diff options
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index a060f1b..aac5693 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -7620,6 +7620,28 @@ simplify_context::lowpart_subreg (machine_mode outer_mode, rtx expr, subreg_lowpart_offset (outer_mode, inner_mode)); } +/* Generate RTX to select element at INDEX out of vector OP. */ + +rtx simplify_context::simplify_gen_vec_select (rtx op, unsigned int index) +{ + + if (!VECTOR_MODE_P (GET_MODE (op))) + return NULL_RTX; + + machine_mode imode = GET_MODE_INNER (GET_MODE (op)); + + if (index == 0) + { + rtx res = lowpart_subreg (imode, op, GET_MODE (op)); + if (res) + return res; + } + + rtx tmp = gen_rtx_PARALLEL (VOIDmode, gen_rtvec (1, GEN_INT (index))); + return gen_rtx_VEC_SELECT (imode, op, tmp); +} + + /* Simplify X, an rtx expression. Return the simplified expression or NULL if no simplifications |