向量算子优化Vector Operation Optimization

向量算子优化Vector Operation Optimization

查看MATLAB命令View MATLAB Command

示例显示Simulink编码器 ，将生成向量的块输出，设置为标量，优化生成的代码，例如Mux、Sum、Gain和Bus。这种优化通过用局部变量替换临时局部数组来减少堆栈内存。

示例模型Example Model

模型采用矢量优化rtwdemo_VectorOptimization，增益块G1和G2的输出为矢量信号tmp1和tmp2。向量的宽度为10。

model = 'rtwdemo_VectorOptimization';

open_system(model);

set_param(model, 'SimulationCommand', 'update')

Generate Code

为生成和检查过程，创建临时文件夹（在系统临时文件夹中）。

currentDir = pwd;

[~,cgDir] = rtwdemodir();

Build the model.

rtwbuild(model)

### Starting build procedure for: rtwdemo_VectorOptimization

### Successful completion of build procedure for: rtwdemo_VectorOptimization

Build Summary

Top model targets built:

Model                       Action                       Rebuild Reason

===========================================================================================================

rtwdemo_VectorOptimization  Code generated and compiled  Code generation information file does not exist.

1 of 1 models built (0 models already up to date)

Build duration: 0h 0m 25.92s

The optimized code is in rtwdemo_VectorOptimization.c. The signals tmp1 and tmp2 are the local variables rtb_tmp1 and rtb_tmp2.

cfile = fullfile(cgDir,'rtwdemo_VectorOptimization_grt_rtw',...

'rtwdemo_VectorOptimization.c');

rtwdemodbtype(cfile,'/* Model step', '/* Model initialize', 1, 0);

/* Model step function */

void rtwdemo_VectorOptimization_step(void)

{

real_T rtb_Sum3;

real_T rtb_tmp1;

real_T rtb_tmp2;

int32_T i;

for (i = 0; i < 10; i++) {

/* Gain: '<Root>/G2' incorporates:

*  UnitDelay: '<Root>/X2'

*/

rtb_tmp2 = 0.3 * rtwdemo_VectorOptimization_DW.X2_DSTATE[i];

/* Gain: '<Root>/G1' incorporates:

*  UnitDelay: '<Root>/X1'

*/

rtb_tmp1 = 0.2 * rtwdemo_VectorOptimization_DW.X1_DSTATE[i];

/* Sum: '<Root>/Sum3' incorporates:

*  Gain: '<Root>/G3'

*  Inport: '<Root>/In2'

*  Sum: '<Root>/Sum1'

*  Sum: '<Root>/Sum2'

*  UnitDelay: '<Root>/X3'

*/

rtb_Sum3 = ((rtwdemo_VectorOptimization_U.In2[i] - 0.4 *

rtwdemo_VectorOptimization_DW.X3_DSTATE[i]) - rtb_tmp2) -

rtb_tmp1;

/* Outport: '<Root>/Out2' */

rtwdemo_VectorOptimization_Y.Out2[i] = rtb_Sum3;

/* Update for UnitDelay: '<Root>/X3' */

rtwdemo_VectorOptimization_DW.X3_DSTATE[i] = rtb_tmp2;

/* Update for UnitDelay: '<Root>/X2' */

rtwdemo_VectorOptimization_DW.X2_DSTATE[i] = rtb_tmp1;

/* Update for UnitDelay: '<Root>/X1' */

rtwdemo_VectorOptimization_DW.X1_DSTATE[i] = rtb_Sum3;

}

}

关闭模型和代码生成报告

bdclose(model)

rtwdemoclean;

cd(currentDir)