set_top <FUNC> (in synthesis Tcl file) | On the first line of <FUNC>, add #pragma HLS function top |
#include <ap_int.h> | #include <hls/ap_int.hpp>
Depending on the type(s) used, add using hls::ap_uint;, and/or using hls::ap_int; |
#include <ap_fixed.h> | #include <hls/ap_fixpt.hpp>
Depending on the type(s) used, add using hls::ap_fixpt; #define ap_fixed ap_fixpt , and/or using hls::ap_ufixpt; #define ap_ufixed ap_ufixpt |
#include <hls_stream.h> | #include <hls/streaming.hpp>
#define stream FIFO
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hls::stream constructor | Vitis/Vivado HLS’s stream constructor optionally takes a string name as argument, while SmartHLS’s FIFO constructor optionally takes depth and type.VHLS’s stream assumes infinite size in C simulation, so set equivalent SmartHLS FIFOs’ depths very deep for C simulation.Example of mapping an external FIFO: VHLS: hls::stream<int> data; SmartHLS: hls::stream<int> data(1e4); Example of mapping an internal FIFO: VHLS: hls::stream<int> data;
#pragma HLS stream variable = data depth = 2
SmartHLS:#ifndef __SYNTHESIS__
#define INTERNAL_STREAM_DEPTH 1e4
#else
#define INTERNAL_STREAM_DEPTH 2
#endif
hls::stream<int> data(INTERNAL_STREAM_DEPTH);
VHLS’s stream constructor may take FIFO name as argument, which should be removed. |
<AP_INT_VAR>.to_int() | <AP_INT_VAR>.to_uint64(), or <AP_INT_VAR>.to_int64()
VHLS’s ap_int has a list of C-type conversion functions (e.g. to_short(), to_int(), to_long()), while SmartHLS only has to_uint64()/to_int64() and expects users to add explicit casting to the return value. |
<AP_INT_VAR>.range(7,0).to_int() | (ap_uint<...><AP_INT_VAR>.range(7,0)).to_int64()
In SmartHLS, the return value of <AP_INT_VAR>.range() cannot be used to directly invoke to_int64()/to_uint64(). |
stringstream >> ap_fixpt<W, IW, Q_M, O_M> | std::stringstream istr(line)
ap_fixpt<W, IW, Q_M, O_M> = args;
double args_temp;
istr >> args_temp;
args = args_temp;
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#include <assert.h> | #ifdef __SYNTHESIS__
#define NDEBUG
#endif
#include <assert.h>
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