avoid float functions to compute range mapping for axis adc reading

quantum/process_keycode/process_joystick.c

@@ -114,15 +114,20 @@ bool process_joystick_analogread_quantum() {
         int16_t axis_val = joystick_axes[axis_index].mid_digit;
 #    endif
 
-        // test the converted value against the lower range
-        uint16_t ref        = joystick_axes[axis_index].mid_digit;
-        uint16_t range      = joystick_axes[axis_index].min_digit;
-        int16_t  ranged_val = -127 * fminf(1.f, (axis_val - (float)(ref)) / (range - (float)ref));
-        if (ranged_val > 0) {
-            // the value is in the higher range
-            range      = joystick_axes[axis_index].max_digit;
-            ranged_val = 127 * fminf(1.f, (axis_val - (float)(ref)) / (range - (float)ref));
+        //test the converted value against the lower range
+        int32_t ref = joystick_axes[axis_index].mid_digit;
+        int32_t range = joystick_axes[axis_index].min_digit;
+        int32_t ranged_val = ((axis_val - ref)* -127)/(range - ref) ;
+
+        if (ranged_val > 0){
+            //the value is in the higher range
+            range = joystick_axes[axis_index].max_digit;
+            ranged_val = ((axis_val - ref)* 127)/(range - ref);
         }
+        
+        //clamp the result in the valid range
+        ranged_val = ranged_val<-127 ? -127 : ranged_val;
+        ranged_val = ranged_val>127 ? 127 : ranged_val;
 
         if (ranged_val != joystick_status.axes[axis_index]) {
             joystick_status.axes[axis_index] = ranged_val;