diff --git a/test/test_by_xed.py b/test/test_by_xed.py
index 1e84c6ae..13d695c1 100644
--- a/test/test_by_xed.py
+++ b/test/test_by_xed.py
@@ -76,7 +76,7 @@ def newReg(s):
   return s
 
 class Memory:
-  def __init__(self, size=0, base=None, index=None, scale=0, disp=0, broadcast=False):
+  def __init__(self, size=0, base=None, index=None, scale=0, disp=0, broadcast=0):
     self.size = size
     self.base = newReg(base)
     self.index = newReg(index)
@@ -85,8 +85,12 @@ def __init__(self, size=0, base=None, index=None, scale=0, disp=0, broadcast=Fal
     self.broadcast = broadcast
 
   def __str__(self):
-    s = 'ptr' if self.size == 0 else g_sizeTbl[int(math.log2(self.size))]
-    if self.broadcast:
+    if self.size == 0:
+      s = 'ptr'
+    else:
+      idx = self.size * max(self.broadcast, 1)
+      s = g_sizeTbl[int(math.log2(idx))]
+    if self.broadcast > 0:
       s += '_b'
     s += ' ['
     needPlus = False
@@ -107,23 +111,36 @@ def __str__(self):
     s += ']'
     return s
 
+  # Xbyak uses 'ptr' when it can be automatically detected, so we should consider this in the comparison.
   def __eq__(self, rhs):
-    # xbyak uses ptr if it is automatically detected, so xword == ptr is true
-    if self.broadcast != rhs.broadcast: return False
-#    if not self.broadcast and 0 < self.size <= 8 and 0 < rhs.size <= 8 and self.size != rhs.size: return False
-    if not self.broadcast and self.size > 0 and rhs.size > 0 and self.size != rhs.size: return False
+    if self.broadcast > rhs.broadcast:
+      return rhs == self
+    assert(self.broadcast <= rhs.broadcast)
+    if self.broadcast == 0:
+      if rhs.broadcast > 0: return False
+      # Xbyak uses 'ptr' when it is automatically detected.
+      # Therefore, the comparison is true if 'ptr' (i.e., size = 0) is used.
+      if 0 < self.size and 0 < rhs.size and self.size != rhs.size: return False
+    if self.broadcast == 1: # _b
+      if rhs.broadcast == 1: # compare ptr_b with ptr_b
+        if self.size != rhs.size:
+          return False
+      if self.size > 0 and (self.size != rhs.size * rhs.broadcast): # compare ptr_b with {1toX}
+        return False
+    else:
+      if self.broadcast != rhs.broadcast: return False
     r = self.base == rhs.base and self.index == rhs.index and self.scale == rhs.scale and self.disp == rhs.disp
     return r
 
 def parseBroadcast(s):
   if '_b' in s:
-    return (s.replace('_b', ''), True)
-  r = re.search(r'({1to\d+})', s)
+    return (s.replace('_b', ''), 1)
+  r = re.search(r'({1to(\d+)})', s)
   if not r:
-    return (s, False)
-  return (s.replace(r.group(1), ''), True)
+    return (s, 0)
+  return (s.replace(r.group(1), ''), int(r.group(2)))
 
-def parseMemory(s, broadcast=False):
+def parseMemory(s, broadcast=0):
   org_s = s
 
   s = s.replace(' ', '').lower()
@@ -133,7 +150,7 @@ def parseMemory(s, broadcast=False):
   scale = 0
   disp = 0
 
-  if not broadcast:
+  if broadcast == 0:
     (s, broadcast) = parseBroadcast(s)
 
   # Parse size
@@ -157,7 +174,7 @@ def parseMemory(s, broadcast=False):
     s = s[3:]
 
   if s.startswith('_b'):
-    broadcast = True
+    broadcast = 1
     s = s[2:]
 
   # Extract the content inside brackets
@@ -335,7 +352,7 @@ def parseMemoryTest():
     ('[]', Memory()),
     ('[rax]', Memory(0, rax)),
     ('ptr[rax]', Memory(0, rax)),
-    ('ptr_b[rax]', Memory(0, rax, broadcast=True)),
+    ('ptr_b[rax]', Memory(0, rax, broadcast=1)),
     ('dword[rbx]', Memory(4, rbx)),
     ('xword ptr[rcx]', Memory(16, rcx)),
     ('xmmword ptr[rcx]', Memory(16, rcx)),
@@ -344,11 +361,36 @@ def parseMemoryTest():
     ('[0x12345]', Memory(0, None, None, 0, 0x12345)),
     ('yword [rax+rdx*4]', Memory(32, rax, rdx, 4)),
     ('zword [rax+rdx*4+123]', Memory(64, rax, rdx, 4, 123)),
+    ('xword_b [rax]', Memory(16, rax, None, 0, 0, 1)),
+    ('dword [rax]{1to4}', Memory(16, rax, None, 0, 0, 1)),
+    ('yword_b [rax]', Memory(32, rax, None, 0, 0, 1)),
+    ('dword [rax]{1to8}', Memory(32, rax, None, 0, 0, 1)),
   ]
   for (s, expected) in tbl:
     my = parseMemory(s)
     assertEqualStr(my, expected)
 
+  print('compare test')
+  tbl = [
+    ('ptr[rax]', 'dword[rax]', True),
+    ('byte[rax]', 'dword[rax]', False),
+    ('yword_b[rax]', 'dword [rax]{1to8}', True),
+    ('yword_b[rax]', 'word [rax]{1to16}', True),
+    ('zword_b[rax]', 'word [rax]{1to32}', True),
+    ('zword_b[rax]', 'word [rax]{1to16}', False),
+    ('dword [rax]{1to2}', 'dword [rax] {1to4}', False),
+    ('zword_b[rax]', 'xword_b [rax]', False),
+    ('ptr_b[rax]', 'word [rax]{1to32}', True), # ignore size
+  ]
+  for (lhs, rhs, eq) in tbl:
+    a = parseMemory(lhs)
+    b = parseMemory(rhs)
+    if eq:
+      assertEqual(a, b)
+      assertEqual(b, a)
+    else:
+      assert(parseMemory(lhs) != parseMemory(rhs))
+
 def parseNmemonicTest():
   print('parseNmemonicTest')
   tbl = [
@@ -364,8 +406,8 @@ def parseNmemonicTest():
     ('vpcompressw(zmm30 | k2 |T_z, zmm1);', Nmemonic('vpcompressw', [zmm30, zmm1], [k2, T_z])),
     ('vpcompressw zmm30{k2}{z}, zmm1', Nmemonic('vpcompressw', [zmm30, zmm1], [k2, T_z])),
     ('vpshldw(xmm9|k3|T_z, xmm2, ptr [rax + 0x40], 5);', Nmemonic('vpshldw', [xmm9, xmm2, Memory(0, rax, None, 0, 0x40), 5], [k3, T_z])),
-    ('vpshrdd(xmm5|k3|T_z, xmm2, ptr_b [rax + 0x40], 5);', Nmemonic('vpshrdd', [xmm5, xmm2, Memory(0, rax, None, 0, 0x40, True), 5], [k3, T_z])),
-    ('vpshrdd xmm5{k3}{z}, xmm2, dword ptr [rax+0x40]{1to4}, 0x5', Nmemonic('vpshrdd', [xmm5, xmm2, Memory(0, rax, None, 0, 0x40, True), 5], [k3, T_z])),
+    ('vpshrdd(xmm5|k3|T_z, xmm2, ptr_b [rax + 0x40], 5);', Nmemonic('vpshrdd', [xmm5, xmm2, Memory(0, rax, None, 0, 0x40, 1), 5], [k3, T_z])),
+    ('vpshrdd xmm5{k3}{z}, xmm2, dword ptr [rax+0x40]{1to4}, 0x5', Nmemonic('vpshrdd', [xmm5, xmm2, Memory(0, rax, None, 0, 0x40, 4), 5], [k3, T_z])),
     ('vcmpph(k1, xmm15, ptr[rax+64], 1);', Nmemonic('vcmpph', [k1, xmm15, Memory(0, rax, None, 0, 64), 1])),
   ]
   for (s, expected) in tbl: