On Dec 9, 2007, at 11:00 PM, Liu Yu wrote: > > This patch fixes rounding bug in emulation for double float > operating on PowerPC platform. > > When pack double float operand, it need to truncate the tail due to > the limited precision. > If the truncated part is not zero, the last bit of work bit (totally > 3 bits) need to '|' 1. > > This patch is completed in _FP_FRAC_SRS_2(X,N,sz) (arch/powerpc/math- > emu/op-2.h). > Originally the code leftwards rotates the operand to just keep the > truncated part, > then check whether it is zero. However, the number it rotates is not > correct when > N is not smaller than _FP_W_TYPE_SIZE, and it will cause the work > bit '|' 1 in the improper case. > > This patch fixes this issue. > > Signed-off-by: Liu Yu <[EMAIL PROTECTED]> > > --- > arch/powerpc/math-emu/op-2.h | 3 ++- > 1 files changed, 2 insertions(+), 1 deletions(-)
applied. - k _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
