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<h1>ecdsalib</h1>

<h2>Core Description</h2>

<p>This is a library of code common to the ecdsa256 and ecdsa384 cores.  See documentation of those cores for details.</p>

<p>This code was originally repelicated in both of the above cores, but the Xilinx synthesis tools got tetchy about that when trying to build a single image containing both cores.</p>

<h2>Vendor-specific Primitives</h2>

<p>Cryptech Alpha platform is based on Xilinx Artix-7 200T FPGA, so this core takes advantage of Xilinx-specific DSP slices to carry out math-intensive operations. All vendor-specific math primitives are placed under /rtl/lowlevel/artix7, the core also offers generic replacements under /rtl/lowlevel/generic, they can be used for simulation with 3rd party tools, that are not aware of Xilinx-specific stuff. Selection of vendor/generic primitives is done in ecdsa_lowlevel_settings.v, when porting to other architectures, only those four low-level modules need to be ported.</p>
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