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s390x/tcg: Implement VECTOR LOAD GR FROM VR ELEMENT 

To avoid an helper, we have to do the actual calculation of the element
address (offset in cpu_env + cpu_env) manually. Factor that out into
get_vec_element_ptr_i64(). The same logic will be reused for "VECTOR
LOAD VR ELEMENT FROM GR".

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190307121539.12842-12-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
master
David Hildenbrand 2019-03-07 13:15:18 +01:00 committed by Cornelia Huck
parent e6790d3211
commit 5d203bea59
2 changed files with 65 additions and 0 deletions
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2
target/s390x/insn-data.def
View File

@ -996,6 +996,8 @@
E(0xe741, VLEIH, VRI_a, V, 0, 0, 0, 0, vlei, 0, ES_16, IF_VEC)
E(0xe743, VLEIF, VRI_a, V, 0, 0, 0, 0, vlei, 0, ES_32, IF_VEC)
E(0xe742, VLEIG, VRI_a, V, 0, 0, 0, 0, vlei, 0, ES_64, IF_VEC)
/* VECTOR LOAD GR FROM VR ELEMENT */
F(0xe721, VLGV, VRS_c, V, la2, 0, r1, 0, vlgv, 0, IF_VEC)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

63
target/s390x/translate_vx.inc.c
View File

@ -113,6 +113,28 @@ static void write_vec_element_i64(TCGv_i64 src, int reg, uint8_t enr,
}
}
static void get_vec_element_ptr_i64(TCGv_ptr ptr, uint8_t reg, TCGv_i64 enr,
uint8_t es)
{
TCGv_i64 tmp = tcg_temp_new_i64();
/* mask off invalid parts from the element nr */
tcg_gen_andi_i64(tmp, enr, NUM_VEC_ELEMENTS(es) - 1);
/* convert it to an element offset relative to cpu_env (vec_reg_offset() */
tcg_gen_shli_i64(tmp, tmp, es);
#ifndef HOST_WORDS_BIGENDIAN
tcg_gen_xori_i64(tmp, tmp, 8 - NUM_VEC_ELEMENT_BYTES(es));
#endif
tcg_gen_addi_i64(tmp, tmp, vec_full_reg_offset(reg));
/* generate the final ptr by adding cpu_env */
tcg_gen_trunc_i64_ptr(ptr, tmp);
tcg_gen_add_ptr(ptr, ptr, cpu_env);
tcg_temp_free_i64(tmp);
}
#define gen_gvec_dup_i64(es, v1, c) \
tcg_gen_gvec_dup_i64(es, vec_full_reg_offset(v1), 16, 16, c)
#define gen_gvec_mov(v1, v2) \
@ -297,3 +319,44 @@ static DisasJumpType op_vlei(DisasContext *s, DisasOps *o)
tcg_temp_free_i64(tmp);
return DISAS_NEXT;
}
static DisasJumpType op_vlgv(DisasContext *s, DisasOps *o)
{
const uint8_t es = get_field(s->fields, m4);
TCGv_ptr ptr;
if (es > ES_64) {
gen_program_exception(s, PGM_SPECIFICATION);
return DISAS_NORETURN;
}
/* fast path if we don't need the register content */
if (!get_field(s->fields, b2)) {
uint8_t enr = get_field(s->fields, d2) & (NUM_VEC_ELEMENTS(es) - 1);
read_vec_element_i64(o->out, get_field(s->fields, v3), enr, es);
return DISAS_NEXT;
}
ptr = tcg_temp_new_ptr();
get_vec_element_ptr_i64(ptr, get_field(s->fields, v3), o->addr1, es);
switch (es) {
case ES_8:
tcg_gen_ld8u_i64(o->out, ptr, 0);
break;
case ES_16:
tcg_gen_ld16u_i64(o->out, ptr, 0);
break;
case ES_32:
tcg_gen_ld32u_i64(o->out, ptr, 0);
break;
case ES_64:
tcg_gen_ld_i64(o->out, ptr, 0);
break;
default:
g_assert_not_reached();
}
tcg_temp_free_ptr(ptr);
return DISAS_NEXT;
}