1 files changed, 38 insertions, 0 deletions
diff --git a/MdePkg/Library/CompilerIntrinsicsLib/Arm/mullu.S b/MdePkg/Library/CompilerIntrinsicsLib/Arm/mullu.S
new file mode 100644
index 0000000000..a878f3aaf2
--- /dev/null
+++ b/MdePkg/Library/CompilerIntrinsicsLib/Arm/mullu.S
@@ -0,0 +1,38 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#------------------------------------------------------------------------------
+.text
+
+GCC_ASM_EXPORT(__ARM_ll_mullu)
+GCC_ASM_EXPORT(__aeabi_lmul)
+#
+#INT64
+#EFIAPI
+#__aeabi_lmul (
+#  IN INT64   Multiplicand
+#  IN INT32   Multiplier
+#  );
+#
+ASM_PFX(__ARM_ll_mullu):
+  mov     r3, #0
+# Make upper part of INT64 Multiplier 0 and use __aeabi_lmul
+
+#
+#INT64
+#EFIAPI
+#__aeabi_lmul (
+#  IN INT64   Multiplicand
+#  IN INT64   Multiplier
+#  );
+#
+ASM_PFX(__aeabi_lmul):
+  stmdb   sp!, {lr}
+  mov     lr, r0
+  umull   r0, ip, r2, lr
+  mla     r1, r2, r1, ip
+  mla     r1, r3, lr, r1
+  ldmia   sp!, {pc}