diff --git a/target-s390x/fpu_helper.c b/target-s390x/fpu_helper.c
index 74b94f290f..6a76541833 100644
--- a/target-s390x/fpu_helper.c
+++ b/target-s390x/fpu_helper.c
@@ -457,6 +457,72 @@ uint64_t HELPER(cfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
     return ret;
 }
 
+/* convert 32-bit float to 64-bit uint */
+uint64_t HELPER(clgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+    int hold = swap_round_mode(env, m3);
+    uint64_t ret;
+    v2 = float32_to_float64(v2, &env->fpu_status);
+    ret = float64_to_uint64(v2, &env->fpu_status);
+    set_float_rounding_mode(hold, &env->fpu_status);
+    handle_exceptions(env, GETPC());
+    return ret;
+}
+
+/* convert 64-bit float to 64-bit uint */
+uint64_t HELPER(clgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+    int hold = swap_round_mode(env, m3);
+    uint64_t ret = float64_to_uint64(v2, &env->fpu_status);
+    set_float_rounding_mode(hold, &env->fpu_status);
+    handle_exceptions(env, GETPC());
+    return ret;
+}
+
+/* convert 128-bit float to 64-bit uint */
+uint64_t HELPER(clgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
+{
+    int hold = swap_round_mode(env, m3);
+    float128 v2 = make_float128(h, l);
+    /* ??? Not 100% correct.  */
+    uint64_t ret = float128_to_int64(v2, &env->fpu_status);
+    set_float_rounding_mode(hold, &env->fpu_status);
+    handle_exceptions(env, GETPC());
+    return ret;
+}
+
+/* convert 32-bit float to 32-bit uint */
+uint64_t HELPER(clfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+    int hold = swap_round_mode(env, m3);
+    uint32_t ret = float32_to_uint32(v2, &env->fpu_status);
+    set_float_rounding_mode(hold, &env->fpu_status);
+    handle_exceptions(env, GETPC());
+    return ret;
+}
+
+/* convert 64-bit float to 32-bit uint */
+uint64_t HELPER(clfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+    int hold = swap_round_mode(env, m3);
+    uint32_t ret = float64_to_uint32(v2, &env->fpu_status);
+    set_float_rounding_mode(hold, &env->fpu_status);
+    handle_exceptions(env, GETPC());
+    return ret;
+}
+
+/* convert 128-bit float to 32-bit uint */
+uint64_t HELPER(clfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
+{
+    int hold = swap_round_mode(env, m3);
+    float128 v2 = make_float128(h, l);
+    /* Not 100% correct.  */
+    uint32_t ret = float128_to_int64(v2, &env->fpu_status);
+    set_float_rounding_mode(hold, &env->fpu_status);
+    handle_exceptions(env, GETPC());
+    return ret;
+}
+
 /* 32-bit FP multiply and add */
 uint64_t HELPER(maeb)(CPUS390XState *env, uint64_t f1,
                       uint64_t f2, uint64_t f3)
diff --git a/target-s390x/helper.h b/target-s390x/helper.h
index 5d8a82175c..0204e8505f 100644
--- a/target-s390x/helper.h
+++ b/target-s390x/helper.h
@@ -61,6 +61,12 @@ DEF_HELPER_4(cgxb, i64, env, i64, i64, i32)
 DEF_HELPER_3(cfeb, i64, env, i64, i32)
 DEF_HELPER_3(cfdb, i64, env, i64, i32)
 DEF_HELPER_4(cfxb, i64, env, i64, i64, i32)
+DEF_HELPER_3(clgeb, i64, env, i64, i32)
+DEF_HELPER_3(clgdb, i64, env, i64, i32)
+DEF_HELPER_4(clgxb, i64, env, i64, i64, i32)
+DEF_HELPER_3(clfeb, i64, env, i64, i32)
+DEF_HELPER_3(clfdb, i64, env, i64, i32)
+DEF_HELPER_4(clfxb, i64, env, i64, i64, i32)
 DEF_HELPER_4(maeb, i64, env, i64, i64, i64)
 DEF_HELPER_4(madb, i64, env, i64, i64, i64)
 DEF_HELPER_4(mseb, i64, env, i64, i64, i64)
diff --git a/target-s390x/insn-data.def b/target-s390x/insn-data.def
index 00b95b681d..a67fdcc6ad 100644
--- a/target-s390x/insn-data.def
+++ b/target-s390x/insn-data.def
@@ -226,6 +226,13 @@
     C(0xb3a4, CEGBR,   RRF_e, Z,   0, r2_o, new, e1, cegb, 0)
     C(0xb3a5, CDGBR,   RRF_e, Z,   0, r2_o, f1, 0, cdgb, 0)
     C(0xb3a6, CXGBR,   RRF_e, Z,   0, r2_o, x1, 0, cxgb, 0)
+/* CONVERT TO LOGICAL */
+    C(0xb39c, CLFEBR,  RRF_e, FPE, 0, e2, new, r1_32, clfeb, 0)
+    C(0xb39d, CLFDBR,  RRF_e, FPE, 0, f2_o, new, r1_32, clfdb, 0)
+    C(0xb39e, CLFXBR,  RRF_e, FPE, 0, x2_o, new, r1_32, clfxb, 0)
+    C(0xb3ac, CLGEBR,  RRF_e, FPE, 0, e2, r1, 0, clgeb, 0)
+    C(0xb3ad, CLGDBR,  RRF_e, FPE, 0, f2_o, r1, 0, clgdb, 0)
+    C(0xb3ae, CLGXBR,  RRF_e, FPE, 0, x2_o, r1, 0, clgxb, 0)
 
 /* DIVIDE */
     C(0x1d00, DR,      RR_a,  Z,   r1_D32, r2_32s, new_P, r1_P32, divs32, 0)
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index 321fc46a13..1b7a8dc946 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -1530,6 +1530,60 @@ static ExitStatus op_cgxb(DisasContext *s, DisasOps *o)
     return NO_EXIT;
 }
 
+static ExitStatus op_clfeb(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 m3 = tcg_const_i32(get_field(s->fields, m3));
+    gen_helper_clfeb(o->out, cpu_env, o->in2, m3);
+    tcg_temp_free_i32(m3);
+    gen_set_cc_nz_f32(s, o->in2);
+    return NO_EXIT;
+}
+
+static ExitStatus op_clfdb(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 m3 = tcg_const_i32(get_field(s->fields, m3));
+    gen_helper_clfdb(o->out, cpu_env, o->in2, m3);
+    tcg_temp_free_i32(m3);
+    gen_set_cc_nz_f64(s, o->in2);
+    return NO_EXIT;
+}
+
+static ExitStatus op_clfxb(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 m3 = tcg_const_i32(get_field(s->fields, m3));
+    gen_helper_clfxb(o->out, cpu_env, o->in1, o->in2, m3);
+    tcg_temp_free_i32(m3);
+    gen_set_cc_nz_f128(s, o->in1, o->in2);
+    return NO_EXIT;
+}
+
+static ExitStatus op_clgeb(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 m3 = tcg_const_i32(get_field(s->fields, m3));
+    gen_helper_clgeb(o->out, cpu_env, o->in2, m3);
+    tcg_temp_free_i32(m3);
+    gen_set_cc_nz_f32(s, o->in2);
+    return NO_EXIT;
+}
+
+static ExitStatus op_clgdb(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 m3 = tcg_const_i32(get_field(s->fields, m3));
+    gen_helper_clgdb(o->out, cpu_env, o->in2, m3);
+    tcg_temp_free_i32(m3);
+    gen_set_cc_nz_f64(s, o->in2);
+    return NO_EXIT;
+}
+
+static ExitStatus op_clgxb(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 m3 = tcg_const_i32(get_field(s->fields, m3));
+    gen_helper_clgxb(o->out, cpu_env, o->in1, o->in2, m3);
+    tcg_temp_free_i32(m3);
+    gen_set_cc_nz_f128(s, o->in1, o->in2);
+    return NO_EXIT;
+}
+
 static ExitStatus op_cegb(DisasContext *s, DisasOps *o)
 {
     TCGv_i32 m3 = tcg_const_i32(get_field(s->fields, m3));