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Diffstat (limited to 'gcc/target.def')
| -rw-r--r-- | gcc/target.def | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/target.def b/gcc/target.def index 049dab6..f401fe1 100644 --- a/gcc/target.def +++ b/gcc/target.def @@ -1868,6 +1868,18 @@ correct for most targets.", poly_uint64, (const_tree type), default_preferred_vector_alignment) +/* Returns whether the target has a preference for decomposing divisions using + shifts rather than multiplies. */ +DEFHOOK +(preferred_div_as_shifts_over_mult, + "Sometimes it is possible to implement a vector division using a sequence\n\ +of two addition-shift pairs, giving four instructions in total.\n\ +Return true if taking this approach for @var{vectype} is likely\n\ +to be better than using a sequence involving highpart multiplication.\n\ +Default is false if @code{can_mult_highpart_p}, otherwise true.", + bool, (const_tree type), + default_preferred_div_as_shifts_over_mult) + /* Return true if vector alignment is reachable (by peeling N iterations) for the given scalar type. */ DEFHOOK |