Documentation/arch/arm/vfp/release-notes.rst

File Facts

System

Linux kernel

Corpus path

Documentation/arch/arm/vfp/release-notes.rst

Extension

.rst

Size

1319 bytes

Lines

58

Domain

Support Tooling And Documentation

Bucket

Documentation

Inferred role

Support Tooling And Documentation: documentation

Status

atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

===============================================
Release notes for Linux Kernel VFP support code
===============================================

Date: 	20 May 2004

Author:	Russell King

This is the first release of the Linux Kernel VFP support code.  It
provides support for the exceptions bounced from VFP hardware found
on ARM926EJ-S.

This release has been validated against the SoftFloat-2b library by
John R. Hauser using the TestFloat-2a test suite.  Details of this
library and test suite can be found at:

   http://www.jhauser.us/arithmetic/SoftFloat.html

The operations which have been tested with this package are:

 - fdiv
 - fsub
 - fadd
 - fmul
 - fcmp
 - fcmpe
 - fcvtd
 - fcvts
 - fsito
 - ftosi
 - fsqrt

All the above pass softfloat tests with the following exceptions:

- fadd/fsub shows some differences in the handling of +0 / -0 results
  when input operands differ in signs.
- the handling of underflow exceptions is slightly different.  If a
  result underflows before rounding, but becomes a normalised number
  after rounding, we do not signal an underflow exception.

Other operations which have been tested by basic assembly-only tests
are:

 - fcpy
 - fabs
 - fneg
 - ftoui
 - ftosiz
 - ftouiz

The combination operations have not been tested:

 - fmac
 - fnmac
 - fmsc
 - fnmsc
 - fnmul

Annotation

• Atlas domain: Support Tooling And Documentation / Documentation.
• Implementation status: atlas-only.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.