diff --git a/silleee.c b/silleee.c
index 9819159..918174d 100644
--- a/silleee.c
+++ b/silleee.c
@@ -7,13 +7,13 @@ silleee silleee_sub(silleee x, silleee y) {
 
 silleee shift_and_round(int val, int bits) {
   static unsigned masks[24]= {
-    0, 1, 3, 7, 0xf, 0x1f, 0x3f, 0x7f, 0xff, 0x1ff, 0x7ff, 0xfff, 0x1fff,
-    0x3fff, 0x7fff, 0xffff, 0x1ffff, 0x3ffff, 0x7ffff, 0xfffff, 0x1fffff,
-    0x3fffff, 0x7fffff
+    0, 1, 3, 7, 0xf, 0x1f, 0x3f, 0x7f, 0xff, 0x1ff, 0x3ff, 0x7ff, 0xfff,
+    0x1fff, 0x3fff, 0x7fff, 0xffff, 0x1ffff, 0x3ffff, 0x7ffff, 0xfffff,
+    0x1fffff, 0x3fffff, 0x7fffff
   };
 
   static unsigned masks_ho[24] = {
-    0, 1, 2, 4, 8, 0x10, 0x20, 0x40, 0x80, 0x100, 0x200, 0x400, 0x8000, 0x1000,
+    0, 1, 2, 4, 8, 0x10, 0x20, 0x40, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000,
     0x2000, 0x4000, 0x8000, 0x10000, 0x20000, 0x40000, 0x80000, 0x100000,
     0x200000, 0x400000
   };
@@ -45,7 +45,7 @@ silleee silleee_add(silleee x, silleee y) {
   if (xexp == 127) {
     if (!xmant) {
       if (yexp == 127) {
-        if(!ymant) return xsign == ysign ? y : 0x7fc0000;
+        if(!ymant) return xsign == ysign ? y : 0x7fc00000;
         else return y;
       }
     } else {
@@ -81,8 +81,8 @@ silleee silleee_add(silleee x, silleee y) {
     ++dexp;
   } else {
     if (dmant) {
-      while (dmant < sign_bit && dexp > -127) {
-        dmant = dmant << 1;
+      while (dmant < 0x800000 && dexp > -127) {
+        dmant <<= 1;
         --dexp;
       }
     } else {