ArmPkg/Library/CompilerIntrinsicsLib: Enable VS2017/ARM builds

Introduce CRT assembly replacements for __rt_sdiv, __rt_udiv,
__rt_udiv64, __rt_sdiv64, __rt_srsh (by reusing the RVCT code)
as well as memcpy and memset.
For MSFT compatibility, some of the code needs to be explicitly
forced to ARM, and the /oldit assembly flag needs to be added.
Also, while RVCT_ASM_EXPORT macro invocations have been removed,
the replacement code is designed to be as close as possible to
the one that would have been generated if using the macros.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

ArmPkg/Library/CompilerIntrinsicsLib/Arm/uldiv.asm

@@ -1,6 +1,7 @@
 //------------------------------------------------------------------------------
 //
 // Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+// Copyright (c) 2018, Pete Batard. All rights reserved.<BR>
 //
 // This program and the accompanying materials
 // are licensed and made available under the terms and conditions of the BSD License
@@ -13,9 +14,30 @@
 //------------------------------------------------------------------------------
 
 
+    EXPORT  __aeabi_uldivmod
+    EXPORT  __rt_udiv64
 
+    AREA  s___aeabi_uldivmod, CODE, READONLY, ARM
 
-    INCLUDE AsmMacroExport.inc
+    ARM
+
+;
+;UINT64
+;EFIAPI
+;__rt_udiv64 (
+;  IN  UINT64   Divisor
+;  IN  UINT64   Dividend
+;  )
+;
+__rt_udiv64
+  ; Swap r0-r1 and r2-r3
+  mov     r12, r0
+  mov     r0, r2
+  mov     r2, r12
+  mov     r12, r1
+  mov     r1, r3
+  mov     r3, r12
+  b       __aeabi_uldivmod
 
 ;
 ;UINT64
@@ -25,7 +47,7 @@
 ;  IN  UINT64   Divisor
 ;  )
 ;
- RVCT_ASM_EXPORT __aeabi_uldivmod
+__aeabi_uldivmod
   stmdb   sp!, {r4, r5, r6, lr}
   mov     r4, r1
   mov     r5, r0
@@ -261,7 +283,6 @@ _ll_div0
   b       __aeabi_ldiv0
 
 __aeabi_ldiv0
-  BX        r14
+  bx        r14
 
   END
-