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1Release notes for Linux Kernel VFP support code
2-----------------------------------------------
3
4Date: 20 May 2004
5Author: Russell King
6
7This is the first release of the Linux Kernel VFP support code. It
8provides support for the exceptions bounced from VFP hardware found
9on ARM926EJ-S.
10
11This release has been validated against the SoftFloat-2b library by
12John R. Hauser using the TestFloat-2a test suite. Details of this
13library and test suite can be found at:
14
15 http://www.jhauser.us/arithmetic/SoftFloat.html
16
17The 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
31All 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
39Other operations which have been tested by basic assembly-only tests
40are:
41
42 - fcpy
43 - fabs
44 - fneg
45 - ftoui
46 - ftosiz
47 - ftouiz
48
49The combination operations have not been tested:
50
51 - fmac
52 - fnmac
53 - fmsc
54 - fnmsc
55 - fnmul