target/loongarch: Implement vneg

This patch includes;
- VNEG.{B/H/W/D}.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-7-gaosong@loongson.cn>

target/loongarch/disas.c

@@ -802,6 +802,11 @@ static void output_vv_i(DisasContext *ctx, arg_vv_i *a, const char *mnemonic)
     output(ctx, mnemonic, "v%d, v%d, 0x%x", a->vd, a->vj, a->imm);
 }
 
+static void output_vv(DisasContext *ctx, arg_vv *a, const char *mnemonic)
+{
+    output(ctx, mnemonic, "v%d, v%d", a->vd, a->vj);
+}
+
 INSN_LSX(vadd_b,           vvv)
 INSN_LSX(vadd_h,           vvv)
 INSN_LSX(vadd_w,           vvv)
@@ -821,3 +826,8 @@ INSN_LSX(vsubi_bu,         vv_i)
 INSN_LSX(vsubi_hu,         vv_i)
 INSN_LSX(vsubi_wu,         vv_i)
 INSN_LSX(vsubi_du,         vv_i)
+
+INSN_LSX(vneg_b,           vv)
+INSN_LSX(vneg_h,           vv)
+INSN_LSX(vneg_w,           vv)
+INSN_LSX(vneg_d,           vv)

target/loongarch/insn_trans/trans_lsx.c.inc

@@ -44,6 +44,21 @@ static bool gvec_vvv(DisasContext *ctx, arg_vvv *a, MemOp mop,
     return true;
 }
 
+static bool gvec_vv(DisasContext *ctx, arg_vv *a, MemOp mop,
+                    void (*func)(unsigned, uint32_t, uint32_t,
+                                 uint32_t, uint32_t))
+{
+    uint32_t vd_ofs, vj_ofs;
+
+    CHECK_SXE;
+
+    vd_ofs = vec_full_offset(a->vd);
+    vj_ofs = vec_full_offset(a->vj);
+
+    func(mop, vd_ofs, vj_ofs, 16, ctx->vl/8);
+    return true;
+}
+
 static bool gvec_vv_i(DisasContext *ctx, arg_vv_i *a, MemOp mop,
                       void (*func)(unsigned, uint32_t, uint32_t,
                                    int64_t, uint32_t, uint32_t))
@@ -120,3 +135,8 @@ TRANS(vsubi_bu, gvec_subi, MO_8)
 TRANS(vsubi_hu, gvec_subi, MO_16)
 TRANS(vsubi_wu, gvec_subi, MO_32)
 TRANS(vsubi_du, gvec_subi, MO_64)
+
+TRANS(vneg_b, gvec_vv, MO_8, tcg_gen_gvec_neg)
+TRANS(vneg_h, gvec_vv, MO_16, tcg_gen_gvec_neg)
+TRANS(vneg_w, gvec_vv, MO_32, tcg_gen_gvec_neg)
+TRANS(vneg_d, gvec_vv, MO_64, tcg_gen_gvec_neg)

target/loongarch/insns.decode

@@ -490,12 +490,14 @@ dbcl             0000 00000010 10101 ...............      @i15
 # LSX Argument sets
 #
 
+&vv           vd vj
 &vvv          vd vj vk
 &vv_i         vd vj imm
 
 #
 # LSX Formats
 #
+@vv               .... ........ ..... ..... vj:5 vd:5    &vv
 @vvv               .... ........ ..... vk:5 vj:5 vd:5    &vvv
 @vv_ui5           .... ........ ..... imm:5 vj:5 vd:5    &vv_i
 
@@ -518,3 +520,8 @@ vsubi_bu         0111 00101000 11000 ..... ..... .....    @vv_ui5
 vsubi_hu         0111 00101000 11001 ..... ..... .....    @vv_ui5
 vsubi_wu         0111 00101000 11010 ..... ..... .....    @vv_ui5
 vsubi_du         0111 00101000 11011 ..... ..... .....    @vv_ui5
+
+vneg_b           0111 00101001 11000 01100 ..... .....    @vv
+vneg_h           0111 00101001 11000 01101 ..... .....    @vv
+vneg_w           0111 00101001 11000 01110 ..... .....    @vv
+vneg_d           0111 00101001 11000 01111 ..... .....    @vv