[Qemu-devel] [PULL v2 29/34] s390x/tcg: Implement VECTOR FP TEST DATA CLASS IMMEDIATE

[Cornelia Huck <cohuck@redhat.com>]

From: David Hildenbrand <david@redhat.com>

We can reuse float64_dcmask().

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 target/s390x/helper.h           |  2 ++
 target/s390x/insn-data.def      |  2 ++
 target/s390x/translate_vx.inc.c | 21 +++++++++++++++++++
 target/s390x/vec_fpu_helper.c   | 37 +++++++++++++++++++++++++++++++++
 4 files changed, 62 insertions(+)

diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index c788fc1b7fa2..e9aff83b05d3 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -292,6 +292,8 @@ DEF_HELPER_FLAGS_4(gvec_vfsq64, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
 DEF_HELPER_FLAGS_4(gvec_vfsq64s, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
 DEF_HELPER_FLAGS_5(gvec_vfs64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
 DEF_HELPER_FLAGS_5(gvec_vfs64s, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_4(gvec_vftci64, void, ptr, cptr, env, i32)
+DEF_HELPER_4(gvec_vftci64s, void, ptr, 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 4426f4025075..f421184fcd53 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1246,6 +1246,8 @@
     F(0xe7ce, VFSQ,    VRR_a, V,   0, 0, 0, 0, vfsq, 0, IF_VEC)
 /* VECTOR FP SUBTRACT */
     F(0xe7e2, VFS,     VRR_c, V,   0, 0, 0, 0, vfa, 0, IF_VEC)
+/* VECTOR FP TEST DATA CLASS IMMEDIATE */
+    F(0xe74a, VFTCI,   VRI_e, V,   0, 0, 0, 0, vftci, 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 c0a19aa9f3da..69c675e41187 100644
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -2801,3 +2801,24 @@ static DisasJumpType op_vfsq(DisasContext *s, DisasOps *o)
                    0, fn);
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vftci(DisasContext *s, DisasOps *o)
+{
+    const uint16_t i3 = get_field(s->fields, i3);
+    const uint8_t fpf = get_field(s->fields, m4);
+    const uint8_t m5 = get_field(s->fields, m5);
+    gen_helper_gvec_2_ptr *fn = gen_helper_gvec_vftci64;
+
+    if (fpf != FPF_LONG || extract32(m5, 0, 3)) {
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return DISAS_NORETURN;
+    }
+
+    if (extract32(m5, 3, 1)) {
+        fn = gen_helper_gvec_vftci64s;
+    }
+    gen_gvec_2_ptr(get_field(s->fields, v1), get_field(s->fields, v2), cpu_env,
+                   i3, fn);
+    set_cc_static(s);
+    return DISAS_NEXT;
+}
diff --git a/target/s390x/vec_fpu_helper.c b/target/s390x/vec_fpu_helper.c
index ccdc97562895..a48bd704bcad 100644
--- a/target/s390x/vec_fpu_helper.c
+++ b/target/s390x/vec_fpu_helper.c
@@ -586,3 +586,40 @@ void HELPER(gvec_vfs64s)(void *v1, const void *v2, const void *v3,
 {
     vop64_3(v1, v2, v3, env, true, vfs64, GETPC());
 }
+
+static int vftci64(S390Vector *v1, const S390Vector *v2, CPUS390XState *env,
+                   bool s, uint16_t i3)
+{
+    int i, match = 0;
+
+    for (i = 0; i < 2; i++) {
+        float64 a = s390_vec_read_element64(v2, i);
+
+        if (float64_dcmask(env, a) & i3) {
+            match++;
+            s390_vec_write_element64(v1, i, -1ull);
+        } else {
+            s390_vec_write_element64(v1, i, 0);
+        }
+        if (s) {
+            break;
+        }
+    }
+
+    if (match) {
+        return s || match == 2 ? 0 : 1;
+    }
+    return 3;
+}
+
+void HELPER(gvec_vftci64)(void *v1, const void *v2, CPUS390XState *env,
+                          uint32_t desc)
+{
+    env->cc_op = vftci64(v1, v2, env, false, simd_data(desc));
+}
+
+void HELPER(gvec_vftci64s)(void *v1, const void *v2, CPUS390XState *env,
+                           uint32_t desc)
+{
+    env->cc_op = vftci64(v1, v2, env, true, simd_data(desc));
+}
-- 
2.20.1