1 files changed, 42 insertions, 0 deletions
diff --git a/roms/edk2/CryptoPkg/Library/IntrinsicLib/Ia32/MathLShiftS64.nasm b/roms/edk2/CryptoPkg/Library/IntrinsicLib/Ia32/MathLShiftS64.nasm
new file mode 100644
index 000000000..056b5b1fb
--- /dev/null
+++ b/roms/edk2/CryptoPkg/Library/IntrinsicLib/Ia32/MathLShiftS64.nasm
@@ -0,0 +1,42 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+;   MathLShiftS64.nasm
+;
+; Abstract:
+;
+;   64-bit Math Worker Function.
+;   Shifts a 64-bit signed value left by a certain number of bits.
+;
+;------------------------------------------------------------------------------
+
+    SECTION .text
+
+global ASM_PFX(__ashldi3)
+;------------------------------------------------------------------------------
+;
+; void __cdecl __ashldi3 (void)
+;
+;------------------------------------------------------------------------------
+ASM_PFX(__ashldi3):
+    cmp cl,0x40
+    jnc ReturnZero
+    cmp cl,0x20
+    jnc More32
+    shld edx,eax,cl
+    shl eax,cl
+    ret
+More32:
+    mov edx,eax
+    xor eax,eax
+    and cl,0x1f
+    shl edx,cl
+    ret
+ReturnZero:
+    xor eax,eax
+    xor edx,edx
+    ret