[qemu-s390x] [PATCH v1 17/41] s390x/tcg: Implement VECTOR LOAD POSITIVE

[David Hildenbrand]

Similar to VECTOR LOAD COMPLEMENT but unfortunately we don't have a
gvec helper.

Signed-off-by: David Hildenbrand <address@hidden>
---
 target/s390x/helper.h           |  2 ++
 target/s390x/insn-data.def      |  2 ++
 target/s390x/translate_vx.inc.c | 40 +++++++++++++++++++++++++++++++++
 target/s390x/vec_int_helper.c   | 14 ++++++++++++
 4 files changed, 58 insertions(+)

diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index 18a3df6b07..065c4c6ea3 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -164,6 +164,8 @@ DEF_HELPER_FLAGS_5(gvec_vgfma8, TCG_CALL_NO_RWG, void, ptr, 
cptr, cptr, cptr, i3
 DEF_HELPER_FLAGS_5(gvec_vgfma16, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, 
i32)
 DEF_HELPER_FLAGS_5(gvec_vgfma32, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, 
i32)
 DEF_HELPER_FLAGS_5(gvec_vgfma64, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, 
i32)
+DEF_HELPER_FLAGS_3(gvec_vlp8, TCG_CALL_NO_RWG, void, ptr, cptr, i32)
+DEF_HELPER_FLAGS_3(gvec_vlp16, TCG_CALL_NO_RWG, void, ptr, cptr, 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 07868ff082..fc8886ff42 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1096,6 +1096,8 @@
     F(0xe7bc, VGFMA,   VRR_d, V,   0, 0, 0, 0, vgfma, 0, IF_VEC)
 /* VECTOR LOAD COMPLEMENT */
     F(0xe7de, VLC,     VRR_a, V,   0, 0, 0, 0, vlc, 0, IF_VEC)
+/* VECTOR LOAD POSITIVE */
+    F(0xe7df, VLP,     VRR_a, V,   0, 0, 0, 0, vlp, 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 28436cb01a..8cab3f876a 100644
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -1496,3 +1496,43 @@ static DisasJumpType op_vlc(DisasContext *s, DisasOps *o)
                   get_field(s->fields, v2));
     return DISAS_NEXT;
 }
+
+static void gen_lp_i32(TCGv_i32 d, TCGv_i32 a)
+{
+    TCGv_i32 zero = tcg_const_i32(0);
+    TCGv_i32 neg = tcg_temp_new_i32();
+
+    tcg_gen_neg_i32(neg, a);
+    tcg_gen_movcond_i32(TCG_COND_LT, d, a, zero, neg, a);
+    tcg_temp_free_i32(neg);
+    tcg_temp_free_i32(zero);
+}
+
+static void gen_lp_i64(TCGv_i64 d, TCGv_i64 a)
+{
+    TCGv_i64 zero = tcg_const_i64(0);
+    TCGv_i64 neg = tcg_temp_new_i64();
+
+    tcg_gen_neg_i64(neg, a);
+    tcg_gen_movcond_i64(TCG_COND_LT, d, a, zero, neg, a);
+    tcg_temp_free_i64(neg);
+    tcg_temp_free_i64(zero);
+}
+
+static DisasJumpType op_vlp(DisasContext *s, DisasOps *o)
+{
+    const uint8_t es = get_field(s->fields, m3);
+    static const GVecGen2 g[4] = {
+        { .fno = gen_helper_gvec_vlp8, },
+        { .fno = gen_helper_gvec_vlp16, },
+        { .fni4 = gen_lp_i32, },
+        { .fni8 = gen_lp_i64, },
+    };
+
+    if (es > ES_64) {
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return DISAS_NORETURN;
+    }
+    gen_gvec_2(get_field(s->fields, v1), get_field(s->fields, v2), &g[es]);
+    return DISAS_NEXT;
+}
diff --git a/target/s390x/vec_int_helper.c b/target/s390x/vec_int_helper.c
index 99dd0653f6..574f707abf 100644
--- a/target/s390x/vec_int_helper.c
+++ b/target/s390x/vec_int_helper.c
@@ -289,3 +289,17 @@ void HELPER(gvec_vgfma64)(void *v1, const void *v2, const 
void *v3,
     s390_vec_xor(&tmp1, &tmp1, &tmp2);
     s390_vec_xor(v1, &tmp1, v4);
 }
+
+#define DEF_VLP(BITS)                                                          
\
+void HELPER(gvec_vlp##BITS)(void *v1, const void *v2, uint32_t desc)           
\
+{                                                                              
\
+    int i;                                                                     
\
+                                                                               
\
+    for (i = 0; i < (128 / BITS); i++) {                                       
\
+        const int##BITS##_t a = s390_vec_read_element##BITS(v2, i);            
\
+                                                                               
\
+        s390_vec_write_element##BITS(v1, i, a < 0 ? -a : a);                   
\
+    }                                                                          
\
+}
+DEF_VLP(8)
+DEF_VLP(16)
-- 
2.20.1