MBlazeSchedule3.td [plain text]
//===-- MBlazeSchedule3.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 three stage pipeline.
//===----------------------------------------------------------------------===//
def MBlazePipe3Itineraries : ProcessorItineraries<
[IF,ID,EX], [], [
// 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
[ 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 except the execute stage, which takes three cycles. 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<3,[EX]>], // three cycles in execute stage
[ 4 // result ready after four 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 execute stage, which takes 34 cycles. The two
// source operands are read during the decode stage and the result is ready
// after the execute stage.
InstrItinData< IIC_ALUd,
[ InstrStage<1,[IF]> // one cycle in fetch stage
, InstrStage<1,[ID]> // one cycle in decode stage
, InstrStage<34,[EX]>], // 34 cycles in execute stage
[ 35 // result ready after 35 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
// except the execute stage, which takes two cycles. The two source operands
// are read during the decode stage and the result is ready after the execute
// stage.
InstrItinData< IIC_SHT,
[ InstrStage<1,[IF]> // one cycle in fetch stage
, InstrStage<1,[ID]> // one cycle in decode stage
, InstrStage<2,[EX]>], // two cycles in execute 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
[ 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
[ 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 execute 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
[ 2 // result ready after two 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<2,[EX]>], // two cycles in execute 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 execute stage, which takes six cycles. The
// source operands are read during the decode stage and the results are ready
// after the execute stage.
InstrItinData< IIC_FPU,
[ InstrStage<1,[IF]> // one cycle in fetch stage
, InstrStage<1,[ID]> // one cycle in decode stage
, InstrStage<6,[EX]>], // six cycles in execute stage
[ 7 // result ready after seven 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 execute stage, which takes 30
// cycles. The source operands are read during the decode stage and the
// results are ready after the execute stage.
InstrItinData< IIC_FPUd,
[ InstrStage<1,[IF]> // one cycle in fetch stage
, InstrStage<1,[ID]> // one cycle in decode stage
, InstrStage<30,[EX]>], // one cycle in execute stage
[ 31 // result ready after 31 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 execute stage,
// which takes seven cycles. The source operands are read during the decode
// stage and the results are ready after the execute stage.
InstrItinData< IIC_FPUi,
[ InstrStage<1,[IF]> // one cycle in fetch stage
, InstrStage<1,[ID]> // one cycle in decode stage
, InstrStage<7,[EX]>], // seven cycles in execute stage
[ 8 // result ready after eight 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 execute stage,
// which takes six cycles. The source operands are read during the decode
// stage and the results are ready after the execute stage.
InstrItinData< IIC_FPUf,
[ InstrStage<1,[IF]> // one cycle in fetch stage
, InstrStage<1,[ID]> // one cycle in decode stage
, InstrStage<6,[EX]>], // six cycles in execute stage
[ 7 // result ready after seven 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 execute stage, which takes 29
// cycles. The source operands are read during the decode stage and the
// results are ready after the execute stage.
InstrItinData< IIC_FPUs,
[ InstrStage<1,[IF]> // one cycle in fetch stage
, InstrStage<1,[ID]> // one cycle in decode stage
, InstrStage<29,[EX]>], // 29 cycles in execute stage
[ 30 // result ready after 30 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 except the execute stage, which takes three
// cycles. 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<3,[EX]>], // three cycles in execute stage
[ 4 // result ready after four 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 except the execute stage, which takes two cycles.
// 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<2,[EX]>], // two cycles in execute stage
[ 3 // 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 except the execute stage, which takes two
// cycles. 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<2,[EX]>], // two cycles in execute 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 except the execute stage, which takes two
// cycles. 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<2,[EX]>], // two cycles in execute 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 except the execute stage, which takes two cycles. All of
// the source operands are read during the decode stage and the result is
// ready after the execute stage.
InstrItinData< IIC_MEMl,
[ InstrStage<1,[IF]> // one cycle in fetch stage
, InstrStage<1,[ID]> // one cycle in decode stage
, InstrStage<2,[EX]>], // two cycles in execute stage
[ 3 // result ready after four cycles
, 1 // second operand read after one cycle
, 1 ]> // third operand read after one cycle
]>;