ntdll: Implement RtlU(short|long)ByteSwap() using fastcall bits.

dlls/ntdll/ntdll.spec

@@ -1038,7 +1038,7 @@
 @ stdcall RtlTryAcquireSRWLockShared(ptr)
 @ stdcall RtlTryEnterCriticalSection(ptr)
 @ stdcall RtlUTF8ToUnicodeN(ptr long ptr ptr long)
-@ cdecl -i386 -norelay RtlUlongByteSwap() NTDLL_RtlUlongByteSwap
+@ stdcall -fastcall -arch=i386 -norelay RtlUlongByteSwap(long)
 @ stdcall -fastcall -arch=i386 -norelay RtlUlonglongByteSwap(int64)
 # @ stub RtlUnhandledExceptionFilter2
 # @ stub RtlUnhandledExceptionFilter
@@ -1072,7 +1072,7 @@
 @ stdcall RtlUpperString(ptr ptr)
 @ stub RtlUsageHeap
 @ stdcall -norelay RtlUserThreadStart(ptr ptr)
-@ cdecl -i386 -norelay RtlUshortByteSwap() NTDLL_RtlUshortByteSwap
+@ stdcall -fastcall -arch=i386 -norelay RtlUshortByteSwap(long)
 @ stdcall RtlValidAcl(ptr)
 @ stdcall RtlValidRelativeSecurityDescriptor(ptr long long)
 @ stdcall RtlValidSecurityDescriptor(ptr)

dlls/ntdll/rtl.c

@@ -659,10 +659,10 @@ __ASM_FASTCALL_FUNC(RtlUlonglongByteSwap, 8,
  *  ix86 version takes argument in %ecx. Other systems use the inline version.
  */
 #ifdef __i386__
-__ASM_GLOBAL_FUNC(NTDLL_RtlUlongByteSwap,
-                  "movl %ecx,%eax\n\t"
-                  "bswap %eax\n\t"
-                  "ret")
+__ASM_FASTCALL_FUNC(RtlUlongByteSwap, 4,
+                    "movl %ecx,%eax\n\t"
+                    "bswap %eax\n\t"
+                    "ret")
 #endif
 
 /*************************************************************************
@@ -674,10 +674,10 @@ __ASM_GLOBAL_FUNC(NTDLL_RtlUlongByteSwap,
  *  i386 version takes argument in %cx. Other systems use the inline version.
  */
 #ifdef __i386__
-__ASM_GLOBAL_FUNC(NTDLL_RtlUshortByteSwap,
-                  "movb %ch,%al\n\t"
-                  "movb %cl,%ah\n\t"
-                  "ret")
+__ASM_FASTCALL_FUNC(RtlUshortByteSwap, 4,
+                    "movb %ch,%al\n\t"
+                    "movb %cl,%ah\n\t"
+                    "ret")
 #endif
 
 

dlls/ntoskrnl.exe/ntoskrnl.c

@@ -2188,6 +2188,22 @@ LONG FASTCALL NTOSKRNL_InterlockedIncrement( LONG volatile *dest )
 #ifdef __i386__
 
 /*************************************************************************
+ *           RtlUshortByteSwap   (NTOSKRNL.EXE.@)
+ */
+__ASM_FASTCALL_FUNC(RtlUshortByteSwap, 4,
+                    "movb %ch,%al\n\t"
+                    "movb %cl,%ah\n\t"
+                    "ret")
+
+/*************************************************************************
+ *           RtlUlongByteSwap   (NTOSKRNL.EXE.@)
+ */
+__ASM_FASTCALL_FUNC(RtlUlongByteSwap, 4,
+                    "movl %ecx,%eax\n\t"
+                    "bswap %eax\n\t"
+                    "ret")
+
+/*************************************************************************
  *           RtlUlonglongByteSwap   (NTOSKRNL.EXE.@)
  */
 __ASM_FASTCALL_FUNC(RtlUlonglongByteSwap, 8,

dlls/ntoskrnl.exe/ntoskrnl.exe.spec

@@ -67,9 +67,9 @@
 @ stdcall -fastcall ObfDereferenceObject(ptr)
 @ stdcall -fastcall ObfReferenceObject(ptr)
 @ stub RtlPrefetchMemoryNonTemporal
-@ cdecl -i386 -norelay RtlUlongByteSwap()
+@ stdcall -fastcall -arch=i386 -norelay RtlUlongByteSwap(long)
 @ stdcall -fastcall -arch=i386 -norelay RtlUlonglongByteSwap(int64)
-@ cdecl -i386 -norelay RtlUshortByteSwap()
+@ stdcall -fastcall -arch=i386 -norelay RtlUshortByteSwap(long)
 @ stub WmiGetClock
 @ stub Kei386EoiHelper
 @ stub Kii386SpinOnSpinLock