diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S b/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S index f4df094195..9ec61b134b 100644 --- a/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S +++ b/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S @@ -1,6 +1,6 @@ #------------------------------------------------------------------------------
#
-# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
@@ -57,22 +57,22 @@ L2: shrl %ecx
jnz L2
divl %ebx
- movl %eax, %ebx # ebx <- quotient
- movl 28(%esp), %ecx # ecx <- high dword of divisor
+ movl %eax, %ebx # ebx <- quotient
+ movl 28(%esp), %ecx # ecx <- high dword of divisor
mull 24(%esp) # edx:eax <- quotient * divisor[0..31]
- imull %ebx, %ecx # ecx <- quotient * divisor[32..63]
- addl %ecx, %edx # edx <- (quotient * divisor)[32..63]
- mov 32(%esp), %ecx # ecx <- addr for Remainder
- jc TooLarge # product > 2^64
- cmpl %edx, %edi # compare high 32 bits
- ja Correct
- jb TooLarge # product > dividend
- cmpl %eax, %esi
- jae Correct # product <= dividend
+ imull %ebx, %ecx # ecx <- quotient * divisor[32..63]
+ addl %ecx, %edx # edx <- (quotient * divisor)[32..63]
+ mov 32(%esp), %ecx # ecx <- addr for Remainder
+ jc TooLarge # product > 2^64
+ cmpl %edx, %edi # compare high 32 bits
+ ja Correct
+ jb TooLarge # product > dividend
+ cmpl %eax, %esi
+ jae Correct # product <= dividend
TooLarge:
- decl %ebx # adjust quotient by -1
- jecxz Return # return if Remainder == NULL
- sub 24(%esp), %eax
+ decl %ebx # adjust quotient by -1
+ jecxz Return # return if Remainder == NULL
+ sub 24(%esp), %eax
sbb 28(%esp), %edx # edx:eax <- (quotient - 1) * divisor
Correct:
jecxz Return
@@ -81,7 +81,7 @@ Correct: movl %esi, (%ecx)
movl %edi, 4(%ecx)
Return:
- movl %ebx, %eax # eax <- quotient
+ movl %ebx, %eax # eax <- quotient
xorl %edx, %edx # quotient is 32 bits long
pop %edi
pop %esi
|