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s390x/tcg: Implement VECTOR SHIFT RIGHT ARITHMETIC 

Similar to VECTOR SHIFT LEFT ARITHMETIC. Add s390_vec_sar() similar to
s390_vec_shr().

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 11:41:47 +02:00
parent 0abddd6cbf
commit 5f724887e3
4 changed files with 48 additions and 0 deletions
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1
target/s390x/helper.h
View File

@ -205,6 +205,7 @@ DEF_HELPER_FLAGS_4(gvec_verll16, TCG_CALL_NO_RWG, void, ptr, cptr, i64, i32)
DEF_HELPER_FLAGS_4(gvec_verim8, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32)
DEF_HELPER_FLAGS_4(gvec_verim16, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32)
DEF_HELPER_FLAGS_4(gvec_vsl, TCG_CALL_NO_RWG, void, ptr, cptr, i64, i32)
DEF_HELPER_FLAGS_4(gvec_vsra, TCG_CALL_NO_RWG, void, ptr, cptr, i64, i32)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_3(servc, i32, env, i64, i64)

4
target/s390x/insn-data.def
View File

@ -1166,6 +1166,10 @@
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)
/* VECTOR SHIFT RIGHT ARITHMETIC */
F(0xe77e, VSRA, VRR_c, V, 0, 0, 0, 0, vsra, 0, IF_VEC)
/* VECTOR SHIFT RIGHT ARITHMETIC BY BYTE */
F(0xe77f, VSRAB, VRR_c, V, 0, 0, 0, 0, vsra, 0, IF_VEC)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

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

@ -2089,3 +2089,20 @@ static DisasJumpType op_vsldb(DisasContext *s, DisasOps *o)
tcg_temp_free(t2);
return DISAS_NEXT;
}
static DisasJumpType op_vsra(DisasContext *s, DisasOps *o)
{
TCGv_i64 shift = tcg_temp_new_i64();
read_vec_element_i64(shift, get_field(s->fields, v3), 7, ES_8);
if (s->fields->op2 == 0x7e) {
tcg_gen_andi_i64(shift, shift, 0x7);
} else {
tcg_gen_andi_i64(shift, shift, 0x78);
}
gen_gvec_2i_ool(get_field(s->fields, v1), get_field(s->fields, v2),
shift, 0, gen_helper_gvec_vsra);
tcg_temp_free_i64(shift);
return DISAS_NEXT;
}

26
target/s390x/vec_int_helper.c
View File

@ -49,6 +49,26 @@ static void s390_vec_shl(S390Vector *d, const S390Vector *a, uint64_t count)
}
}
static void s390_vec_sar(S390Vector *d, const S390Vector *a, uint64_t count)
{
uint64_t tmp;
if (count == 0) {
d->doubleword[0] = a->doubleword[0];
d->doubleword[1] = a->doubleword[1];
} else if (count == 64) {
d->doubleword[1] = a->doubleword[0];
d->doubleword[0] = 0;
} else if (count < 64) {
tmp = a->doubleword[1] >> count;
d->doubleword[1] = deposit64(tmp, 64 - count, count, a->doubleword[0]);
d->doubleword[0] = (int64_t)a->doubleword[0] >> count;
} else {
d->doubleword[1] = (int64_t)a->doubleword[0] >> (count - 64);
d->doubleword[0] = 0;
}
}
static void s390_vec_shr(S390Vector *d, const S390Vector *a, uint64_t count)
{
uint64_t tmp;
@ -535,3 +555,9 @@ void HELPER(gvec_vsl)(void *v1, const void *v2, uint64_t count,
{
s390_vec_shl(v1, v2, count);
}
void HELPER(gvec_vsra)(void *v1, const void *v2, uint64_t count,
uint32_t desc)
{
s390_vec_sar(v1, v2, count);
}