diff options
Diffstat (limited to 'kernel/Documentation/arm/VFP/release-notes.txt')
| -rw-r--r-- | kernel/Documentation/arm/VFP/release-notes.txt | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/kernel/Documentation/arm/VFP/release-notes.txt b/kernel/Documentation/arm/VFP/release-notes.txt new file mode 100644 index 000000000..28a279570 --- /dev/null +++ b/kernel/Documentation/arm/VFP/release-notes.txt @@ -0,0 +1,55 @@ +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 |