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s390x/tcg: implement Interlocked-Access Facility 2 

With this facility, OI/OIY, NI/NIY and XI/XIY are atomic. All operate on
one byte (MO_UB). Emulate old behavior.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20171208160207.26494-8-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
master
David Hildenbrand 2017-12-08 17:02:00 +01:00 committed by Cornelia Huck
parent 0e9383bca8
commit f400be1813
3 changed files with 70 additions and 6 deletions
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1
target/s390x/cpu_models.c
View File

@ -842,6 +842,7 @@ static void add_qemu_cpu_model_features(S390FeatBitmap fbm)
S390_FEAT_STFLE_45,
S390_FEAT_STFLE_49,
S390_FEAT_LOCAL_TLB_CLEARING,
S390_FEAT_INTERLOCKED_ACCESS_2,
S390_FEAT_STFLE_53,
S390_FEAT_MSA_EXT_5,
S390_FEAT_MSA_EXT_3,

12
target/s390x/insn-data.def
View File

@ -99,8 +99,8 @@
D(0xa505, NIHL, RI_a, Z, r1_o, i2_16u, r1, 0, andi, 0, 0x1020)
D(0xa506, NILH, RI_a, Z, r1_o, i2_16u, r1, 0, andi, 0, 0x1010)
D(0xa507, NILL, RI_a, Z, r1_o, i2_16u, r1, 0, andi, 0, 0x1000)
C(0x9400, NI, SI, Z, m1_8u, i2_8u, new, m1_8, and, nz64)
C(0xeb54, NIY, SIY, LD, m1_8u, i2_8u, new, m1_8, and, nz64)
D(0x9400, NI, SI, Z, la1, i2_8u, new, 0, ni, nz64, MO_UB)
D(0xeb54, NIY, SIY, LD, la1, i2_8u, new, 0, ni, nz64, MO_UB)
/* BRANCH AND SAVE */
C(0x0d00, BASR, RR_a, Z, 0, r2_nz, r1, 0, bas, 0)
@ -357,8 +357,8 @@
/* EXCLUSIVE OR IMMEDIATE */
D(0xc006, XIHF, RIL_a, EI, r1_o, i2_32u, r1, 0, xori, 0, 0x2020)
D(0xc007, XILF, RIL_a, EI, r1_o, i2_32u, r1, 0, xori, 0, 0x2000)
C(0x9700, XI, SI, Z, m1_8u, i2_8u, new, m1_8, xor, nz64)
C(0xeb57, XIY, SIY, LD, m1_8u, i2_8u, new, m1_8, xor, nz64)
D(0x9700, XI, SI, Z, la1, i2_8u, new, 0, xi, nz64, MO_UB)
D(0xeb57, XIY, SIY, LD, la1, i2_8u, new, 0, xi, nz64, MO_UB)
/* EXECUTE */
C(0x4400, EX, RX_a, Z, 0, a2, 0, 0, ex, 0)
@ -698,8 +698,8 @@
D(0xa509, OIHL, RI_a, Z, r1_o, i2_16u, r1, 0, ori, 0, 0x1020)
D(0xa50a, OILH, RI_a, Z, r1_o, i2_16u, r1, 0, ori, 0, 0x1010)
D(0xa50b, OILL, RI_a, Z, r1_o, i2_16u, r1, 0, ori, 0, 0x1000)
C(0x9600, OI, SI, Z, m1_8u, i2_8u, new, m1_8, or, nz64)
C(0xeb56, OIY, SIY, LD, m1_8u, i2_8u, new, m1_8, or, nz64)
D(0x9600, OI, SI, Z, la1, i2_8u, new, 0, oi, nz64, MO_UB)
D(0xeb56, OIY, SIY, LD, la1, i2_8u, new, 0, oi, nz64, MO_UB)
/* PACK */
/* Really format SS_b, but we pack both lengths into one argument

63
target/s390x/translate.c
View File

@ -1427,6 +1427,27 @@ static ExitStatus op_andi(DisasContext *s, DisasOps *o)
return NO_EXIT;
}
static ExitStatus op_ni(DisasContext *s, DisasOps *o)
{
o->in1 = tcg_temp_new_i64();
if (!s390_has_feat(S390_FEAT_INTERLOCKED_ACCESS_2)) {
tcg_gen_qemu_ld_tl(o->in1, o->addr1, get_mem_index(s), s->insn->data);
} else {
/* Perform the atomic operation in memory. */
tcg_gen_atomic_fetch_and_i64(o->in1, o->addr1, o->in2, get_mem_index(s),
s->insn->data);
}
/* Recompute also for atomic case: needed for setting CC. */
tcg_gen_and_i64(o->out, o->in1, o->in2);
if (!s390_has_feat(S390_FEAT_INTERLOCKED_ACCESS_2)) {
tcg_gen_qemu_st_tl(o->out, o->addr1, get_mem_index(s), s->insn->data);
}
return NO_EXIT;
}
static ExitStatus op_bas(DisasContext *s, DisasOps *o)
{
tcg_gen_movi_i64(o->out, pc_to_link_info(s, s->next_pc));
@ -3378,6 +3399,27 @@ static ExitStatus op_ori(DisasContext *s, DisasOps *o)
return NO_EXIT;
}
static ExitStatus op_oi(DisasContext *s, DisasOps *o)
{
o->in1 = tcg_temp_new_i64();
if (!s390_has_feat(S390_FEAT_INTERLOCKED_ACCESS_2)) {
tcg_gen_qemu_ld_tl(o->in1, o->addr1, get_mem_index(s), s->insn->data);
} else {
/* Perform the atomic operation in memory. */
tcg_gen_atomic_fetch_or_i64(o->in1, o->addr1, o->in2, get_mem_index(s),
s->insn->data);
}
/* Recompute also for atomic case: needed for setting CC. */
tcg_gen_or_i64(o->out, o->in1, o->in2);
if (!s390_has_feat(S390_FEAT_INTERLOCKED_ACCESS_2)) {
tcg_gen_qemu_st_tl(o->out, o->addr1, get_mem_index(s), s->insn->data);
}
return NO_EXIT;
}
static ExitStatus op_pack(DisasContext *s, DisasOps *o)
{
TCGv_i32 l = tcg_const_i32(get_field(s->fields, l1));
@ -4643,6 +4685,27 @@ static ExitStatus op_xori(DisasContext *s, DisasOps *o)
return NO_EXIT;
}
static ExitStatus op_xi(DisasContext *s, DisasOps *o)
{
o->in1 = tcg_temp_new_i64();
if (!s390_has_feat(S390_FEAT_INTERLOCKED_ACCESS_2)) {
tcg_gen_qemu_ld_tl(o->in1, o->addr1, get_mem_index(s), s->insn->data);
} else {
/* Perform the atomic operation in memory. */
tcg_gen_atomic_fetch_xor_i64(o->in1, o->addr1, o->in2, get_mem_index(s),
s->insn->data);
}
/* Recompute also for atomic case: needed for setting CC. */
tcg_gen_xor_i64(o->out, o->in1, o->in2);
if (!s390_has_feat(S390_FEAT_INTERLOCKED_ACCESS_2)) {
tcg_gen_qemu_st_tl(o->out, o->addr1, get_mem_index(s), s->insn->data);
}
return NO_EXIT;
}
static ExitStatus op_zero(DisasContext *s, DisasOps *o)
{
o->out = tcg_const_i64(0);