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opensecura / 3p / lowrisc / opentitan / 4a932b2b5110ad6265d777a48681bcbdf2a09656 / . / sw / otbn / code-snippets
tree: 54ff74670a9fd406b7faf836539d5b57473f87b6 [path history] [tgz]
  1. barrett384.s
  2. err_test.s
  3. loop.s
  4. Makefile
  5. meson.build
  6. mul256.s
  7. mul384.s
  8. pseudo-ops.s
  9. randomness.s
  10. README.md
  11. rules.mk
sw/otbn/code-snippets/README.md

title: “OTBN Code Snippets”

This directory contains some code snippets that give examples of how to do various tasks in OTBN code.

  • modexp.s: An example of how to do modular exponentiation.
  • pseudo-ops.s: An example of the pseudo-operations supported by the OTBN ISA.
  • mul256.s: An example of a 256x256 bit multiply using the MULQACC instruction.
  • mul384.s: An example of a 384x384 bit multiply using the MULQACC instruction.
  • barrett384.s: An example of a modular multiplication kernel based on Barrett reduction.

Also included in this directory is a Makefile fragment that can be used to assemble and link the snippets. This can be used standalone or included in another Makefile.