On 2015-07-24 13:14, Aurelien Jarno wrote: > The SH4 shad instruction can shift in both direction, depending on the > sign of the shift. This is currently implemented using branches, which > is not really efficient and prevents the optimizer to do its job. In > practice it is often used with a constant loaded in a register just > before. > > Simplify the implementation by computing both the value shifted to the > left and to the right, and then selecting the correct one with a > movcond. As with a negative value the shift amount can go up to 32 which > is undefined, we shift the value in two steps. > > Signed-off-by: Aurelien Jarno <aurel...@aurel32.net> > --- > target-sh4/translate.c | 53 > +++++++++++++++++++++----------------------------- > 1 file changed, 22 insertions(+), 31 deletions(-)
Despite the subject, this patch is of course also for 2.5. -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://www.aurel32.net
