Index: llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp
===================================================================
--- llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -1049,6 +1049,7 @@
     .Cases("BYTE", "byte", 8)
     .Cases("WORD", "word", 16)
     .Cases("DWORD", "dword", 32)
+    .Cases("FWORD", "fword", 48)
     .Cases("QWORD", "qword", 64)
     .Cases("MMWORD","mmword", 64)
     .Cases("XWORD", "xword", 80)
Index: llvm/trunk/test/MC/X86/intel-syntax.s
===================================================================
--- llvm/trunk/test/MC/X86/intel-syntax.s
+++ llvm/trunk/test/MC/X86/intel-syntax.s
@@ -746,3 +746,6 @@
 loopnz _foo
 // CHECK: loope _foo
 // CHECK: loopne _foo
+
+sidt fword ptr [eax]
+// CHECK: sidtq (%eax)