction takes one cycle to execute in each of the
  // pipeline stages. All of the source operands are read during the decode
  // stage and the result is ready after the writeback stage.
  InstrItinData< IIC_MEMl,
               [ InstrStage<1,[IF]>   // one cycle in fetch stage
               , InstrStage<1,[ID]>   // one cycle in decode stage
               , InstrStage<1,[EX]>   // one cycle in execute stage
               , InstrStage<1,[MA]>   // one cycle in memory access stage
               , InstrStage<1,[WB]>], // one cycle in write back stage
               [ 4                    // result ready after four cycles
               , 1                    // second operand read after one cycle
               , 1 ]>                 // third operand read after one cycle
]>;