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tcg: Expand vector minmax using cmp+cmpsel 

Provide a generic fallback for the min/max operations.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2019-04-20 03:26:09 +00:00
parent 17f79944eb
commit 72b4c792c7
1 changed files with 16 additions and 4 deletions
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20
tcg/tcg-op-vec.c
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@ -120,6 +120,10 @@ bool tcg_can_emit_vecop_list(const TCGOpcode *list,
}
break;
case INDEX_op_cmpsel_vec:
case INDEX_op_smin_vec:
case INDEX_op_smax_vec:
case INDEX_op_umin_vec:
case INDEX_op_umax_vec:
if (tcg_can_emit_vec_op(INDEX_op_cmp_vec, type, vece)) {
continue;
}
@ -632,24 +636,32 @@ void tcg_gen_ussub_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
do_op3_nofail(vece, r, a, b, INDEX_op_ussub_vec);
}
static void do_minmax(unsigned vece, TCGv_vec r, TCGv_vec a,
TCGv_vec b, TCGOpcode opc, TCGCond cond)
{
if (!do_op3(vece, r, a, b, opc)) {
tcg_gen_cmpsel_vec(cond, vece, r, a, b, a, b);
}
}
void tcg_gen_smin_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3_nofail(vece, r, a, b, INDEX_op_smin_vec);
do_minmax(vece, r, a, b, INDEX_op_smin_vec, TCG_COND_LT);
}
void tcg_gen_umin_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3_nofail(vece, r, a, b, INDEX_op_umin_vec);
do_minmax(vece, r, a, b, INDEX_op_umin_vec, TCG_COND_LTU);
}
void tcg_gen_smax_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3_nofail(vece, r, a, b, INDEX_op_smax_vec);
do_minmax(vece, r, a, b, INDEX_op_smax_vec, TCG_COND_GT);
}
void tcg_gen_umax_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3_nofail(vece, r, a, b, INDEX_op_umax_vec);
do_minmax(vece, r, a, b, INDEX_op_umax_vec, TCG_COND_GTU);
}
void tcg_gen_shlv_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)