在Vitis HLS 工具中，要真正完成AXI总线突发，我们需要一个合适的代码风格并结合恰当的指令设置来达到这个目的。本章节带大家看看如何玩转AXI总线突发读写的代码风格-上。
01
HLS编译器是如何在代码中寻找并判断代码中的突发访问需求的？
02
成功实现突发读写代码风格有哪些要求？
03
从实际代码出发，看看不同的代码风格下编译器如何分别流水线突发和顺序突发读写
for(size_t i = 0; i < size; i+=4) {
out[4*i+0] = f(in[4*i+0]);
out[4*i+1] = f(in[4*i+1]);
out[4*i+2] = f(in[4*i+2]);
out[4*i+3] = f(in[4*i+3]);
}
/* requests can move anywhere in func */
rb = ReadReq(in, size);
wb = WriteReq(out, size);
for(size_t i = 0; i < size; i+=4) {
Write(wb, 4*i+0) = f(Read(rb, 4*i+0));
Write(wb, 4*i+1) = f(Read(rb, 4*i+1));
Write(wb, 4*i+2) = f(Read(rb, 4*i+2));
Write(wb, 4*i+3) = f(Read(rb, 4*i+3));
}
WriteResp(wb);
for(size_t i = 0; i < size; i+=4) {
rb = ReadReq(in+4*i, 4);
wb = WriteReq(out+4*i, 4);
Write(wb, 0) = f(Read(rb, 0));
Write(wb, 1) = f(Read(rb, 1));
Write(wb, 2) = f(Read(rb, 2));
Write(wb, 3) = f(Read(rb, 3));
WriteResp(wb);
}
