projects / mirror_edk2.git / blame
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|---|---|---|
| f15f4aef JJ |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r | |
| 4 | ; This program and the accompanying materials\r | |
| 5 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
| 6 | ; which accompanies this distribution. The full text of the license may be found at\r | |
| 7 | ; http://opensource.org/licenses/bsd-license.php.\r | |
| 8 | ;\r | |
| 9 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 10 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 11 | ;\r | |
| 12 | ; Module Name:\r | |
| 13 | ;\r | |
| 14 | ; MultU64x64.nasm\r | |
| 15 | ;\r | |
| 16 | ; Abstract:\r | |
| 17 | ;\r | |
| 18 | ; Calculate the product of a 64-bit integer and another 64-bit integer\r | |
| 19 | ;\r | |
| 20 | ;------------------------------------------------------------------------------\r | |
| 21 | \r | |
| 22 | SECTION .text\r | |
| 23 | \r | |
| 24 | ;------------------------------------------------------------------------------\r | |
| 25 | ; UINT64\r | |
| 26 | ; EFIAPI\r | |
| 27 | ; InternalMathMultU64x64 (\r | |
| 28 | ; IN UINT64 Multiplicand,\r | |
| 29 | ; IN UINT64 Multiplier\r | |
| 30 | ; );\r | |
| 31 | ;------------------------------------------------------------------------------\r | |
| 32 | global ASM_PFX(InternalMathMultU64x64)\r | |
| 33 | ASM_PFX(InternalMathMultU64x64):\r | |
| 34 | push ebx\r | |
| 35 | mov ebx, [esp + 8] ; ebx <- M1[0..31]\r | |
| 36 | mov edx, [esp + 16] ; edx <- M2[0..31]\r | |
| 37 | mov ecx, ebx\r | |
| 38 | mov eax, edx\r | |
| 39 | imul ebx, [esp + 20] ; ebx <- M1[0..31] * M2[32..63]\r | |
| 40 | imul edx, [esp + 12] ; edx <- M1[32..63] * M2[0..31]\r | |
| 41 | add ebx, edx ; carries are abandoned\r | |
| 42 | mul ecx ; edx:eax <- M1[0..31] * M2[0..31]\r | |
| 43 | add edx, ebx ; carries are abandoned\r | |
| 44 | pop ebx\r | |
| 45 | ret\r | |
| 46 | \r |