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3f8f7fa5 | 1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
2c7e5c2f HT |
3 | # Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r |
4 | # This program and the accompanying materials\r | |
3f8f7fa5 | 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 | # DivU64x64Remainder.asm\r | |
15 | #\r | |
16 | # Abstract:\r | |
17 | #\r | |
18 | # Calculate the quotient of a 64-bit integer by a 64-bit integer and returns\r | |
19 | # both the quotient and the remainder\r | |
20 | #\r | |
21 | #------------------------------------------------------------------------------\r | |
22 | \r | |
8ad319e5 | 23 | #include <EdkIIGlueBase.h>\r |
24 | \r | |
3f8f7fa5 | 25 | .globl ASM_PFX(InternalMathDivRemU64x32), ASM_PFX(InternalMathDivRemU64x64)\r |
26 | \r | |
27 | #------------------------------------------------------------------------------\r | |
28 | # UINT64\r | |
29 | # EFIAPI\r | |
30 | # InternalMathDivRemU64x64 (\r | |
31 | # IN UINT64 Dividend,\r | |
32 | # IN UINT64 Divisor,\r | |
33 | # OUT UINT64 *Remainder OPTIONAL\r | |
34 | # );\r | |
35 | #------------------------------------------------------------------------------\r | |
36 | ASM_PFX(InternalMathDivRemU64x64):\r | |
37 | movl 16(%esp), %ecx\r | |
38 | testl %ecx, %ecx\r | |
39 | jnz Hard\r | |
40 | movl 20(%esp), %ecx\r | |
41 | jecxz L1\r | |
42 | and $0, 4(%ecx)\r | |
43 | movl %ecx, 16(%esp)\r | |
44 | L1:\r | |
45 | jmp ASM_PFX(InternalMathDivRemU64x32)\r | |
46 | Hard:\r | |
47 | push %ebx\r | |
48 | push %esi\r | |
49 | push %edi\r | |
50 | mov 20(%esp), %edx\r | |
51 | mov 16(%esp), %eax\r | |
52 | movl %edx, %edi\r | |
53 | movl %eax, %esi\r | |
54 | mov 24(%esp), %ebx\r | |
55 | L2:\r | |
56 | shrl %edx\r | |
57 | rcrl $1, %eax\r | |
58 | shrdl $1, %ecx, %ebx\r | |
59 | shrl %ecx\r | |
60 | jnz L2\r | |
61 | divl %ebx\r | |
62 | movl %eax, %ebx\r | |
63 | movl 28(%esp), %ecx\r | |
64 | mull 24(%esp)\r | |
65 | imull %ebx, %ecx\r | |
66 | addl %ecx, %edx\r | |
67 | mov 32(%esp), %ecx\r | |
68 | jc TooLarge\r | |
69 | cmpl %edx, %edi\r | |
70 | ja Correct\r | |
71 | jb TooLarge\r | |
72 | cmpl %eax, %esi\r | |
73 | jae Correct\r | |
74 | TooLarge:\r | |
75 | decl %ebx\r | |
76 | jecxz Return\r | |
77 | sub 24(%esp), %eax\r | |
78 | sbb 28(%esp), %edx\r | |
79 | Correct:\r | |
80 | jecxz Return\r | |
81 | subl %eax, %esi\r | |
82 | sbbl %edx, %edi\r | |
83 | movl %esi, (%ecx)\r | |
84 | movl %edi, 4(%ecx)\r | |
85 | Return:\r | |
86 | movl %ebx, %eax\r | |
87 | xorl %edx, %edx\r | |
88 | pop %edi\r | |
89 | pop %esi\r | |
90 | pop %ebx\r | |
91 | ret\r |