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tcg: Allow add_vec, sub_vec, neg_vec, not_vec to be expanded 

PowerPC Altivec does not support add and subtract of 64-bit elements.
Prepare for that configuration by not assuming the operation is
universally supported.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2019-03-16 21:44:56 +00:00
parent ac383dde33
commit ce27c5d1a3
1 changed files with 33 additions and 16 deletions
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49
tcg/tcg-op-vec.c
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@ -226,16 +226,6 @@ void tcg_gen_stl_vec(TCGv_vec r, TCGv_ptr b, TCGArg o, TCGType low_type)
vec_gen_3(INDEX_op_st_vec, low_type, 0, ri, bi, o);
}
void tcg_gen_add_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
vec_gen_op3(INDEX_op_add_vec, vece, r, a, b);
}
void tcg_gen_sub_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
vec_gen_op3(INDEX_op_sub_vec, vece, r, a, b);
}
void tcg_gen_and_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
vec_gen_op3(INDEX_op_and_vec, 0, r, a, b);
@ -296,11 +286,30 @@ void tcg_gen_eqv_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
tcg_gen_not_vec(0, r, r);
}
static bool do_op2(unsigned vece, TCGv_vec r, TCGv_vec a, TCGOpcode opc)
{
TCGTemp *rt = tcgv_vec_temp(r);
TCGTemp *at = tcgv_vec_temp(a);
TCGArg ri = temp_arg(rt);
TCGArg ai = temp_arg(at);
TCGType type = rt->base_type;
int can;
tcg_debug_assert(at->base_type >= type);
can = tcg_can_emit_vec_op(opc, type, vece);
if (can > 0) {
vec_gen_2(opc, type, vece, ri, ai);
} else if (can < 0) {
tcg_expand_vec_op(opc, type, vece, ri, ai);
} else {
return false;
}
return true;
}
void tcg_gen_not_vec(unsigned vece, TCGv_vec r, TCGv_vec a)
{
if (TCG_TARGET_HAS_not_vec) {
vec_gen_op2(INDEX_op_not_vec, 0, r, a);
} else {
if (!TCG_TARGET_HAS_not_vec || !do_op2(vece, r, a, INDEX_op_not_vec)) {
TCGv_vec t = tcg_const_ones_vec_matching(r);
tcg_gen_xor_vec(0, r, a, t);
tcg_temp_free_vec(t);
@ -309,9 +318,7 @@ void tcg_gen_not_vec(unsigned vece, TCGv_vec r, TCGv_vec a)
void tcg_gen_neg_vec(unsigned vece, TCGv_vec r, TCGv_vec a)
{
if (TCG_TARGET_HAS_neg_vec) {
vec_gen_op2(INDEX_op_neg_vec, vece, r, a);
} else {
if (!TCG_TARGET_HAS_neg_vec || !do_op2(vece, r, a, INDEX_op_neg_vec)) {
TCGv_vec t = tcg_const_zeros_vec_matching(r);
tcg_gen_sub_vec(vece, r, t, a);
tcg_temp_free_vec(t);
@ -409,6 +416,16 @@ static void do_op3(unsigned vece, TCGv_vec r, TCGv_vec a,
}
}
void tcg_gen_add_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3(vece, r, a, b, INDEX_op_add_vec);
}
void tcg_gen_sub_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3(vece, r, a, b, INDEX_op_sub_vec);
}
void tcg_gen_mul_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3(vece, r, a, b, INDEX_op_mul_vec);