| 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 |