diff --git a/target/sparc/insns.decode b/target/sparc/insns.decode
index 431152dde9..908b2ba408 100644
--- a/target/sparc/insns.decode
+++ b/target/sparc/insns.decode
@@ -264,6 +264,7 @@ FsMULd      10 ..... 110100 ..... 0 0110 1001 .....        @r_r_r
 FdMULq      10 ..... 110100 ..... 0 0110 1110 .....        @r_r_r
 FsTOx       10 ..... 110100 00000 0 1000 0001 .....        @r_r2
 FdTOx       10 ..... 110100 00000 0 1000 0010 .....        @r_r2
+FqTOx       10 ..... 110100 00000 0 1000 0011 .....        @r_r2
 FxTOs       10 ..... 110100 00000 0 1000 0100 .....        @r_r2
 FxTOd       10 ..... 110100 00000 0 1000 1000 .....        @r_r2
 FiTOs       10 ..... 110100 00000 0 1100 0100 .....        @r_r2
@@ -271,6 +272,7 @@ FdTOs       10 ..... 110100 00000 0 1100 0110 .....        @r_r2
 FqTOs       10 ..... 110100 00000 0 1100 0111 .....        @r_r2
 FiTOd       10 ..... 110100 00000 0 1100 1000 .....        @r_r2
 FsTOd       10 ..... 110100 00000 0 1100 1001 .....        @r_r2
+FqTOd       10 ..... 110100 00000 0 1100 1011 .....        @r_r2
 FsTOi       10 ..... 110100 00000 0 1101 0001 .....        @r_r2
 FdTOi       10 ..... 110100 00000 0 1101 0010 .....        @r_r2
 FqTOi       10 ..... 110100 00000 0 1101 0011 .....        @r_r2
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index fd3ffa1b96..def29dd4b8 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -55,6 +55,7 @@
 #define gen_helper_restored             ({ qemu_build_not_reached(); NULL; })
 #define gen_helper_fdtox                ({ qemu_build_not_reached(); NULL; })
 #define gen_helper_fstox                ({ qemu_build_not_reached(); NULL; })
+#define gen_helper_fqtox                ({ qemu_build_not_reached(); NULL; })
 #define gen_helper_fxtod                ({ qemu_build_not_reached(); NULL; })
 #define gen_helper_fxtos                ({ qemu_build_not_reached(); NULL; })
 #define gen_helper_fnegd(D, S)          qemu_build_not_reached()
@@ -1668,20 +1669,6 @@ static void gen_ne_fop_QQ(DisasContext *dc, int rd, int rs,
 }
 #endif
 
-static void gen_fop_DQ(DisasContext *dc, int rd, int rs,
-                       void (*gen)(TCGv_i64, TCGv_ptr))
-{
-    TCGv_i64 dst;
-
-    gen_op_load_fpr_QT1(QFPREG(rs));
-    dst = gen_dest_fpr_D(dc, rd);
-
-    gen(dst, tcg_env);
-    gen_helper_check_ieee_exceptions(cpu_fsr, tcg_env);
-
-    gen_store_fpr_D(dc, rd, dst);
-}
-
 static void gen_ne_fop_QF(DisasContext *dc, int rd, int rs,
                           void (*gen)(TCGv_ptr, TCGv_i32))
 {
@@ -4910,6 +4897,30 @@ static bool do_env_fq(DisasContext *dc, arg_r_r *a,
 TRANS(FqTOs, ALL, do_env_fq, a, gen_helper_fqtos)
 TRANS(FqTOi, ALL, do_env_fq, a, gen_helper_fqtoi)
 
+static bool do_env_dq(DisasContext *dc, arg_r_r *a,
+                      void (*func)(TCGv_i64, TCGv_env))
+{
+    TCGv_i64 dst;
+
+    if (gen_trap_ifnofpu(dc)) {
+        return true;
+    }
+    if (gen_trap_float128(dc)) {
+        return true;
+    }
+
+    gen_op_clear_ieee_excp_and_FTT();
+    gen_op_load_fpr_QT1(QFPREG(a->rs));
+    dst = gen_dest_fpr_D(dc, a->rd);
+    func(dst, tcg_env);
+    gen_helper_check_ieee_exceptions(cpu_fsr, tcg_env);
+    gen_store_fpr_D(dc, a->rd, dst);
+    return advance_pc(dc);
+}
+
+TRANS(FqTOd, ALL, do_env_dq, a, gen_helper_fqtod)
+TRANS(FqTOx, 64, do_env_dq, a, gen_helper_fqtox)
+
 static bool do_fff(DisasContext *dc, arg_r_r_r *a,
                    void (*func)(TCGv_i32, TCGv_i32, TCGv_i32))
 {
@@ -5193,11 +5204,9 @@ static void disas_sparc_legacy(DisasContext *dc, unsigned int insn)
                 case 0x81: /* V9 fstox */
                 case 0xc7: /* fqtos */
                 case 0xd3: /* fqtoi */
-                    g_assert_not_reached(); /* in decodetree */
                 case 0xcb: /* fqtod */
-                    CHECK_FPU_FEATURE(dc, FLOAT128);
-                    gen_fop_DQ(dc, rd, rs2, gen_helper_fqtod);
-                    break;
+                case 0x83: /* V9 fqtox */
+                    g_assert_not_reached(); /* in decodetree */
                 case 0xcc: /* fitoq */
                     CHECK_FPU_FEATURE(dc, FLOAT128);
                     gen_ne_fop_QF(dc, rd, rs2, gen_helper_fitoq);
@@ -5223,10 +5232,6 @@ static void disas_sparc_legacy(DisasContext *dc, unsigned int insn)
                     CHECK_FPU_FEATURE(dc, FLOAT128);
                     gen_ne_fop_QQ(dc, rd, rs2, gen_helper_fabsq);
                     break;
-                case 0x83: /* V9 fqtox */
-                    CHECK_FPU_FEATURE(dc, FLOAT128);
-                    gen_fop_DQ(dc, rd, rs2, gen_helper_fqtox);
-                    break;
                 case 0x8c: /* V9 fxtoq */
                     CHECK_FPU_FEATURE(dc, FLOAT128);
                     gen_ne_fop_QD(dc, rd, rs2, gen_helper_fxtoq);
