[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EdkIIGlueLib / Library / BaseLib / Ia32 / MultU64x64.asm

; Copyright (c) 2004, Intel Corporation                                                         \r
; All rights reserved. This program and the accompanying materials                          \r
; are licensed and made available under the terms and conditions of the BSD License         \r
; which accompanies this distribution.  The full text of the license may be found at        \r
; http://opensource.org/licenses/bsd-license.php                                            \r
;                                                                                           \r
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.    \r
;\r
; Module Name:\r
;\r
;   MultU64x64.asm\r
;\r
; Abstract:\r
;\r
;   Calculate the product of a 64-bit integer and another 64-bit integer\r
;\r
;------------------------------------------------------------------------------\r
\r
    .386\r
    .model  flat,C\r
    .code\r
\r
;------------------------------------------------------------------------------\r
; UINT64\r
; EFIAPI\r
; InternalMathMultU64x64 (\r
;   IN      UINT64                    Multiplicand,\r
;   IN      UINT64                    Multiplier\r
;   );\r
;------------------------------------------------------------------------------\r
InternalMathMultU64x64  PROC    USES    ebx\r
    mov     ebx, [esp + 8]              ; ebx <- M1[0..31]\r
    mov     edx, [esp + 16]             ; edx <- M2[0..31]\r
    mov     ecx, ebx\r
    mov     eax, edx\r
    imul    ebx, [esp + 20]             ; ebx <- M1[0..31] * M2[32..63]\r
    imul    edx, [esp + 12]             ; edx <- M1[32..63] * M2[0..31]\r
    add     ebx, edx                    ; carries are abandoned\r
    mul     ecx                         ; edx:eax <- M1[0..31] * M2[0..31]\r
    add     edx, ebx                    ; carries are abandoned\r
    ret\r
InternalMathMultU64x64  ENDP\r
\r
    END\r
Commit	Line	Data
3eb9473e	1	; Copyright (c) 2004, Intel Corporation \r
	2	; All rights reserved. This program and the accompanying materials \r
	3	; are licensed and made available under the terms and conditions of the BSD License \r
	4	; which accompanies this distribution. The full text of the license may be found at \r
	5	; http://opensource.org/licenses/bsd-license.php \r
	6	; \r
	7	; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
	8	; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
	9	;\r
	10	; Module Name:\r
	11	;\r
	12	; MultU64x64.asm\r
	13	;\r
	14	; Abstract:\r
	15	;\r
	16	; Calculate the product of a 64-bit integer and another 64-bit integer\r
	17	;\r
	18	;------------------------------------------------------------------------------\r
	19	\r
	20	.386\r
	21	.model flat,C\r
	22	.code\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	InternalMathMultU64x64 PROC USES ebx\r
	33	mov ebx, [esp + 8] ; ebx <- M1[0..31]\r
	34	mov edx, [esp + 16] ; edx <- M2[0..31]\r
	35	mov ecx, ebx\r
	36	mov eax, edx\r
	37	imul ebx, [esp + 20] ; ebx <- M1[0..31] * M2[32..63]\r
	38	imul edx, [esp + 12] ; edx <- M1[32..63] * M2[0..31]\r
	39	add ebx, edx ; carries are abandoned\r
	40	mul ecx ; edx:eax <- M1[0..31] * M2[0..31]\r
	41	add edx, ebx ; carries are abandoned\r
	42	ret\r
	43	InternalMathMultU64x64 ENDP\r
	44	\r
	45	END\r