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: ‘/G2’ incorporates:
* UnitDelay: ‘/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)

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向量算子优化Vector Operation Optimization

Starting build procedure for: rtwdemo_VectorOptimization

Successful completion of build procedure for: rtwdemo_VectorOptimization

Model Action Rebuild Reason

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