1 files changed, 50 insertions, 0 deletions
diff --git a/MdePkg/Library/CompilerIntrinsicsLib/Arm/ldivmod.S b/MdePkg/Library/CompilerIntrinsicsLib/Arm/ldivmod.S
new file mode 100644
index 0000000000..15c99c5099
--- /dev/null
+++ b/MdePkg/Library/CompilerIntrinsicsLib/Arm/ldivmod.S
@@ -0,0 +1,50 @@
+//------------------------------------------------------------------------------
+//
+// Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+//------------------------------------------------------------------------------
+
+#include <AsmMacroLib.h>
+
+//
+// A pair of (unsigned) long longs is returned in {{r0, r1}, {r2, r3}},
+//  the quotient in {r0, r1}, and the remainder in {r2, r3}.
+//
+//__value_in_regs lldiv_t
+//EFIAPI
+//__aeabi_ldivmod (
+//  IN UINT64  Dividen
+//  IN UINT64  Divisor
+//  )//
+//
+
+ASM_FUNC(__aeabi_ldivmod)
+    push     {r4,lr}
+    asrs     r4,r1,#1
+    eor      r4,r4,r3,LSR #1
+    bpl      L_Test1
+    rsbs     r0,r0,#0
+    rsc      r1,r1,#0
+L_Test1:
+    tst      r3,r3
+    bpl      L_Test2
+    rsbs     r2,r2,#0
+    rsc      r3,r3,#0
+L_Test2:
+    bl       ASM_PFX(__aeabi_uldivmod)
+    tst      r4,#0x40000000
+    beq      L_Test3
+    rsbs     r0,r0,#0
+    rsc      r1,r1,#0
+L_Test3:
+    tst      r4,#0x80000000
+    beq      L_Exit
+    rsbs     r2,r2,#0
+    rsc      r3,r3,#0
+L_Exit:
+    pop      {r4,pc}
+
+
+