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s390x/tcg: Implement VECTOR SHIFT LEFT DOUBLE BY BYTE

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Inline expansion courtesy of Richard H.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-04-11 11:39:23 +02:00
parent dea33fc31b
commit 0abddd6cbf
2 changed files with 31 additions and 0 deletions
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2
target/s390x/insn-data.def
View File

@ -1164,6 +1164,8 @@
F(0xe774, VSL, VRR_c, V, 0, 0, 0, 0, vsl, 0, IF_VEC)
/* VECTOR SHIFT LEFT BY BYTE */
F(0xe775, VSLB, VRR_c, V, 0, 0, 0, 0, vsl, 0, IF_VEC)
/* VECTOR SHIFT LEFT DOUBLE BY BYTE */
F(0xe777, VSLDB, VRI_d, V, 0, 0, 0, 0, vsldb, 0, IF_VEC)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

29
target/s390x/translate_vx.inc.c
View File

@ -2060,3 +2060,32 @@ static DisasJumpType op_vsl(DisasContext *s, DisasOps *o)
tcg_temp_free_i64(shift);
return DISAS_NEXT;
}
static DisasJumpType op_vsldb(DisasContext *s, DisasOps *o)
{
const uint8_t i4 = get_field(s->fields, i4) & 0xf;
const int left_shift = (i4 & 7) * 8;
const int right_shift = 64 - left_shift;
TCGv_i64 t0 = tcg_temp_new_i64();
TCGv_i64 t1 = tcg_temp_new_i64();
TCGv_i64 t2 = tcg_temp_new_i64();
if ((i4 & 8) == 0) {
read_vec_element_i64(t0, get_field(s->fields, v2), 0, ES_64);
read_vec_element_i64(t1, get_field(s->fields, v2), 1, ES_64);
read_vec_element_i64(t2, get_field(s->fields, v3), 0, ES_64);
} else {
read_vec_element_i64(t0, get_field(s->fields, v2), 1, ES_64);
read_vec_element_i64(t1, get_field(s->fields, v3), 0, ES_64);
read_vec_element_i64(t2, get_field(s->fields, v3), 1, ES_64);
}
tcg_gen_extract2_i64(t0, t1, t0, right_shift);
tcg_gen_extract2_i64(t1, t2, t1, right_shift);
write_vec_element_i64(t0, get_field(s->fields, v1), 0, ES_64);
write_vec_element_i64(t1, get_field(s->fields, v1), 1, ES_64);
tcg_temp_free(t0);
tcg_temp_free(t1);
tcg_temp_free(t2);
return DISAS_NEXT;
}