diff --git a/target/sparc/fop_helper.c b/target/sparc/fop_helper.c
index d6fb769769..d639e50965 100644
--- a/target/sparc/fop_helper.c
+++ b/target/sparc/fop_helper.c
@@ -26,6 +26,28 @@
 #define QT0 (env->qt0)
 #define QT1 (env->qt1)
 
+static inline float128 f128_in(Int128 i)
+{
+    union {
+        Int128 i;
+        float128 f;
+    } u;
+
+    u.i = i;
+    return u.f;
+}
+
+static inline Int128 f128_ret(float128 f)
+{
+    union {
+        Int128 i;
+        float128 f;
+    } u;
+
+    u.f = f;
+    return u.i;
+}
+
 static target_ulong do_check_ieee_exceptions(CPUSPARCState *env, uintptr_t ra)
 {
     target_ulong status = get_float_exception_flags(&env->fp_status);
@@ -222,9 +244,9 @@ float64 helper_fsqrtd(CPUSPARCState *env, float64 src)
     return float64_sqrt(src, &env->fp_status);
 }
 
-void helper_fsqrtq(CPUSPARCState *env)
+Int128 helper_fsqrtq(CPUSPARCState *env, Int128 src)
 {
-    QT0 = float128_sqrt(QT1, &env->fp_status);
+    return f128_ret(float128_sqrt(f128_in(src), &env->fp_status));
 }
 
 #define GEN_FCMP(name, size, reg1, reg2, FS, E)                         \
diff --git a/target/sparc/helper.h b/target/sparc/helper.h
index 74a1575d21..eea2fa570c 100644
--- a/target/sparc/helper.h
+++ b/target/sparc/helper.h
@@ -43,7 +43,7 @@ DEF_HELPER_FLAGS_3(fcmps, TCG_CALL_NO_WG, tl, env, f32, f32)
 DEF_HELPER_FLAGS_3(fcmpd, TCG_CALL_NO_WG, tl, env, f64, f64)
 DEF_HELPER_FLAGS_3(fcmpes, TCG_CALL_NO_WG, tl, env, f32, f32)
 DEF_HELPER_FLAGS_3(fcmped, TCG_CALL_NO_WG, tl, env, f64, f64)
-DEF_HELPER_FLAGS_1(fsqrtq, TCG_CALL_NO_RWG, void, env)
+DEF_HELPER_FLAGS_2(fsqrtq, TCG_CALL_NO_RWG, i128, env, i128)
 DEF_HELPER_FLAGS_1(fcmpq, TCG_CALL_NO_WG, tl, env)
 DEF_HELPER_FLAGS_1(fcmpeq, TCG_CALL_NO_WG, tl, env)
 #ifdef TARGET_SPARC64
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index 41952281dc..ca98565c16 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -4669,8 +4669,10 @@ TRANS(FNEGq, 64, do_qq, a, gen_op_fnegq)
 TRANS(FABSq, 64, do_qq, a, gen_op_fabsq)
 
 static bool do_env_qq(DisasContext *dc, arg_r_r *a,
-                       void (*func)(TCGv_env))
+                      void (*func)(TCGv_i128, TCGv_env, TCGv_i128))
 {
+    TCGv_i128 t;
+
     if (gen_trap_ifnofpu(dc)) {
         return true;
     }
@@ -4679,11 +4681,11 @@ static bool do_env_qq(DisasContext *dc, arg_r_r *a,
     }
 
     gen_op_clear_ieee_excp_and_FTT();
-    gen_op_load_fpr_QT1(QFPREG(a->rs));
-    func(tcg_env);
+
+    t = gen_load_fpr_Q(dc, a->rs);
+    func(t, tcg_env, t);
     gen_helper_check_ieee_exceptions(cpu_fsr, tcg_env);
-    gen_op_store_QT0_fpr(QFPREG(a->rd));
-    gen_update_fprs_dirty(dc, QFPREG(a->rd));
+    gen_store_fpr_Q(dc, a->rd, t);
     return advance_pc(dc);
 }