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- 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
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