mirror of https://github.com/acidanthera/audk.git
43 lines
979 B
NASM
43 lines
979 B
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2016, 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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; Module Name:
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;
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; MathLShiftS64.nasm
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;
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; Abstract:
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;
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; 64-bit Math Worker Function.
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; Shifts a 64-bit signed value left by a certain number of bits.
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;
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;------------------------------------------------------------------------------
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SECTION .text
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global ASM_PFX(__ashldi3)
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;------------------------------------------------------------------------------
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;
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; void __cdecl __ashldi3 (void)
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;
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;------------------------------------------------------------------------------
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ASM_PFX(__ashldi3):
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cmp cl,0x40
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jnc ReturnZero
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cmp cl,0x20
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jnc More32
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shld edx,eax,cl
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shl eax,cl
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ret
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More32:
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mov edx,eax
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xor eax,eax
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and cl,0x1f
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shl edx,cl
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ret
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ReturnZero:
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xor eax,eax
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xor edx,edx
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ret
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