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

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

Backports commit ce27c5d1a38e93da38653af71fb468c5eded4c7b from qemu
This commit is contained in:
Richard Henderson 2019-05-16 14:32:23 -04:00 committed by Lioncash
parent 9a9b681b38
commit 37762fd92b
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 33 additions and 12 deletions
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45
qemu/tcg/tcg-op-vec.c
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@ -227,16 +227,6 @@ void tcg_gen_stl_vec(TCGContext *s, TCGv_vec r, TCGv_ptr b, TCGArg o, TCGType lo
vec_gen_3(s, INDEX_op_st_vec, low_type, 0, ri, bi, o);
}
void tcg_gen_add_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
vec_gen_op3(s, INDEX_op_add_vec, vece, r, a, b);
}
void tcg_gen_sub_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
vec_gen_op3(s, INDEX_op_sub_vec, vece, r, a, b);
}
void tcg_gen_and_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
vec_gen_op3(s, INDEX_op_and_vec, 0, r, a, b);
@ -297,9 +287,30 @@ void tcg_gen_eqv_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_
tcg_gen_not_vec(s, 0, r, r);
}
static bool do_op2(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGOpcode opc)
{
TCGTemp *rt = tcgv_vec_temp(s, r);
TCGTemp *at = tcgv_vec_temp(s, 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(s, opc, type, vece, ri, ai);
} else if (can < 0) {
tcg_expand_vec_op(s, opc, type, vece, ri, ai);
} else {
return false;
}
return true;
}
void tcg_gen_not_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a)
{
if (TCG_TARGET_HAS_not_vec) {
if (!TCG_TARGET_HAS_not_vec || !do_op2(s, vece, r, a, INDEX_op_not_vec)) {
vec_gen_op2(s, INDEX_op_not_vec, 0, r, a);
} else {
TCGv_vec t = tcg_const_ones_vec_matching(s, r);
@ -310,7 +321,7 @@ void tcg_gen_not_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a)
void tcg_gen_neg_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a)
{
if (TCG_TARGET_HAS_neg_vec) {
if (!TCG_TARGET_HAS_neg_vec || !do_op2(s, vece, r, a, INDEX_op_neg_vec)) {
vec_gen_op2(s, INDEX_op_neg_vec, vece, r, a);
} else {
TCGv_vec t = tcg_const_zeros_vec_matching(s, r);
@ -410,6 +421,16 @@ static void do_op3(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a,
}
}
void tcg_gen_add_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3(s, vece, r, a, b, INDEX_op_add_vec);
}
void tcg_gen_sub_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3(s, vece, r, a, b, INDEX_op_sub_vec);
}
void tcg_gen_mul_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b)
{
do_op3(s, vece, r, a, b, INDEX_op_mul_vec);