Convolution层only support group == 1？

[whongjob]

问题：
在x86上执行net_executer.prediction()的时候中断报错： x86_utils.h:906] Check failed:group == 1 (32 == 1) only support group == 1
*** Check failed:group == 1 (32 == 1) fatal error stack trace: ***:

我用的MobileNet-SSD模型，卷积层如下：
layer {
name: "conv1/dw"
type: "Convolution"
bottom: "conv0"
top: "conv1/dw"
param {
lr_mult: 0.1
decay_mult: 0.1
}
convolution_param {
num_output: 32
bias_term: false
pad: 1
kernel_size: 3
group: 32
#engine: CAFFE
weight_filler {
type: "msra"
}
}
}
是x86上只支持group==1？我把这层换成ConvolutionDepthwise也没用。