7c34237831
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the CryptoPkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
55 lines
1023 B
C
55 lines
1023 B
C
/** @file
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64-bit Math Worker Function.
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The 32-bit versions of C compiler generate calls to library routines
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to handle 64-bit math. These functions use non-standard calling conventions.
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Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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/*
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* Shifts a 64-bit unsigned value right by a certain number of bits.
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*/
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__declspec(naked) void __cdecl
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_aullshr (
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void
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)
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{
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_asm {
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;
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; Checking: Only handle 64bit shifting or more
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;
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cmp cl, 64
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jae _Exit
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;
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; Handle shifting between 0 and 31 bits
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;
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cmp cl, 32
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jae More32
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shrd eax, edx, cl
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shr edx, cl
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ret
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;
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; Handle shifting of 32-63 bits
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;
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More32:
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mov eax, edx
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xor edx, edx
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and cl, 31
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shr eax, cl
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ret
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;
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; Invalid number (less then 32bits), return 0
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;
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_Exit:
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xor eax, eax
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xor edx, edx
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ret
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}
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}
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