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| Filename | Latest commit message | Latest commit date |
|---|---|---|
6c59500c2d
NFP instruction set can fit small immediates into the instruction. Negative integers, however, will never fit because they will have highest bit set. If we swap the ALU op between ADD and SUB and negate the constant we have a better chance of fitting small negative integers into the instruction itself and saving one or two cycles. immed[gprB_21, 0xfffffffc] alu[gprA_4, gprA_4, +, gprB_21], gpr_wrboth immed[gprB_21, 0xffffffff] alu[gprA_5, gprA_5, +carry, gprB_21], gpr_wrboth now becomes: alu[gprA_4, gprA_4, -, 4], gpr_wrboth alu[gprA_5, gprA_5, -carry, 0], gpr_wrboth Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.