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Michael Brown
127d8fd40e
Use the tighter provable constraint
carry.2^n + x <= (2^n - 1) + (2^n - 1)
<= 2^n + (2^n - 2)
and so
x + carry <= (2^n - 2) + 1
<= (2^n - 1)
to eliminate some unnecessary folding steps, and hold the folded value
in the most significant bits of the register rather than the least
significant bits so that the final one's complement negation can be
accomplished naturally without requiring an explicit 0xffff constant.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE network bootloader
iPXE is the leading open source network boot firmware. It provides a full PXE implementation enhanced with additional features such as:
-
boot from a web server via HTTP or HTTPS,
-
boot from an iSCSI, FCoE, or AoE SAN,
-
control the boot process with a script,
You can use iPXE to replace the existing PXE ROM on your network card, or you can chainload into iPXE to obtain the features of iPXE without the hassle of reflashing.
iPXE is free, open-source software licensed under the GNU GPL (with some portions under GPL-compatible licences).
You can download the rolling release binaries (built from the latest commit), or use the most recent stable release.
For full documentation, visit the iPXE website.