target/loongarch: Implement vabsd

This patch includes:
- VABSD.{B/H/W/D}[U].

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-12-gaosong@loongson.cn>

5 files changed, 133 insertions, 0 deletions

diff --git a/target/loongarch/disas.c b/target/loongarch/disas.c
index e7592e7..e98ea37 100644
--- a/target/loongarch/disas.c
+++ b/target/loongarch/disas.c
@@ -925,3 +925,12 @@ INSN_LSX(vavgr_bu,         vvv)
 INSN_LSX(vavgr_hu,         vvv)
 INSN_LSX(vavgr_wu,         vvv)
 INSN_LSX(vavgr_du,         vvv)
+
+INSN_LSX(vabsd_b,          vvv)
+INSN_LSX(vabsd_h,          vvv)
+INSN_LSX(vabsd_w,          vvv)
+INSN_LSX(vabsd_d,          vvv)
+INSN_LSX(vabsd_bu,         vvv)
+INSN_LSX(vabsd_hu,         vvv)
+INSN_LSX(vabsd_wu,         vvv)
+INSN_LSX(vabsd_du,         vvv)
diff --git a/target/loongarch/helper.h b/target/loongarch/helper.h
index af0f9f9..c3a5d25 100644
--- a/target/loongarch/helper.h
+++ b/target/loongarch/helper.h
@@ -211,3 +211,12 @@ DEF_HELPER_FLAGS_4(vavgr_bu, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(vavgr_hu, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(vavgr_wu, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(vavgr_du, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(vabsd_b, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(vabsd_h, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(vabsd_w, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(vabsd_d, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(vabsd_bu, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(vabsd_hu, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(vabsd_wu, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(vabsd_du, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
diff --git a/target/loongarch/insn_trans/trans_lsx.c.inc b/target/loongarch/insn_trans/trans_lsx.c.inc
index 5fa4792..0e9301b 100644
--- a/target/loongarch/insn_trans/trans_lsx.c.inc
+++ b/target/loongarch/insn_trans/trans_lsx.c.inc
@@ -1166,3 +1166,98 @@ TRANS(vavgr_bu, gvec_vvv, MO_8, do_vavgr_u)
 TRANS(vavgr_hu, gvec_vvv, MO_16, do_vavgr_u)
 TRANS(vavgr_wu, gvec_vvv, MO_32, do_vavgr_u)
 TRANS(vavgr_du, gvec_vvv, MO_64, do_vavgr_u)
+
+static void gen_vabsd_s(unsigned vece, TCGv_vec t, TCGv_vec a, TCGv_vec b)
+{
+    tcg_gen_smax_vec(vece, t, a, b);
+    tcg_gen_smin_vec(vece, a, a, b);
+    tcg_gen_sub_vec(vece, t, t, a);
+}
+
+static void do_vabsd_s(unsigned vece, uint32_t vd_ofs, uint32_t vj_ofs,
+                       uint32_t vk_ofs, uint32_t oprsz, uint32_t maxsz)
+{
+    static const TCGOpcode vecop_list[] = {
+        INDEX_op_smax_vec, INDEX_op_smin_vec, INDEX_op_sub_vec, 0
+        };
+    static const GVecGen3 op[4] = {
+        {
+            .fniv = gen_vabsd_s,
+            .fno = gen_helper_vabsd_b,
+            .opt_opc = vecop_list,
+            .vece = MO_8
+        },
+        {
+            .fniv = gen_vabsd_s,
+            .fno = gen_helper_vabsd_h,
+            .opt_opc = vecop_list,
+            .vece = MO_16
+        },
+        {
+            .fniv = gen_vabsd_s,
+            .fno = gen_helper_vabsd_w,
+            .opt_opc = vecop_list,
+            .vece = MO_32
+        },
+        {
+            .fniv = gen_vabsd_s,
+            .fno = gen_helper_vabsd_d,
+            .opt_opc = vecop_list,
+            .vece = MO_64
+        },
+    };
+
+    tcg_gen_gvec_3(vd_ofs, vj_ofs, vk_ofs, oprsz, maxsz, &op[vece]);
+}
+
+static void gen_vabsd_u(unsigned vece, TCGv_vec t, TCGv_vec a, TCGv_vec b)
+{
+    tcg_gen_umax_vec(vece, t, a, b);
+    tcg_gen_umin_vec(vece, a, a, b);
+    tcg_gen_sub_vec(vece, t, t, a);
+}
+
+static void do_vabsd_u(unsigned vece, uint32_t vd_ofs, uint32_t vj_ofs,
+                       uint32_t vk_ofs, uint32_t oprsz, uint32_t maxsz)
+{
+    static const TCGOpcode vecop_list[] = {
+        INDEX_op_umax_vec, INDEX_op_umin_vec, INDEX_op_sub_vec, 0
+        };
+    static const GVecGen3 op[4] = {
+        {
+            .fniv = gen_vabsd_u,
+            .fno = gen_helper_vabsd_bu,
+            .opt_opc = vecop_list,
+            .vece = MO_8
+        },
+        {
+            .fniv = gen_vabsd_u,
+            .fno = gen_helper_vabsd_hu,
+            .opt_opc = vecop_list,
+            .vece = MO_16
+        },
+        {
+            .fniv = gen_vabsd_u,
+            .fno = gen_helper_vabsd_wu,
+            .opt_opc = vecop_list,
+            .vece = MO_32
+        },
+        {
+            .fniv = gen_vabsd_u,
+            .fno = gen_helper_vabsd_du,
+            .opt_opc = vecop_list,
+            .vece = MO_64
+        },
+    };
+
+    tcg_gen_gvec_3(vd_ofs, vj_ofs, vk_ofs, oprsz, maxsz, &op[vece]);
+}
+
+TRANS(vabsd_b, gvec_vvv, MO_8, do_vabsd_s)
+TRANS(vabsd_h, gvec_vvv, MO_16, do_vabsd_s)
+TRANS(vabsd_w, gvec_vvv, MO_32, do_vabsd_s)
+TRANS(vabsd_d, gvec_vvv, MO_64, do_vabsd_s)
+TRANS(vabsd_bu, gvec_vvv, MO_8, do_vabsd_u)
+TRANS(vabsd_hu, gvec_vvv, MO_16, do_vabsd_u)
+TRANS(vabsd_wu, gvec_vvv, MO_32, do_vabsd_u)
+TRANS(vabsd_du, gvec_vvv, MO_64, do_vabsd_u)
diff --git a/target/loongarch/insns.decode b/target/loongarch/insns.decode
index 4a44380..825dded 100644
--- a/target/loongarch/insns.decode
+++ b/target/loongarch/insns.decode
@@ -619,3 +619,12 @@ vavgr_bu         0111 00000110 10100 ..... ..... .....    @vvv
 vavgr_hu         0111 00000110 10101 ..... ..... .....    @vvv
 vavgr_wu         0111 00000110 10110 ..... ..... .....    @vvv
 vavgr_du         0111 00000110 10111 ..... ..... .....    @vvv
+
+vabsd_b          0111 00000110 00000 ..... ..... .....    @vvv
+vabsd_h          0111 00000110 00001 ..... ..... .....    @vvv
+vabsd_w          0111 00000110 00010 ..... ..... .....    @vvv
+vabsd_d          0111 00000110 00011 ..... ..... .....    @vvv
+vabsd_bu         0111 00000110 00100 ..... ..... .....    @vvv
+vabsd_hu         0111 00000110 00101 ..... ..... .....    @vvv
+vabsd_wu         0111 00000110 00110 ..... ..... .....    @vvv
+vabsd_du         0111 00000110 00111 ..... ..... .....    @vvv
diff --git a/target/loongarch/lsx_helper.c b/target/loongarch/lsx_helper.c
index b683a1c..f0baffa 100644
--- a/target/loongarch/lsx_helper.c
+++ b/target/loongarch/lsx_helper.c
@@ -307,3 +307,14 @@ DO_3OP(vavgr_bu, 8, UB, DO_VAVGR)
 DO_3OP(vavgr_hu, 16, UH, DO_VAVGR)
 DO_3OP(vavgr_wu, 32, UW, DO_VAVGR)
 DO_3OP(vavgr_du, 64, UD, DO_VAVGR)
+
+#define DO_VABSD(a, b)  ((a > b) ? (a -b) : (b-a))
+
+DO_3OP(vabsd_b, 8, B, DO_VABSD)
+DO_3OP(vabsd_h, 16, H, DO_VABSD)
+DO_3OP(vabsd_w, 32, W, DO_VABSD)
+DO_3OP(vabsd_d, 64, D, DO_VABSD)
+DO_3OP(vabsd_bu, 8, UB, DO_VABSD)
+DO_3OP(vabsd_hu, 16, UH, DO_VABSD)
+DO_3OP(vabsd_wu, 32, UW, DO_VABSD)
+DO_3OP(vabsd_du, 64, UD, DO_VABSD)