On Thu, 13 Jun 2019, Martin Jambor wrote: > architecture supports it. (and if IIUC, the intent is to use the 0 mode > from table 4-8 in > https://software.intel.com/sites/default/files/managed/39/c5/325462-sdm-vol-1-2abcd-3abcd.pdf > in instructions that take a rounding a mode to implement roundeven).
Note that the rounding mode argument to roundss / roundsd should end up as 8, not 0, so that the inexact exception is not raised. (8 here is the existing ROUND_NO_EXC definition in GCC. A new definition will need adding alongside ROUND_FLOOR, ROUND_CEIL and ROUND_TRUNC to correspond to rounding to nearest with ties to even, evaluating to 0.) -- Joseph S. Myers jos...@codesourcery.com
