diff --git a/src/ast/rewriter/float_rewriter.cpp b/src/ast/rewriter/float_rewriter.cpp
index b43f07b65..bfcfbcbfc 100644
--- a/src/ast/rewriter/float_rewriter.cpp
+++ b/src/ast/rewriter/float_rewriter.cpp
@@ -58,6 +58,9 @@ br_status float_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * c
     case OP_FLOAT_IS_ZERO:   SASSERT(num_args == 1); st = mk_is_zero(args[0], result); break;
     case OP_FLOAT_IS_NZERO:  SASSERT(num_args == 1); st = mk_is_nzero(args[0], result); break;
     case OP_FLOAT_IS_PZERO:  SASSERT(num_args == 1); st = mk_is_pzero(args[0], result); break;
+    case OP_FLOAT_IS_INF:    SASSERT(num_args == 1); st = mk_is_inf(args[0], result); break;
+    case OP_FLOAT_IS_NORMAL: SASSERT(num_args == 1); st = mk_is_normal(args[0], result); break;
+    case OP_FLOAT_IS_SUBNORMAL: SASSERT(num_args == 1); st = mk_is_subnormal(args[0], result); break;
     case OP_FLOAT_IS_SIGN_MINUS: SASSERT(num_args == 1); st = mk_is_sign_minus(args[0], result); break;
     case OP_TO_IEEE_BV:      SASSERT(num_args == 1); st = mk_to_ieee_bv(args[0], result); break;
     }
@@ -428,6 +431,36 @@ br_status float_rewriter::mk_is_pzero(expr * arg1, expr_ref & result) {
     return BR_FAILED;
 }
 
+br_status float_rewriter::mk_is_inf(expr * arg1, expr_ref & result) {
+    scoped_mpf v(m_util.fm());
+    if (m_util.is_value(arg1, v)) {
+        result = (m_util.fm().is_inf(v)) ? m().mk_true() : m().mk_false();
+        return BR_DONE;
+    }
+
+    return BR_FAILED;
+}
+
+br_status float_rewriter::mk_is_normal(expr * arg1, expr_ref & result) {
+    scoped_mpf v(m_util.fm());
+    if (m_util.is_value(arg1, v)) {
+        result = (m_util.fm().is_normal(v)) ? m().mk_true() : m().mk_false();
+        return BR_DONE;
+    }
+
+    return BR_FAILED;
+}
+
+br_status float_rewriter::mk_is_subnormal(expr * arg1, expr_ref & result) {
+    scoped_mpf v(m_util.fm());
+    if (m_util.is_value(arg1, v)) {
+        result = (m_util.fm().is_denormal(v)) ? m().mk_true() : m().mk_false();
+        return BR_DONE;
+    }
+
+    return BR_FAILED;
+}
+
 br_status float_rewriter::mk_is_sign_minus(expr * arg1, expr_ref & result) {
     scoped_mpf v(m_util.fm());
     if (m_util.is_value(arg1, v)) {
diff --git a/src/ast/rewriter/float_rewriter.h b/src/ast/rewriter/float_rewriter.h
index 7c86a5bc3..6968d96cf 100644
--- a/src/ast/rewriter/float_rewriter.h
+++ b/src/ast/rewriter/float_rewriter.h
@@ -66,6 +66,9 @@ public:
     br_status mk_is_zero(expr * arg1, expr_ref & result);
     br_status mk_is_nzero(expr * arg1, expr_ref & result);
     br_status mk_is_pzero(expr * arg1, expr_ref & result);
+    br_status mk_is_inf(expr * arg1, expr_ref & result);
+    br_status mk_is_normal(expr * arg1, expr_ref & result);
+    br_status mk_is_subnormal(expr * arg1, expr_ref & result);
     br_status mk_is_sign_minus(expr * arg1, expr_ref & result);
 
     br_status mk_to_ieee_bv(expr * arg1, expr_ref & result);
diff --git a/src/tactic/fpa/fpa2bv_converter.cpp b/src/tactic/fpa/fpa2bv_converter.cpp
index 02aff67c6..d95709813 100644
--- a/src/tactic/fpa/fpa2bv_converter.cpp
+++ b/src/tactic/fpa/fpa2bv_converter.cpp
@@ -1621,6 +1621,21 @@ void fpa2bv_converter::mk_is_pzero(func_decl * f, unsigned num, expr * const * a
     m_simp.mk_and(a0_is_pos, a0_is_zero, result);
 }
 
+void fpa2bv_converter::mk_is_inf(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
+    SASSERT(num == 1);
+    mk_is_inf(args[0], result);
+}
+
+void fpa2bv_converter::mk_is_normal(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
+    SASSERT(num == 1);
+    mk_is_normal(args[0], result);
+}
+
+void fpa2bv_converter::mk_is_subnormal(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
+    SASSERT(num == 1);
+    mk_is_denormal(args[0], result);
+}
+
 void fpa2bv_converter::mk_is_sign_minus(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
     SASSERT(num == 1);
     mk_is_neg(args[0], result);
diff --git a/src/tactic/fpa/fpa2bv_converter.h b/src/tactic/fpa/fpa2bv_converter.h
index 2a68342f8..9f9c74c38 100644
--- a/src/tactic/fpa/fpa2bv_converter.h
+++ b/src/tactic/fpa/fpa2bv_converter.h
@@ -116,6 +116,9 @@ public:
     void mk_is_nzero(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
     void mk_is_pzero(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
     void mk_is_sign_minus(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
+    void mk_is_inf(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
+    void mk_is_normal(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
+    void mk_is_subnormal(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
 
     void mk_to_float(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
     void mk_to_ieee_bv(func_decl * f, unsigned num, expr * const * args, expr_ref & result);    
diff --git a/src/tactic/fpa/fpa2bv_rewriter.h b/src/tactic/fpa/fpa2bv_rewriter.h
index d8a141b62..59d068626 100644
--- a/src/tactic/fpa/fpa2bv_rewriter.h
+++ b/src/tactic/fpa/fpa2bv_rewriter.h
@@ -132,6 +132,9 @@ struct fpa2bv_rewriter_cfg : public default_rewriter_cfg {
             case OP_FLOAT_IS_ZERO: m_conv.mk_is_zero(f, num, args, result); return BR_DONE;
             case OP_FLOAT_IS_NZERO: m_conv.mk_is_nzero(f, num, args, result); return BR_DONE;
             case OP_FLOAT_IS_PZERO: m_conv.mk_is_pzero(f, num, args, result); return BR_DONE;
+            case OP_FLOAT_IS_INF: m_conv.mk_is_inf(f, num, args, result); return BR_DONE;
+            case OP_FLOAT_IS_NORMAL: m_conv.mk_is_normal(f, num, args, result); return BR_DONE;
+            case OP_FLOAT_IS_SUBNORMAL: m_conv.mk_is_subnormal(f, num, args, result); return BR_DONE;
             case OP_FLOAT_IS_SIGN_MINUS: m_conv.mk_is_sign_minus(f, num, args, result); return BR_DONE;
             case OP_TO_FLOAT: m_conv.mk_to_float(f, num, args, result); return BR_DONE;
             case OP_TO_IEEE_BV: m_conv.mk_to_ieee_bv(f, num, args, result); return BR_DONE;