[Qemu-devel] [PULL 34/54] s390x/tcg: Implement VECTOR SHIFT LEFT (BY BYTE)

[Cornelia Huck <cohuck@redhat.com>]

From: David Hildenbrand <david@redhat.com>

We can reuse the existing 128-bit shift utility function.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 target/s390x/helper.h           |  1 +
 target/s390x/insn-data.def      |  4 ++++
 target/s390x/translate_vx.inc.c | 20 ++++++++++++++++++++
 target/s390x/vec_int_helper.c   |  6 ++++++
 4 files changed, 31 insertions(+)

diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index d570f763d94a..b4ddc8a7225e 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -204,6 +204,7 @@ DEF_HELPER_FLAGS_4(gvec_verll8, TCG_CALL_NO_RWG, void, ptr, cptr, i64, i32)
 DEF_HELPER_FLAGS_4(gvec_verll16, TCG_CALL_NO_RWG, void, ptr, cptr, i64, i32)
 DEF_HELPER_FLAGS_4(gvec_verim8, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32)
 DEF_HELPER_FLAGS_4(gvec_verim16, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32)
+DEF_HELPER_FLAGS_4(gvec_vsl, TCG_CALL_NO_RWG, void, ptr, cptr, i64, 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 f4b67bda7eb2..2621e433cd03 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1160,6 +1160,10 @@
 /* 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)
+/* VECTOR SHIFT LEFT */
+    F(0xe774, VSL,     VRR_c, V,   0, 0, 0, 0, vsl, 0, IF_VEC)
+/* VECTOR SHIFT LEFT BY BYTE */
+    F(0xe775, VSLB,    VRR_c, V,   0, 0, 0, 0, vsl, 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 15353096c0b8..734c022b3610 100644
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -188,6 +188,9 @@ static void get_vec_element_ptr_i64(TCGv_ptr ptr, uint8_t reg, TCGv_i64 enr,
 #define gen_gvec_2s(v1, v2, c, gen) \
     tcg_gen_gvec_2s(vec_full_reg_offset(v1), vec_full_reg_offset(v2), \
                     16, 16, c, gen)
+#define gen_gvec_2i_ool(v1, v2, c, data, fn) \
+    tcg_gen_gvec_2i_ool(vec_full_reg_offset(v1), vec_full_reg_offset(v2), \
+                        c, 16, 16, data, fn)
 #define gen_gvec_3(v1, v2, v3, gen) \
     tcg_gen_gvec_3(vec_full_reg_offset(v1), vec_full_reg_offset(v2), \
                    vec_full_reg_offset(v3), 16, 16, gen)
@@ -2040,3 +2043,20 @@ static DisasJumpType op_ves(DisasContext *s, DisasOps *o)
     }
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vsl(DisasContext *s, DisasOps *o)
+{
+    TCGv_i64 shift = tcg_temp_new_i64();
+
+    read_vec_element_i64(shift, get_field(s->fields, v3), 7, ES_8);
+    if (s->fields->op2 == 0x74) {
+        tcg_gen_andi_i64(shift, shift, 0x7);
+    } else {
+        tcg_gen_andi_i64(shift, shift, 0x78);
+    }
+
+    gen_gvec_2i_ool(get_field(s->fields, v1), get_field(s->fields, v2),
+                    shift, 0, gen_helper_gvec_vsl);
+    tcg_temp_free_i64(shift);
+    return DISAS_NEXT;
+}
diff --git a/target/s390x/vec_int_helper.c b/target/s390x/vec_int_helper.c
index b881fb722de2..3df069f03319 100644
--- a/target/s390x/vec_int_helper.c
+++ b/target/s390x/vec_int_helper.c
@@ -529,3 +529,9 @@ void HELPER(gvec_verim##BITS)(void *v1, const void *v2, const void *v3,        \
 }
 DEF_VERIM(8)
 DEF_VERIM(16)
+
+void HELPER(gvec_vsl)(void *v1, const void *v2, uint64_t count,
+                      uint32_t desc)
+{
+    s390_vec_shl(v1, v2, count);
+}
-- 
2.20.1