s390x/tcg: Implement VECTOR ELEMENT SHIFT

We can use all the fancy new vector helpers implemented by Richard.

One important thing to take care of is always to properly mask of
unused bits from the shift count.

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

diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index 59c323a7962d5cbf0462dc00830945f160bf5707..f4b67bda7eb26d2f408bc79e20ecbbc774aa9e8a 100644 (file)
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1151,6 +1151,15 @@
     F(0xe733, VERLL,   VRS_a, V,   la2, 0, 0, 0, verll, 0, IF_VEC)
 /* VECTOR ELEMENT ROTATE AND INSERT UNDER MASK */
     F(0xe772, VERIM,   VRI_d, V,   0, 0, 0, 0, verim, 0, IF_VEC)
+/* VECTOR ELEMENT SHIFT LEFT */
+    F(0xe770, VESLV,   VRR_c, V,   0, 0, 0, 0, vesv, 0, IF_VEC)
+    F(0xe730, VESL,    VRS_a, V,   la2, 0, 0, 0, ves, 0, IF_VEC)
+/* VECTOR ELEMENT SHIFT RIGHT ARITHMETIC */
+    F(0xe77a, VESRAV,  VRR_c, V,   0, 0, 0, 0, vesv, 0, IF_VEC)
+    F(0xe73a, VESRA,   VRS_a, V,   la2, 0, 0, 0, ves, 0, IF_VEC)
+/* VECTOR ELEMENT SHIFT RIGHT LOGICAL */
+    F(0xe778, VESRLV,  VRR_c, V,   0, 0, 0, 0, vesv, 0, IF_VEC)
+    F(0xe738, VESRL,   VRS_a, V,   la2, 0, 0, 0, ves, 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 a2de139cfcf34c54bae6a9bf1bd44a335543420a..15353096c0b83dcef490a41047ee776508544576 100644 (file)
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -218,6 +218,12 @@ static void get_vec_element_ptr_i64(TCGv_ptr ptr, uint8_t reg, TCGv_i64 enr,
 #define gen_gvec_fn_2(fn, es, v1, v2) \
     tcg_gen_gvec_##fn(es, vec_full_reg_offset(v1), vec_full_reg_offset(v2), \
                       16, 16)
+#define gen_gvec_fn_2i(fn, es, v1, v2, c) \
+    tcg_gen_gvec_##fn(es, vec_full_reg_offset(v1), vec_full_reg_offset(v2), \
+                      c, 16, 16)
+#define gen_gvec_fn_2s(fn, es, v1, v2, s) \
+    tcg_gen_gvec_##fn(es, vec_full_reg_offset(v1), vec_full_reg_offset(v2), \
+                      s, 16, 16)
 #define gen_gvec_fn_3(fn, es, v1, v2, v3) \
     tcg_gen_gvec_##fn(es, vec_full_reg_offset(v1), vec_full_reg_offset(v2), \
                       vec_full_reg_offset(v3), 16, 16)
@@ -1956,3 +1962,81 @@ static DisasJumpType op_verim(DisasContext *s, DisasOps *o)
                 get_field(s->fields, v3), i4, &g[es]);
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vesv(DisasContext *s, DisasOps *o)
+{
+    const uint8_t es = get_field(s->fields, m4);
+    const uint8_t v1 = get_field(s->fields, v1);
+    const uint8_t v2 = get_field(s->fields, v2);
+    const uint8_t v3 = get_field(s->fields, v3);
+
+    if (es > ES_64) {
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return DISAS_NORETURN;
+    }
+
+    switch (s->fields->op2) {
+    case 0x70:
+        gen_gvec_fn_3(shlv, es, v1, v2, v3);
+        break;
+    case 0x7a:
+        gen_gvec_fn_3(sarv, es, v1, v2, v3);
+        break;
+    case 0x78:
+        gen_gvec_fn_3(shrv, es, v1, v2, v3);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+    return DISAS_NEXT;
+}
+
+static DisasJumpType op_ves(DisasContext *s, DisasOps *o)
+{
+    const uint8_t es = get_field(s->fields, m4);
+    const uint8_t d2 = get_field(s->fields, d2) &
+                       (NUM_VEC_ELEMENT_BITS(es) - 1);
+    const uint8_t v1 = get_field(s->fields, v1);
+    const uint8_t v3 = get_field(s->fields, v3);
+    TCGv_i32 shift;
+
+    if (es > ES_64) {
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return DISAS_NORETURN;
+    }
+
+    if (likely(!get_field(s->fields, b2))) {
+        switch (s->fields->op2) {
+        case 0x30:
+            gen_gvec_fn_2i(shli, es, v1, v3, d2);
+            break;
+        case 0x3a:
+            gen_gvec_fn_2i(sari, es, v1, v3, d2);
+            break;
+        case 0x38:
+            gen_gvec_fn_2i(shri, es, v1, v3, d2);
+            break;
+        default:
+            g_assert_not_reached();
+        }
+    } else {
+        shift = tcg_temp_new_i32();
+        tcg_gen_extrl_i64_i32(shift, o->addr1);
+        tcg_gen_andi_i32(shift, shift, NUM_VEC_ELEMENT_BITS(es) - 1);
+        switch (s->fields->op2) {
+        case 0x30:
+            gen_gvec_fn_2s(shls, es, v1, v3, shift);
+            break;
+        case 0x3a:
+            gen_gvec_fn_2s(sars, es, v1, v3, shift);
+            break;
+        case 0x38:
+            gen_gvec_fn_2s(shrs, es, v1, v3, shift);
+            break;
+        default:
+            g_assert_not_reached();
+        }
+        tcg_temp_free_i32(shift);
+    }
+    return DISAS_NEXT;
+}