s390x/tcg: Implement VECTOR FP DIVIDE

We can reuse most of the infrastructure added for VECTOR FP ADD.

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

target/s390x/helper.h

@@ -274,6 +274,8 @@ DEF_HELPER_FLAGS_4(gvec_vcgd64, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
 DEF_HELPER_FLAGS_4(gvec_vcgd64s, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
 DEF_HELPER_FLAGS_4(gvec_vclgd64, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
 DEF_HELPER_FLAGS_4(gvec_vclgd64s, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfd64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, env, i32)
+DEF_HELPER_FLAGS_5(gvec_vfd64s, 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

@@ -1226,6 +1226,8 @@
     F(0xe7c2, VCGD,    VRR_a, V,   0, 0, 0, 0, vcdg, 0, IF_VEC)
 /* VECTOR FP CONVERT TO LOGICAL 64-BIT */
     F(0xe7c0, VCLGD,   VRR_a, V,   0, 0, 0, 0, vcdg, 0, IF_VEC)
+/* VECTOR FP DIVIDE */
+    F(0xe7e5, VFD,     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

@@ -2560,6 +2560,9 @@ static DisasJumpType op_vfa(DisasContext *s, DisasOps *o)
     case 0xe3:
         fn = se ? gen_helper_gvec_vfa64s : gen_helper_gvec_vfa64;
         break;
+    case 0xe5:
+        fn = se ? gen_helper_gvec_vfd64s : gen_helper_gvec_vfd64;
+        break;
     default:
         g_assert_not_reached();
     }

target/s390x/vec_fpu_helper.c

@@ -369,3 +369,20 @@ void HELPER(gvec_vclgd64s)(void *v1, const void *v2, CPUS390XState *env,
 
     vop64_2(v1, v2, env, true, XxC, erm, vclgd64, GETPC());
 }
+
+static uint64_t vfd64(uint64_t a, uint64_t b, float_status *s)
+{
+    return float64_div(a, b, s);
+}
+
+void HELPER(gvec_vfd64)(void *v1, const void *v2, const void *v3,
+                        CPUS390XState *env, uint32_t desc)
+{
+    vop64_3(v1, v2, v3, env, false, vfd64, GETPC());
+}
+
+void HELPER(gvec_vfd64s)(void *v1, const void *v2, const void *v3,
+                         CPUS390XState *env, uint32_t desc)
+{
+    vop64_3(v1, v2, v3, env, true, vfd64, GETPC());
+}