diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/CryptoPkg/Library/IntrinsicLib/Ia32/MathRShiftU64.nasm | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/CryptoPkg/Library/IntrinsicLib/Ia32/MathRShiftU64.nasm')
| -rw-r--r-- | roms/edk2/CryptoPkg/Library/IntrinsicLib/Ia32/MathRShiftU64.nasm | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/roms/edk2/CryptoPkg/Library/IntrinsicLib/Ia32/MathRShiftU64.nasm b/roms/edk2/CryptoPkg/Library/IntrinsicLib/Ia32/MathRShiftU64.nasm new file mode 100644 index 000000000..1d51a4dfa --- /dev/null +++ b/roms/edk2/CryptoPkg/Library/IntrinsicLib/Ia32/MathRShiftU64.nasm @@ -0,0 +1,43 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+; MathRShiftU64.nasm
+;
+; Abstract:
+;
+; 64-bit Math Worker Function.
+; Shifts a 64-bit unsigned value right by a certain number of bits.
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+;------------------------------------------------------------------------------
+;
+; void __cdecl __ashrdi3 (void)
+;
+;------------------------------------------------------------------------------
+global ASM_PFX(__ashrdi3)
+ASM_PFX(__ashrdi3):
+ cmp cl,0x40
+ jnc _Exit
+ cmp cl,0x20
+ jnc More32
+ shrd eax,edx,cl
+ shr edx,cl
+ ret
+More32:
+ mov eax,edx
+ xor edx,edx
+ and cl,0x1f
+ shr eax,cl
+ ret
+_Exit:
+ xor eax,eax
+ xor edx,edx
+ ret
+
|