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s390x/tcg: Implement VECTOR SUBTRACT 

We can use tcg_gen_sub2_i64() to do 128-bit subtraction and otherwise
existing gvec helpers.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
master
David Hildenbrand 2019-04-10 21:37:24 +02:00
parent 8112274f86
commit ea8d7840f5
2 changed files with 19 additions and 0 deletions
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2
target/s390x/insn-data.def
View File

@ -1174,6 +1174,8 @@
F(0xe77c, VSRL, VRR_c, V, 0, 0, 0, 0, vsrl, 0, IF_VEC)
/* VECTOR SHIFT RIGHT LOGICAL BY BYTE */
F(0xe77d, VSRLB, VRR_c, V, 0, 0, 0, 0, vsrl, 0, IF_VEC)
/* VECTOR SUBTRACT */
F(0xe7f7, VS, VRR_c, V, 0, 0, 0, 0, vs, 0, IF_VEC)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

17
target/s390x/translate_vx.inc.c
View File

@ -2123,3 +2123,20 @@ static DisasJumpType op_vsrl(DisasContext *s, DisasOps *o)
tcg_temp_free_i64(shift);
return DISAS_NEXT;
}
static DisasJumpType op_vs(DisasContext *s, DisasOps *o)
{
const uint8_t es = get_field(s->fields, m4);
if (es > ES_128) {
gen_program_exception(s, PGM_SPECIFICATION);
return DISAS_NORETURN;
} else if (es == ES_128) {
gen_gvec128_3_i64(tcg_gen_sub2_i64, get_field(s->fields, v1),
get_field(s->fields, v2), get_field(s->fields, v3));
return DISAS_NEXT;
}
gen_gvec_fn_3(sub, es, get_field(s->fields, v1), get_field(s->fields, v2),
get_field(s->fields, v3));
return DISAS_NEXT;
}