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s390x/tcg: Implement VECTOR SUM ACROSS DOUBLEWORD

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Perform the calculations without a helper. Only 16 bit or 32 bit values
have to be added.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-04-10 22:48:25 +02:00
parent bc725e6515
commit fe2be36d26
2 changed files with 31 additions and 0 deletions
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2
target/s390x/insn-data.def
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@ -1182,6 +1182,8 @@
F(0xe7bf, VSBI, VRR_d, V, 0, 0, 0, 0, vsbi, 0, IF_VEC)
/* VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION */
F(0xe7bd, VSBCBI, VRR_d, V, 0, 0, 0, 0, vsbcbi, 0, IF_VEC)
/* VECTOR SUM ACROSS DOUBLEWORD */
F(0xe765, VSUMG, VRR_c, V, 0, 0, 0, 0, vsumg, 0, IF_VEC)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

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

@ -2252,3 +2252,32 @@ static DisasJumpType op_vsbcbi(DisasContext *s, DisasOps *o)
get_field(s->fields, v4));
return DISAS_NEXT;
}
static DisasJumpType op_vsumg(DisasContext *s, DisasOps *o)
{
const uint8_t es = get_field(s->fields, m4);
TCGv_i64 sum, tmp;
uint8_t dst_idx;
if (es == ES_8 || es > ES_32) {
gen_program_exception(s, PGM_SPECIFICATION);
return DISAS_NORETURN;
}
sum = tcg_temp_new_i64();
tmp = tcg_temp_new_i64();
for (dst_idx = 0; dst_idx < 2; dst_idx++) {
uint8_t idx = dst_idx * NUM_VEC_ELEMENTS(es) / 2;
const uint8_t max_idx = idx + NUM_VEC_ELEMENTS(es) / 2 - 1;
read_vec_element_i64(sum, get_field(s->fields, v3), max_idx, es);
for (; idx <= max_idx; idx++) {
read_vec_element_i64(tmp, get_field(s->fields, v2), idx, es);
tcg_gen_add_i64(sum, sum, tmp);
}
write_vec_element_i64(sum, get_field(s->fields, v1), dst_idx, ES_64);
}
tcg_temp_free_i64(sum);
tcg_temp_free_i64(tmp);
return DISAS_NEXT;
}