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Vivado High-Level Synthesis

Advanced algorithms used today in wireless, medical, defense, and consumer applications are more sophisticated than ever before. Vivado® Design Suite, Vivado High-Level Synthesis accelerates IP creation by enabling C, C++ and System C specifications to be directly targeted into Xilinx All Programmable devices without the need to manually create RTL. Supporting both the ISE® and Vivado design environments Vivado HLS provides system and design architects alike with a faster path to IP creation by :

  • Abstraction of algorithmic description, data type specification (integer, fixed-point or floating-point) and interfaces (FIFO, AXI4, AXI4-Lite, AXI4-Stream)
  • Extensive libraries for arbitrary precision data types, video, DSP and more… see the below section under Libraries
  • Directives driven architecture-aware synthesis that delivers the best possible QoR
  • Fast time to QoR that rivals hand-coded RTL
  • Accelerated verification using C/C++ test bench simulation, automatic VHDL or Verilog simulation and test bench generation
  • Multi-language support and the broadest language coverage in the industry
  • Automatic use of Xilinx on-chip memories, DSP elements and floating-point library

Comprehensive Device Support

All 7 Series, Zynq®-7000 and UltraScale™ devices. Support older architectures as well for with ISE (*).

Vivado High-Level Synthesis is available stand alone or as part of the Vivado Design Suite System Edition.


The following libraries are included with Vivado HLS:

Name Description
Arbitrary Precision Data Types Integer and fixed-point (ap_cint.h, ap_int.h and systemc.h)  
HLS Stream Models for streaming data structures.  Designed to obtain best performance and area (hls_stream.h)
HLS Math Extensive support for the synthesis of the standard C (math.h) and C++ (cmath.h) math libraries.  The support includes floating point and fixed-point functions: abs, atan, atanf, atan2, atan2, ceil, ceilf, copysign, copysignf, cos, cosf, coshf, expf, fabs, fabsf, floorf, fmax, fmin, logf, fpclassify, isfinite, isinf, isnan, isnormal, log, log10, modf, modff, recip, recipf, round, rsqrt, rsqrtf, 1/sqrt, signbit, sin, sincos, sincosf, sinf, sinhf, sqrt, tan, tanf, trunc
HLS Video Video library to implement several aspects of modeling video design in C++ with  video Functions, specific data types, memory line buffer and memory window (hls_video.h). Through a data type hls::Mat, Vivado HLS is also compatible with existing OpenCV functions: AXIvideo2cvMat, AXIvideo2CvMat, AXIvideo2IplImage, cvMat2AXIvideo, CvMat2AXIvideo, cvMat2hlsMat, CvMat2hlsMat, CvMat2hlsWindow, hlsMat2cvMat, hlsMat2CvMat, hlsMat2IplImage, hlsWindow2CvMat, IplImage2AXIvideo, IplImage2hlsMat, AbsDiff, AddS, AddWeighted, And, Avg, AvgSdv, Cmp, CmpS, CornerHarris, CvtColor, Dilate, Duplicate, EqualizeHist, Erode, FASTX, Filter2D, GaussianBlur, Harris, HoughLines2, Integral, InitUndistortRectifyMap, Max, MaxS, Mean, Merge, Min, MinMaxLoc, MinS, Mul, Not, PaintMask, PyrDown, PyrUp, Range, Remap, Reduce, Resize, Set, Scale, Sobel, Split, SubRS, SubS, Sum, Threshold, Zero
HLS IP Integrate the LogiCORE IP FFT and FIR Compiler (hls_fft.h, hls_fir.h, ap_shift_reg.h)
HLS Linear Algebra
Support for the following functions: cholesky, cholesky_inverse, matrix_multiply, qrf, qr_inverse, svd (hls_linear_algebra.h)
HLS DSP Support for the following functions: atan2, awgn, cmpy, convolution_encoder, nco,  qam_demod, qam_mod, sqrt, viterbi_decoder (hls_dsp.h) 

Key Documents

For the most current links to Vivado High-Level Synthesis resources, use the Design Hub View in Vivado Document Navigator and select "High-Level Synthesis".

Name Description
WP416 Vivado Design Suite Vivado Design Suite Backgrounder
UG871Vivado Design Suite Tutorial High-Level Synthesis
UG902 Vivado Design Suite User Guide High-Level Synthesis
UG958 Vivado Design Suite Reference Guide Model-based DSP Design using System Generator

Application Notes

XAPP599 Floating Point Design with Vivado HLS
XAPP745 Processor Control of Vivado HLS Designs
XAPP793 Implementing Memory Structures for Video Processing
XAPP890 Zynq All Programmable SoC Sobel Filter Implementation 
XAPP1167 Accelerating OpenCV Applications with Zynq-7000 AP SoC using Vivado HLS Video Libraries

(*): Via additional license or with ISE Design Suite - System Edition.