[Qemu-devel] [PULL 3/3] s390x: Add interlocked access facility 1 instructions

[Alexander Graf <agraf@suse.de>]

We're currently missing all instructions defined by the "interlocked-access
facility 1" which is part of zEC12. This patch implements all of them except
for LPD and LPDG.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
---
 target-s390x/insn-data.def | 16 ++++++++++++++++
 target-s390x/translate.c   | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/target-s390x/insn-data.def b/target-s390x/insn-data.def
index 48e979e..72c3a2e 100644
--- a/target-s390x/insn-data.def
+++ b/target-s390x/insn-data.def
@@ -359,6 +359,21 @@
     C(0xe371, LAY,     RXY_a, LD,  0, a2, 0, r1, mov2, 0)
 /* LOAD ADDRESS RELATIVE LONG */
     C(0xc000, LARL,    RIL_b, Z,   0, ri2, 0, r1, mov2, 0)
+/* LOAD AND ADD */
+    C(0xebf8, LAA,     RSY_a, ILA, r3_32s, m2_32s_atomic, new, m2_32_r1_atomic, add, adds32)
+    C(0xebe8, LAAG,    RSY_a, ILA, r3, m2_64_atomic, new, m2_64_r1_atomic, add, adds64)
+/* LOAD AND ADD LOGICAL */
+    C(0xebfa, LAAL,    RSY_a, ILA, r3_32s, m2_32s_atomic, new, m2_32_r1_atomic, add, addu32)
+    C(0xebea, LAALG,   RSY_a, ILA, r3, m2_64_atomic, new, m2_64_r1_atomic, add, addu64)
+/* LOAD AND AND */
+    C(0xebf4, LAN,     RSY_a, ILA, r3_32s, m2_32s_atomic, new, m2_32_r1_atomic, and, nz32)
+    C(0xebe4, LANG,    RSY_a, ILA, r3, m2_64_atomic, new, m2_64_r1_atomic, and, nz64)
+/* LOAD AND EXCLUSIVE OR */
+    C(0xebf7, LAX,     RSY_a, ILA, r3_32s, m2_32s_atomic, new, m2_32_r1_atomic, xor, nz32)
+    C(0xebe7, LAXG,    RSY_a, ILA, r3, m2_64_atomic, new, m2_64_r1_atomic, xor, nz64)
+/* LOAD AND OR */
+    C(0xebf6, LAO,     RSY_a, ILA, r3_32s, m2_32s_atomic, new, m2_32_r1_atomic, or, nz32)
+    C(0xebe6, LAOG,    RSY_a, ILA, r3, m2_64_atomic, new, m2_64_r1_atomic, or, nz64)
 /* LOAD AND TEST */
     C(0x1200, LTR,     RR_a,  Z,   0, r2_o, 0, cond_r1r2_32, mov2, s32)
     C(0xb902, LTGR,    RRE,   Z,   0, r2_o, 0, r1, mov2, s64)
@@ -438,6 +453,7 @@
     C(0xb9e2, LOCGR,   RRF_c, LOC, r1, r2, r1, 0, loc, 0)
     C(0xebf2, LOC,     RSY_b, LOC, r1, m2_32u, new, r1_32, loc, 0)
     C(0xebe2, LOCG,    RSY_b, LOC, r1, m2_64, r1, 0, loc, 0)
+/* LOAD PAIR DISJOINT TODO */
 /* LOAD POSITIVE */
     C(0x1000, LPR,     RR_a,  Z,   0, r2_32s, new, r1_32, abs, abs32)
     C(0xb900, LPGR,    RRE,   Z,   0, r2, r1, 0, abs, abs64)
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index fa3e334..80e3a54 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -1118,6 +1118,7 @@ typedef enum DisasFacility {
     FAC_PC,                 /* population count */
     FAC_SCF,                /* store clock fast */
     FAC_SFLE,               /* store facility list extended */
+    FAC_ILA,                /* interlocked access facility 1 */
 } DisasFacility;
 
 struct DisasInsn {
@@ -4065,6 +4066,22 @@ static void wout_m2_32(DisasContext *s, DisasFields *f, DisasOps *o)
 }
 #define SPEC_wout_m2_32 0
 
+static void wout_m2_32_r1_atomic(DisasContext *s, DisasFields *f, DisasOps *o)
+{
+    /* XXX release reservation */
+    tcg_gen_qemu_st32(o->out, o->addr1, get_mem_index(s));
+    store_reg32_i64(get_field(f, r1), o->in2);
+}
+#define SPEC_wout_m2_32_r1_atomic 0
+
+static void wout_m2_64_r1_atomic(DisasContext *s, DisasFields *f, DisasOps *o)
+{
+    /* XXX release reservation */
+    tcg_gen_qemu_st64(o->out, o->addr1, get_mem_index(s));
+    store_reg(get_field(f, r1), o->in2);
+}
+#define SPEC_wout_m2_64_r1_atomic 0
+
 /* ====================================================================== */
 /* The "INput 1" generators.  These load the first operand to an insn.  */
 
@@ -4486,6 +4503,24 @@ static void in2_mri2_64(DisasContext *s, DisasFields *f, DisasOps *o)
 }
 #define SPEC_in2_mri2_64 0
 
+static void in2_m2_32s_atomic(DisasContext *s, DisasFields *f, DisasOps *o)
+{
+    /* XXX should reserve the address */
+    in1_la2(s, f, o);
+    o->in2 = tcg_temp_new_i64();
+    tcg_gen_qemu_ld32s(o->in2, o->addr1, get_mem_index(s));
+}
+#define SPEC_in2_m2_32s_atomic 0
+
+static void in2_m2_64_atomic(DisasContext *s, DisasFields *f, DisasOps *o)
+{
+    /* XXX should reserve the address */
+    in1_la2(s, f, o);
+    o->in2 = tcg_temp_new_i64();
+    tcg_gen_qemu_ld64(o->in2, o->addr1, get_mem_index(s));
+}
+#define SPEC_in2_m2_64_atomic 0
+
 static void in2_i2(DisasContext *s, DisasFields *f, DisasOps *o)
 {
     o->in2 = tcg_const_i64(get_field(f, i2));
-- 
1.7.12.4