1 files changed, 71 insertions, 0 deletions
diff --git a/MdePkg/Library/CompilerIntrinsicsLib/Arm/ldivmod.asm b/MdePkg/Library/CompilerIntrinsicsLib/Arm/ldivmod.asm
new file mode 100644
index 0000000000..310b2e70db
--- /dev/null
+++ b/MdePkg/Library/CompilerIntrinsicsLib/Arm/ldivmod.asm
@@ -0,0 +1,71 @@
+//------------------------------------------------------------------------------
+//
+// Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+// Copyright (c) 2018, Pete Batard. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+//------------------------------------------------------------------------------
+
+
+    IMPORT  __aeabi_uldivmod
+    EXPORT  __aeabi_ldivmod
+    EXPORT  __rt_sdiv64
+
+    AREA  s___aeabi_ldivmod, CODE, READONLY, ARM
+
+    ARM
+
+;
+;INT64
+;EFIAPI
+;__rt_sdiv64 (
+;  IN  INT64  Divisor
+;  IN  INT64  Dividend
+;  );
+;
+__rt_sdiv64
+    ; 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_ldivmod
+
+;
+;INT64
+;EFIAPI
+;__aeabi_ldivmod (
+;  IN  INT64  Dividend
+;  IN  INT64  Divisor
+;  );
+;
+__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       __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}
+
+    END