diff --git a/target/sparc/fop_helper.c b/target/sparc/fop_helper.c
index 657a14575d..9f39b933e8 100644
--- a/target/sparc/fop_helper.c
+++ b/target/sparc/fop_helper.c
@@ -190,9 +190,9 @@ void helper_fstoq(CPUSPARCState *env, float32 src)
     QT0 = float32_to_float128(src, &env->fp_status);
 }
 
-float64 helper_fqtod(CPUSPARCState *env)
+float64 helper_fqtod(CPUSPARCState *env, Int128 src)
 {
-    return float128_to_float64(QT1, &env->fp_status);
+    return float128_to_float64(f128_in(src), &env->fp_status);
 }
 
 void helper_fdtoq(CPUSPARCState *env, float64 src)
@@ -227,9 +227,9 @@ int64_t helper_fdtox(CPUSPARCState *env, float64 src)
     return float64_to_int64_round_to_zero(src, &env->fp_status);
 }
 
-int64_t helper_fqtox(CPUSPARCState *env)
+int64_t helper_fqtox(CPUSPARCState *env, Int128 src)
 {
-    return float128_to_int64_round_to_zero(QT1, &env->fp_status);
+    return float128_to_int64_round_to_zero(f128_in(src), &env->fp_status);
 }
 #endif
 
diff --git a/target/sparc/helper.h b/target/sparc/helper.h
index e770107eb0..4cb3451878 100644
--- a/target/sparc/helper.h
+++ b/target/sparc/helper.h
@@ -100,7 +100,7 @@ DEF_HELPER_FLAGS_2(fdtos, TCG_CALL_NO_RWG, f32, env, f64)
 DEF_HELPER_FLAGS_2(fstod, TCG_CALL_NO_RWG, f64, env, f32)
 DEF_HELPER_FLAGS_2(fqtos, TCG_CALL_NO_RWG, f32, env, i128)
 DEF_HELPER_FLAGS_2(fstoq, TCG_CALL_NO_RWG, void, env, f32)
-DEF_HELPER_FLAGS_1(fqtod, TCG_CALL_NO_RWG, f64, env)
+DEF_HELPER_FLAGS_2(fqtod, TCG_CALL_NO_RWG, f64, env, i128)
 DEF_HELPER_FLAGS_2(fdtoq, TCG_CALL_NO_RWG, void, env, f64)
 DEF_HELPER_FLAGS_2(fstoi, TCG_CALL_NO_RWG, s32, env, f32)
 DEF_HELPER_FLAGS_2(fdtoi, TCG_CALL_NO_RWG, s32, env, f64)
@@ -108,7 +108,7 @@ DEF_HELPER_FLAGS_2(fqtoi, TCG_CALL_NO_RWG, s32, env, i128)
 #ifdef TARGET_SPARC64
 DEF_HELPER_FLAGS_2(fstox, TCG_CALL_NO_RWG, s64, env, f32)
 DEF_HELPER_FLAGS_2(fdtox, TCG_CALL_NO_RWG, s64, env, f64)
-DEF_HELPER_FLAGS_1(fqtox, TCG_CALL_NO_RWG, s64, env)
+DEF_HELPER_FLAGS_2(fqtox, TCG_CALL_NO_RWG, s64, env, i128)
 
 DEF_HELPER_FLAGS_2(fpmerge, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 DEF_HELPER_FLAGS_2(fmul8x16, TCG_CALL_NO_RWG_SE, i64, i64, i64)
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index f70efb29a1..6f75f4d5d6 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -4717,8 +4717,9 @@ 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))
+                      void (*func)(TCGv_i64, TCGv_env, TCGv_i128))
 {
+    TCGv_i128 src;
     TCGv_i64 dst;
 
     if (gen_trap_ifnofpu(dc)) {
@@ -4729,9 +4730,9 @@ static bool do_env_dq(DisasContext *dc, arg_r_r *a,
     }
 
     gen_op_clear_ieee_excp_and_FTT();
-    gen_op_load_fpr_QT1(QFPREG(a->rs));
+    src = gen_load_fpr_Q(dc, a->rs);
     dst = gen_dest_fpr_D(dc, a->rd);
-    func(dst, tcg_env);
+    func(dst, tcg_env, src);
     gen_helper_check_ieee_exceptions(cpu_fsr, tcg_env);
     gen_store_fpr_D(dc, a->rd, dst);
     return advance_pc(dc);