1*4882a593Smuzhiyun=============================================== 2*4882a593SmuzhiyunRelease notes for Linux Kernel VFP support code 3*4882a593Smuzhiyun=============================================== 4*4882a593Smuzhiyun 5*4882a593SmuzhiyunDate: 20 May 2004 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunAuthor: Russell King 8*4882a593Smuzhiyun 9*4882a593SmuzhiyunThis is the first release of the Linux Kernel VFP support code. It 10*4882a593Smuzhiyunprovides support for the exceptions bounced from VFP hardware found 11*4882a593Smuzhiyunon ARM926EJ-S. 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunThis release has been validated against the SoftFloat-2b library by 14*4882a593SmuzhiyunJohn R. Hauser using the TestFloat-2a test suite. Details of this 15*4882a593Smuzhiyunlibrary and test suite can be found at: 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun http://www.jhauser.us/arithmetic/SoftFloat.html 18*4882a593Smuzhiyun 19*4882a593SmuzhiyunThe operations which have been tested with this package are: 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun - fdiv 22*4882a593Smuzhiyun - fsub 23*4882a593Smuzhiyun - fadd 24*4882a593Smuzhiyun - fmul 25*4882a593Smuzhiyun - fcmp 26*4882a593Smuzhiyun - fcmpe 27*4882a593Smuzhiyun - fcvtd 28*4882a593Smuzhiyun - fcvts 29*4882a593Smuzhiyun - fsito 30*4882a593Smuzhiyun - ftosi 31*4882a593Smuzhiyun - fsqrt 32*4882a593Smuzhiyun 33*4882a593SmuzhiyunAll the above pass softfloat tests with the following exceptions: 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun- fadd/fsub shows some differences in the handling of +0 / -0 results 36*4882a593Smuzhiyun when input operands differ in signs. 37*4882a593Smuzhiyun- the handling of underflow exceptions is slightly different. If a 38*4882a593Smuzhiyun result underflows before rounding, but becomes a normalised number 39*4882a593Smuzhiyun after rounding, we do not signal an underflow exception. 40*4882a593Smuzhiyun 41*4882a593SmuzhiyunOther operations which have been tested by basic assembly-only tests 42*4882a593Smuzhiyunare: 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun - fcpy 45*4882a593Smuzhiyun - fabs 46*4882a593Smuzhiyun - fneg 47*4882a593Smuzhiyun - ftoui 48*4882a593Smuzhiyun - ftosiz 49*4882a593Smuzhiyun - ftouiz 50*4882a593Smuzhiyun 51*4882a593SmuzhiyunThe combination operations have not been tested: 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun - fmac 54*4882a593Smuzhiyun - fnmac 55*4882a593Smuzhiyun - fmsc 56*4882a593Smuzhiyun - fnmsc 57*4882a593Smuzhiyun - fnmul 58