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tcg: Remove expansion to shift by vector from do_shifts

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We do not reflect this expansion in tcg_can_emit_vecop_list,
so it is unused and unusable. However, we actually perform
the same expansion in do_gvec_shifts, so it is also unneeded.

Backports commit 3d5bb2ea5cc9ed54f65a6929a6e6baa01cabd98b from qemu
This commit is contained in:
Richard Henderson 2020-06-14 21:50:43 -04:00 committed by Lioncash
parent be78062fd8
commit 2aa9d13120
1 changed files with 11 additions and 24 deletions
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35
qemu/tcg/tcg-op-vec.c
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@ -709,7 +709,7 @@ void tcg_gen_rotrv_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCG
}
static void do_shifts(TCGContext *tcg_ctx, unsigned vece, TCGv_vec r, TCGv_vec a,
TCGv_i32 s, TCGOpcode opc_s, TCGOpcode opc_v)
TCGv_i32 s, TCGOpcode opc)
{
TCGTemp *rt = tcgv_vec_temp(tcg_ctx, r);
TCGTemp *at = tcgv_vec_temp(tcg_ctx, a);
@ -718,48 +718,35 @@ static void do_shifts(TCGContext *tcg_ctx, unsigned vece, TCGv_vec r, TCGv_vec a
TCGArg ai = temp_arg(at);
TCGArg si = temp_arg(st);
TCGType type = rt->base_type;
const TCGOpcode *hold_list;
int can;
tcg_debug_assert(at->base_type >= type);
tcg_assert_listed_vecop(tcg_ctx, opc_s);
hold_list = tcg_swap_vecop_list(tcg_ctx, NULL);
can = tcg_can_emit_vec_op(opc_s, type, vece);
tcg_assert_listed_vecop(tcg_ctx, opc);
can = tcg_can_emit_vec_op(opc, type, vece);
if (can > 0) {
vec_gen_3(tcg_ctx, opc_s, type, vece, ri, ai, si);
vec_gen_3(tcg_ctx, opc, type, vece, ri, ai, si);
} else if (can < 0) {
tcg_expand_vec_op(tcg_ctx, opc_s, type, vece, ri, ai, si);
const TCGOpcode *hold_list = tcg_swap_vecop_list(tcg_ctx, NULL);
tcg_expand_vec_op(tcg_ctx, opc, type, vece, ri, ai, si);
tcg_swap_vecop_list(tcg_ctx, hold_list);
} else {
TCGv_vec vec_s = tcg_temp_new_vec(tcg_ctx, type);
if (vece == MO_64) {
TCGv_i64 s64 = tcg_temp_new_i64(tcg_ctx);
tcg_gen_extu_i32_i64(tcg_ctx, s64, s);
tcg_gen_dup_i64_vec(tcg_ctx, MO_64, vec_s, s64);
tcg_temp_free_i64(tcg_ctx, s64);
} else {
tcg_gen_dup_i32_vec(tcg_ctx, vece, vec_s, s);
}
do_op3_nofail(tcg_ctx, vece, r, a, vec_s, opc_v);
tcg_temp_free_vec(tcg_ctx, vec_s);
g_assert_not_reached();
}
tcg_swap_vecop_list(tcg_ctx, hold_list);
}
void tcg_gen_shls_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_i32 b)
{
do_shifts(s, vece, r, a, b, INDEX_op_shls_vec, INDEX_op_shlv_vec);
do_shifts(s, vece, r, a, b, INDEX_op_shls_vec);
}
void tcg_gen_shrs_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_i32 b)
{
do_shifts(s, vece, r, a, b, INDEX_op_shrs_vec, INDEX_op_shrv_vec);
do_shifts(s, vece, r, a, b, INDEX_op_shrs_vec);
}
void tcg_gen_sars_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_i32 b)
{
do_shifts(s, vece, r, a, b, INDEX_op_sars_vec, INDEX_op_sarv_vec);
do_shifts(s, vece, r, a, b, INDEX_op_sars_vec);
}
void tcg_gen_bitsel_vec(TCGContext *s, unsigned vece, TCGv_vec r, TCGv_vec a,