[Qemu-devel] [PULL 16/35] s390x/tcg: Implement VECTOR FP COMPARE (EQUAL|HIGH|HIGH OR EQUAL)

[Cornelia Huck <cohuck@redhat.com>]

From: David Hildenbrand <david@redhat.com>

Provide for all three instructions all four combinations of cc bit and
s bit.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 target/s390x/helper.h           |  12 ++++
 target/s390x/insn-data.def      |   6 ++
 target/s390x/translate_vx.inc.c |  51 ++++++++++++++++
 target/s390x/vec_fpu_helper.c   | 104 ++++++++++++++++++++++++++++++++
 4 files changed, 173 insertions(+)

diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index d34d6802a605..33d3bacf746e 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -254,6 +254,18 @@ DEF_HELPER_FLAGS_5(gvec_vfa64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
 DEF_HELPER_FLAGS_5(gvec_vfa64s, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
 DEF_HELPER_4(gvec_wfc64, void, cptr, cptr, env, i32)
 DEF_HELPER_4(gvec_wfk64, void, cptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfce64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfce64s, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_5(gvec_vfce64_cc, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_5(gvec_vfce64s_cc, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfch64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfch64s, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_5(gvec_vfch64_cc, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_5(gvec_vfch64s_cc, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfche64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfche64s, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_5(gvec_vfche64_cc, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_5(gvec_vfche64s_cc, void, ptr, cptr, cptr, env, i32)
 
 #ifndef CONFIG_USER_ONLY
 DEF_HELPER_3(servc, i32, env, i64, i64)
diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index c45e101b1056..446552f2510e 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1212,6 +1212,12 @@
     F(0xe7cb, WFC,     VRR_a, V,   0, 0, 0, 0, wfc, 0, IF_VEC)
 /* VECTOR FP COMPARE AND SIGNAL SCALAR */
     F(0xe7ca, WFK,     VRR_a, V,   0, 0, 0, 0, wfc, 0, IF_VEC)
+/* VECTOR FP COMPARE EQUAL */
+    F(0xe7e8, VFCE,    VRR_c, V,   0, 0, 0, 0, vfc, 0, IF_VEC)
+/* VECTOR FP COMPARE HIGH */
+    F(0xe7eb, VFCH,    VRR_c, V,   0, 0, 0, 0, vfc, 0, IF_VEC)
+/* VECTOR FP COMPARE HIGH OR EQUAL */
+    F(0xe7ea, VFCHE,   VRR_c, V,   0, 0, 0, 0, vfc, 0, IF_VEC)
 
 #ifndef CONFIG_USER_ONLY
 /* COMPARE AND SWAP AND PURGE */
diff --git a/target/s390x/translate_vx.inc.c b/target/s390x/translate_vx.inc.c
index 283e8aa07ae4..5571a71e1a48 100644
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -2588,3 +2588,54 @@ static DisasJumpType op_wfc(DisasContext *s, DisasOps *o)
     set_cc_static(s);
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vfc(DisasContext *s, DisasOps *o)
+{
+    const uint8_t fpf = get_field(s->fields, m4);
+    const uint8_t m5 = get_field(s->fields, m5);
+    const uint8_t m6 = get_field(s->fields, m6);
+    const bool se = extract32(m5, 3, 1);
+    const bool cs = extract32(m6, 0, 1);
+    gen_helper_gvec_3_ptr *fn;
+
+    if (fpf != FPF_LONG || extract32(m5, 0, 3) || extract32(m6, 1, 3)) {
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return DISAS_NORETURN;
+    }
+
+    if (cs) {
+        switch (s->fields->op2) {
+        case 0xe8:
+            fn = se ? gen_helper_gvec_vfce64s_cc : gen_helper_gvec_vfce64_cc;
+            break;
+        case 0xeb:
+            fn = se ? gen_helper_gvec_vfch64s_cc : gen_helper_gvec_vfch64_cc;
+            break;
+        case 0xea:
+            fn = se ? gen_helper_gvec_vfche64s_cc : gen_helper_gvec_vfche64_cc;
+            break;
+        default:
+            g_assert_not_reached();
+        }
+    } else {
+        switch (s->fields->op2) {
+        case 0xe8:
+            fn = se ? gen_helper_gvec_vfce64s : gen_helper_gvec_vfce64;
+            break;
+        case 0xeb:
+            fn = se ? gen_helper_gvec_vfch64s : gen_helper_gvec_vfch64;
+            break;
+        case 0xea:
+            fn = se ? gen_helper_gvec_vfche64s : gen_helper_gvec_vfche64;
+            break;
+        default:
+            g_assert_not_reached();
+        }
+    }
+    gen_gvec_3_ptr(get_field(s->fields, v1), get_field(s->fields, v2),
+                   get_field(s->fields, v3), cpu_env, 0, fn);
+    if (cs) {
+        set_cc_static(s);
+    }
+    return DISAS_NEXT;
+}
diff --git a/target/s390x/vec_fpu_helper.c b/target/s390x/vec_fpu_helper.c
index f9357d922103..e72500d4d55e 100644
--- a/target/s390x/vec_fpu_helper.c
+++ b/target/s390x/vec_fpu_helper.c
@@ -149,3 +149,107 @@ void HELPER(gvec_wfk64)(const void *v1, const void *v2, CPUS390XState *env,
 {
     env->cc_op = wfc64(v1, v2, env, true, GETPC());
 }
+
+typedef int (*vfc64_fn)(float64 a, float64 b, float_status *status);
+static int vfc64(S390Vector *v1, const S390Vector *v2, const S390Vector *v3,
+                 CPUS390XState *env, bool s, vfc64_fn fn, uintptr_t retaddr)
+{
+    uint8_t vxc, vec_exc = 0;
+    S390Vector tmp = {};
+    int match = 0;
+    int i;
+
+    for (i = 0; i < 2; i++) {
+        const float64 a = s390_vec_read_element64(v2, i);
+        const float64 b = s390_vec_read_element64(v3, i);
+
+        /* swap the order of the parameters, so we can use existing functions */
+        if (fn(b, a, &env->fpu_status)) {
+            match++;
+            s390_vec_write_element64(&tmp, i, -1ull);
+        }
+        vxc = check_ieee_exc(env, i, false, &vec_exc);
+        if (s || vxc) {
+            break;
+        }
+    }
+
+    handle_ieee_exc(env, vxc, vec_exc, retaddr);
+    *v1 = tmp;
+    if (match) {
+        return s || match == 2 ? 0 : 1;
+    }
+    return 3;
+}
+
+void HELPER(gvec_vfce64)(void *v1, const void *v2, const void *v3,
+                         CPUS390XState *env, uint32_t desc)
+{
+    vfc64(v1, v2, v3, env, false, float64_eq_quiet, GETPC());
+}
+
+void HELPER(gvec_vfce64s)(void *v1, const void *v2, const void *v3,
+                          CPUS390XState *env, uint32_t desc)
+{
+    vfc64(v1, v2, v3, env, true, float64_eq_quiet, GETPC());
+}
+
+void HELPER(gvec_vfce64_cc)(void *v1, const void *v2, const void *v3,
+                            CPUS390XState *env, uint32_t desc)
+{
+    env->cc_op = vfc64(v1, v2, v3, env, false, float64_eq_quiet, GETPC());
+}
+
+void HELPER(gvec_vfce64s_cc)(void *v1, const void *v2, const void *v3,
+                            CPUS390XState *env, uint32_t desc)
+{
+    env->cc_op = vfc64(v1, v2, v3, env, true, float64_eq_quiet, GETPC());
+}
+
+void HELPER(gvec_vfch64)(void *v1, const void *v2, const void *v3,
+                         CPUS390XState *env, uint32_t desc)
+{
+    vfc64(v1, v2, v3, env, false, float64_lt_quiet, GETPC());
+}
+
+void HELPER(gvec_vfch64s)(void *v1, const void *v2, const void *v3,
+                          CPUS390XState *env, uint32_t desc)
+{
+    vfc64(v1, v2, v3, env, true, float64_lt_quiet, GETPC());
+}
+
+void HELPER(gvec_vfch64_cc)(void *v1, const void *v2, const void *v3,
+                            CPUS390XState *env, uint32_t desc)
+{
+    env->cc_op = vfc64(v1, v2, v3, env, false, float64_lt_quiet, GETPC());
+}
+
+void HELPER(gvec_vfch64s_cc)(void *v1, const void *v2, const void *v3,
+                             CPUS390XState *env, uint32_t desc)
+{
+    env->cc_op = vfc64(v1, v2, v3, env, true, float64_lt_quiet, GETPC());
+}
+
+void HELPER(gvec_vfche64)(void *v1, const void *v2, const void *v3,
+                          CPUS390XState *env, uint32_t desc)
+{
+    vfc64(v1, v2, v3, env, false, float64_le_quiet, GETPC());
+}
+
+void HELPER(gvec_vfche64s)(void *v1, const void *v2, const void *v3,
+                           CPUS390XState *env, uint32_t desc)
+{
+    vfc64(v1, v2, v3, env, true, float64_le_quiet, GETPC());
+}
+
+void HELPER(gvec_vfche64_cc)(void *v1, const void *v2, const void *v3,
+                             CPUS390XState *env, uint32_t desc)
+{
+    env->cc_op = vfc64(v1, v2, v3, env, false, float64_le_quiet, GETPC());
+}
+
+void HELPER(gvec_vfche64s_cc)(void *v1, const void *v2, const void *v3,
+                              CPUS390XState *env, uint32_t desc)
+{
+    env->cc_op = vfc64(v1, v2, v3, env, true, float64_le_quiet, GETPC());
+}
-- 
2.20.1