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45 lines
1.7 KiB
45 lines
1.7 KiB
4 years ago
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#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php.
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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# Module Name:
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#
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# MultU64x64.S
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#
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# Abstract:
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#
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# Calculate the product of a 64-bit integer and another 64-bit integer
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#
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(InternalMathMultU64x64)
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#------------------------------------------------------------------------------
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# UINT64
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# EFIAPI
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# InternalMathMultU64x64 (
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# IN UINT64 Multiplicand,
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# IN UINT64 Multiplier
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# );
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#------------------------------------------------------------------------------
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ASM_PFX(InternalMathMultU64x64):
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push %ebx
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movl 8(%esp), %ebx # ebx <- M1[0..31]
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movl 16(%esp), %edx # edx <- M2[0..31]
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movl %ebx, %ecx
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movl %edx, %eax
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imull 20(%esp), %ebx # ebx <- M1[0..31] * M2[32..63]
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imull 12(%esp), %edx # edx <- M1[32..63] * M2[0..31]
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addl %edx, %ebx # carries are abandoned
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mull %ecx # edx:eax <- M1[0..31] * M2[0..31]
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addl %ebx, %edx # carries are abandoned
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pop %ebx
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ret
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