s390x/tcg: Implement VECTOR FP MULTIPLY

Very similar to VECTOR FP DIVIDE.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>

target/s390x/helper.h

@@ -282,6 +282,8 @@ DEF_HELPER_FLAGS_4(gvec_vfll32, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
 DEF_HELPER_FLAGS_4(gvec_vfll32s, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
 DEF_HELPER_FLAGS_4(gvec_vflr64, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
 DEF_HELPER_FLAGS_4(gvec_vflr64s, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfm64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfm64s, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
 
 #ifndef CONFIG_USER_ONLY
 DEF_HELPER_3(servc, i32, env, i64, i64)

target/s390x/insn-data.def

@@ -1234,6 +1234,8 @@
     F(0xe7c4, VFLL,    VRR_a, V,   0, 0, 0, 0, vfll, 0, IF_VEC)
 /* VECTOR LOAD ROUNDED */
     F(0xe7c5, VFLR,    VRR_a, V,   0, 0, 0, 0, vcdg, 0, IF_VEC)
+/* VECTOR FP MULTIPLY */
+    F(0xe7e7, VFM,     VRR_c, V,   0, 0, 0, 0, vfa, 0, IF_VEC)
 
 #ifndef CONFIG_USER_ONLY
 /* COMPARE AND SWAP AND PURGE */

target/s390x/translate_vx.inc.c

@@ -2563,6 +2563,9 @@ static DisasJumpType op_vfa(DisasContext *s, DisasOps *o)
     case 0xe5:
         fn = se ? gen_helper_gvec_vfd64s : gen_helper_gvec_vfd64;
         break;
+    case 0xe7:
+        fn = se ? gen_helper_gvec_vfm64s : gen_helper_gvec_vfm64;
+        break;
     default:
         g_assert_not_reached();
     }

target/s390x/vec_fpu_helper.c

@@ -487,3 +487,20 @@ void HELPER(gvec_vflr64s)(void *v1, const void *v2, CPUS390XState *env,
 
     vflr64(v1, v2, env, true, XxC, erm, GETPC());
 }
+
+static uint64_t vfm64(uint64_t a, uint64_t b, float_status *s)
+{
+    return float64_mul(a, b, s);
+}
+
+void HELPER(gvec_vfm64)(void *v1, const void *v2, const void *v3,
+                        CPUS390XState *env, uint32_t desc)
+{
+    vop64_3(v1, v2, v3, env, false, vfm64, GETPC());
+}
+
+void HELPER(gvec_vfm64s)(void *v1, const void *v2, const void *v3,
+                         CPUS390XState *env, uint32_t desc)
+{
+    vop64_3(v1, v2, v3, env, true, vfm64, GETPC());
+}