diff --git a/internal/c/libqb.cpp b/internal/c/libqb.cpp
index 4811d4e3a..ae1445f49 100644
--- a/internal/c/libqb.cpp
+++ b/internal/c/libqb.cpp
@@ -17552,44 +17552,6 @@ int32 func_pos(int32 ignore) {
     return write_page->cursor_x;
 }
 
-double func_log(double value) {
-    if (value <= 0) {
-        error(5);
-        return 0;
-    }
-    return std::log(value);
-}
-
-// FIX
-double func_fix_double(double value) {
-    if (value < 0)
-        return std::ceil(value);
-    else
-        return std::floor(value);
-}
-long double func_fix_float(long double value) {
-    if (value < 0)
-        return std::ceil(value);
-    else
-        return std::floor(value);
-}
-
-// EXP
-double func_exp_single(double value) {
-    if (value <= 88.02969) {
-        return std::exp(value);
-    }
-    error(6);
-    return 0;
-}
-long double func_exp_float(long double value) {
-    if (value <= 709.782712893) {
-        return std::exp(value);
-    }
-    error(6);
-    return 0;
-}
-
 int32 sleep_break = 0;
 
 void sub_sleep(int32 seconds, int32 passed) {
diff --git a/internal/c/libqb/build.mk b/internal/c/libqb/build.mk
index ca27bfeae..a09f384cf 100644
--- a/internal/c/libqb/build.mk
+++ b/internal/c/libqb/build.mk
@@ -9,6 +9,7 @@ libqb-objs-y += $(PATH_LIBQB)/src/error_handle.o
 libqb-objs-y += $(PATH_LIBQB)/src/gfs.o
 libqb-objs-y += $(PATH_LIBQB)/src/qblist.o
 libqb-objs-y += $(PATH_LIBQB)/src/mem.o
+libqb-objs-y += $(PATH_LIBQB)/src/math.o
 libqb-objs-y += $(PATH_LIBQB)/src/rounding.o
 libqb-objs-y += $(PATH_LIBQB)/src/qbs.o
 libqb-objs-y += $(PATH_LIBQB)/src/qbs_str.o
diff --git a/internal/c/libqb/include/qbmath.h b/internal/c/libqb/include/qbmath.h
new file mode 100644
index 000000000..3b7bdc38a
--- /dev/null
+++ b/internal/c/libqb/include/qbmath.h
@@ -0,0 +1,123 @@
+#pragma once
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+double func_log(double value);
+double func_fix_double(double value);
+long double func_fix_float(long double value);
+double func_exp_single(double value);
+long double func_exp_float(long double value);
+
+// force abs to return floating point numbers correctly
+static inline double func_abs(double d) { return std::fabs(d); }
+static inline long double func_abs(long double d) { return std::fabs(d); }
+static inline float func_abs(float d) { return std::fabs(d); }
+
+static inline uint8_t func_abs(uint8_t d) { return d; }
+static inline uint16_t func_abs(uint16_t d) { return d; }
+static inline uint32_t func_abs(uint32_t d) { return d; }
+static inline uint64_t func_abs(uint64_t d) { return d; }
+static inline int8_t func_abs(int8_t d) { return std::abs(d); }
+static inline int16_t func_abs(int16_t d) { return std::abs(d); }
+static inline int32_t func_abs(int32_t d) { return std::abs(d); }
+static inline int64_t func_abs(int64_t d) { return std::llabs(d); }
+
+static inline int32_t func_sgn(uint8_t v) {
+    if (v)
+        return 1;
+    else
+        return 0;
+}
+
+static inline int32_t func_sgn(int8_t v) {
+    if (v) {
+        if (v > 0)
+            return 1;
+        else
+            return -1;
+    }
+    return 0;
+}
+
+static inline int32_t func_sgn(uint16_t v) {
+    if (v)
+        return 1;
+    else
+        return 0;
+}
+
+static inline int32_t func_sgn(int16_t v) {
+    if (v) {
+        if (v > 0)
+            return 1;
+        else
+            return -1;
+    }
+    return 0;
+}
+
+static inline int32_t func_sgn(uint32_t v) {
+    if (v)
+        return 1;
+    else
+        return 0;
+}
+
+static inline int32_t func_sgn(int32_t v) {
+    if (v) {
+        if (v > 0)
+            return 1;
+        else
+            return -1;
+    }
+    return 0;
+}
+
+static inline int32_t func_sgn(uint64_t v) {
+    if (v)
+        return 1;
+    else
+        return 0;
+}
+
+static inline int32_t func_sgn(int64_t v) {
+    if (v) {
+        if (v > 0)
+            return 1;
+        else
+            return -1;
+    }
+    return 0;
+}
+
+static inline int32_t func_sgn(float v) {
+    if (v) {
+        if (v > 0)
+            return 1;
+        else
+            return -1;
+    }
+    return 0;
+}
+
+static inline int32_t func_sgn(double v) {
+    if (v) {
+        if (v > 0)
+            return 1;
+        else
+            return -1;
+    }
+    return 0;
+}
+
+static inline int32_t func_sgn(long double v) {
+    if (v) {
+        if (v > 0)
+            return 1;
+        else
+            return -1;
+    }
+    return 0;
+}
diff --git a/internal/c/libqb/src/math.cpp b/internal/c/libqb/src/math.cpp
new file mode 100644
index 000000000..66a103c25
--- /dev/null
+++ b/internal/c/libqb/src/math.cpp
@@ -0,0 +1,47 @@
+
+#include "libqb-common.h"
+
+#include <math.h>
+
+#include "error_handle.h"
+#include "qbmath.h"
+
+double func_log(double value) {
+    if (value <= 0) {
+        error(5);
+        return 0;
+    }
+    return std::log(value);
+}
+
+// FIX
+double func_fix_double(double value) {
+    if (value < 0)
+        return std::ceil(value);
+    else
+        return std::floor(value);
+}
+
+long double func_fix_float(long double value) {
+    if (value < 0)
+        return std::ceil(value);
+    else
+        return std::floor(value);
+}
+
+// EXP
+double func_exp_single(double value) {
+    if (value <= 88.02969) {
+        return std::exp(value);
+    }
+    error(6);
+    return 0;
+}
+
+long double func_exp_float(long double value) {
+    if (value <= 709.782712893) {
+        return std::exp(value);
+    }
+    error(6);
+    return 0;
+}
diff --git a/internal/c/qbx.cpp b/internal/c/qbx.cpp
index ceb1a5efa..ba156d0fb 100755
--- a/internal/c/qbx.cpp
+++ b/internal/c/qbx.cpp
@@ -10,6 +10,7 @@
 #include "font.h"
 #include "gui.h"
 #include "image.h"
+#include "qbmath.h"
 #include "qbs.h"
 #include "qbs-mk-cv.h"
 #include "error_handle.h"
@@ -372,11 +373,6 @@ extern void sub_graphics_put(float x1f, float y1f, void *element, int32 option,
                              uint32 mask, int32 passed);
 extern int32 func_csrlin();
 extern int32 func_pos(int32 ignore);
-extern double func_log(double value);
-extern double func_fix_double(double value);
-extern long double func_fix_float(long double value);
-extern double func_exp_single(double value);
-extern long double func_exp_float(long double value);
 extern void sub_sleep(int32 seconds, int32 passed);
 extern qbs *func__bin(int64 value, int32 neg_bits);
 extern qbs *func__bin_float(long double value);
@@ -387,18 +383,6 @@ extern qbs *func_hex_float(long double value);
 extern ptrszint func_lbound(ptrszint *array, int32 index, int32 num_indexes);
 extern ptrszint func_ubound(ptrszint *array, int32 index, int32 num_indexes);
 
-extern int32 func_sgn(uint8 v);
-extern int32 func_sgn(int8 v);
-extern int32 func_sgn(uint16 v);
-extern int32 func_sgn(int16 v);
-extern int32 func_sgn(uint32 v);
-extern int32 func_sgn(int32 v);
-extern int32 func_sgn(uint64 v);
-extern int32 func_sgn(int64 v);
-extern int32 func_sgn(float v);
-extern int32 func_sgn(double v);
-extern int32 func_sgn(long double v);
-
 extern int32 func_inp(int32 port);
 extern void sub_wait(int32 port, int32 andexpression, int32 xorexpression,
                      int32 passed);
@@ -645,19 +629,6 @@ void swap_block(void *a, void *b, uint32 bytes) {
 }
 
 
-// force abs to return floating point numbers correctly
-inline double func_abs(double d) { return std::fabs(d); }
-inline long double func_abs(long double d) { return std::fabs(d); }
-inline float func_abs(float d) { return std::fabs(d); }
-
-inline uint8 func_abs(uint8 d) { return d; }
-inline uint16 func_abs(uint16 d) { return d; }
-inline uint32 func_abs(uint32 d) { return d; }
-inline uint64 func_abs(uint64 d) { return d; }
-inline int8 func_abs(int8 d) { return std::abs(d); }
-inline int16 func_abs(int16 d) { return std::abs(d); }
-inline int32 func_abs(int32 d) { return std::abs(d); }
-inline int64 func_abs(int64 d) { return std::llabs(d); }
 
 extern int32 disableEvents;