m_Do_hostIO OK, m_Do_mtx work

configure.py

@@ -100,7 +100,7 @@
     "-maxerrors 1",
     "-nosyspath",
     "-RTTI off",
-    "-fp_contract on",
+    # "-fp_contract on",
     "-str reuse",
     "-multibyte",
     "-i include",
@@ -315,6 +315,8 @@ def ActorRel(rel_name, status):
             # machine
             NonMatching("m_Do/m_Do_main.cpp"),
             NonMatching("m_Do/m_Do_controller_pad.cpp"),
+            Matching   ("m_Do/m_Do_hostIO.cpp"),
+            NonMatching("m_Do/m_Do_mtx.cpp"),
 
             # dolzel
             Matching   ("d/d_com_lib_game.cpp"),

include/MSL_C/math.h

@@ -57,20 +57,19 @@ inline double sqrt_step(double tmpd, float mag) {
     return tmpd * 0.5 * (3.0 - mag * (tmpd * tmpd));
 }
 
-inline float sqrtf(float mag) {
-    if (mag > 0.0f) {
-        double tmpd = __frsqrte(mag);
-        tmpd = sqrt_step(tmpd, mag);
-        tmpd = sqrt_step(tmpd, mag);
-        tmpd = sqrt_step(tmpd, mag);
-        return mag * tmpd;
-    } else if (mag < 0.0) {
-        return NAN;
-    } else if (fpclassify(mag) == 1) {
-        return NAN;
-    } else {
-        return mag;
+extern inline float sqrtf(float x) {
+    static const double _half = .5;
+    static const double _three = 3.0;
+    volatile float y;
+    if (x > 0.0f) {
+        double guess = __frsqrte((double)x);                   // returns an approximation to
+        guess = _half * guess * (_three - guess * guess * x);  // now have 12 sig bits
+        guess = _half * guess * (_three - guess * guess * x);  // now have 24 sig bits
+        guess = _half * guess * (_three - guess * guess * x);  // now have 32 sig bits
+        y = (float)(x * guess);
+        return y;
     }
+    return x;
 }
 
 inline float atan2f(float y, float x) {

include/m_Do/m_Do_hostIO.h

@@ -7,27 +7,36 @@ struct JORReflexible;
 
 class mDoHIO_child_c {
 public:
-    char mName[24];
-    u8 field1_0x18;
-    u8 field2_0x19;
-    u8 field3_0x1a;
-    u8 field4_0x1b;
-    JORReflexible* mReflexible;
+    mDoHIO_child_c() {
+        field_0x18 = 0;
+        mReflexible = NULL;
+    }
+
+    ~mDoHIO_child_c() {}
+
+    /* 0x00 */ char mName[24];
+    /* 0x18 */ u8 field_0x18;
+    /* 0x1C */ JORReflexible* mReflexible;
 };
 
 class mDoHIO_subRoot_c {
 public:
     virtual ~mDoHIO_subRoot_c() {}
 
+    s8 createChild(const char*, JORReflexible*);
+    void deleteChild(s8);
+
 private:
-    mDoHIO_child_c mChild[64];
+    /* 0x4 */ mDoHIO_child_c mChild[64];
 };
 
-class mDoHIO_root_c : public mDoHIO_subRoot_c {
+class mDoHIO_root_c {
 public:
     virtual ~mDoHIO_root_c() {}
 
     void update();
+
+    /* 0x0 */ mDoHIO_subRoot_c m_subroot;
 };
 
 class mDoHIO_entry_c {