Documentation/arm/VFP/release-notes.txt

   1 Release notes for Linux Kernel VFP support code
   2 -----------------------------------------------
   3
   4 Date:   20 May 2004
   5 Author: Russell King
   6
   7 This is the first release of the Linux Kernel VFP support code.  It
   8 provides support for the exceptions bounced from VFP hardware found
   9 on ARM926EJ-S.
  10
  11 This release has been validated against the SoftFloat-2b library by
  12 John R. Hauser using the TestFloat-2a test suite.  Details of this
  13 library and test suite can be found at:
  14
  15    http://www.jhauser.us/arithmetic/SoftFloat.html
  16
  17 The operations which have been tested with this package are:
  18
  19  - fdiv
  20  - fsub
  21  - fadd
  22  - fmul
  23  - fcmp
  24  - fcmpe
  25  - fcvtd
  26  - fcvts
  27  - fsito
  28  - ftosi
  29  - fsqrt
  30
  31 All the above pass softfloat tests with the following exceptions:
  32
  33 - fadd/fsub shows some differences in the handling of +0 / -0 results
  34   when input operands differ in signs.
  35 - the handling of underflow exceptions is slightly different.  If a
  36   result underflows before rounding, but becomes a normalised number
  37   after rounding, we do not signal an underflow exception.
  38
  39 Other operations which have been tested by basic assembly-only tests
  40 are:
  41
  42  - fcpy
  43  - fabs
  44  - fneg
  45  - ftoui
  46  - ftosiz
  47  - ftouiz
  48
  49 The combination operations have not been tested:
  50
  51  - fmac
  52  - fnmac
  53  - fmsc
  54  - fnmsc
  55  - fnmul