Question

How to change UP (direction) flag in x86 assembly to 1?

score 58 · Answer 1 · 2024-03-28T13:44:25.847000

58

Views

How to change UP (direction) flag in x86 assembly to 1?

Published on 28 March 2024 at 13:44

score 104 · Answer 2 · 2023-09-10T13:17:43.507000

104

Views

Are there any internal descriptions of the RFLAGS 32-63 bits?

Published on 10 September 2023 at 13:17

score 522 · Answer 3 · 2023-09-07T21:18:50.690000

522

Views

How to move the zero flag into a register in x86-64?

Published on 07 September 2023 at 21:18

score 74 · Answer 4 · 2023-05-30T03:46:57.713000

74

Views

In inline asm within C, on x86/x86-64, is the value of the direction flag guaranteed to be cld?

Published on 30 May 2023 at 03:46

score 26 · Answer 5 · 2023-05-17T03:48:40.357000

26

Views

Why eflags register need a PF flag to record even or odd ones in the data?

Published on 17 May 2023 at 03:48

score 51 · Answer 6 · 2023-03-27T23:38:29.907000

51

Views

Why does this subtraction in NASM not set the sign flag?

Published on 27 March 2023 at 23:38

score 256 · Answer 7 · 2023-03-09T00:20:04.493000

256

Views

In this X86 emulator, why is the overflow flag getting set when adding 0xFFFF to 0xFFFF?

Published on 09 March 2023 at 00:20

score 860 · Answer 8 · 2023-01-08T14:33:01.067000

860

Views

Conditions under which EFLAGS flags are set in x86/x64

Published on 08 January 2023 at 14:33

score 238 · Answer 9 · 2022-11-07T03:47:07.960000

238

Views

Why doesn't bitwise NOT affect the ZF bit or any other FLAGS?

Published on 07 November 2022 at 03:47

score 461 · Answer 10 · 2022-09-18T02:33:48.957000

461

Views

Why does the Zero Flag exist?

Published on 18 September 2022 at 02:33

score 149 · Answer 11 · 2022-09-06T13:44:48.613000

149

Views

Overflow flag set to 1 after ROL operation even though it should be undefined

Published on 06 September 2022 at 13:44

score 424 · Answer 12 · 2022-08-27T06:06:35.637000

424

Views

Problem in understanding the overflow flag (OF) as defined by the IMUL instruction

Published on 27 August 2022 at 06:06

score 59 · Answer 13 · 2022-07-30T19:39:05.377000

59

Views

Should Sign Bit be ON for -65535 decimal in Intel 8086 assembly language?

Published on 30 July 2022 at 19:39

score 96 · Answer 14 · 2022-05-17T12:54:15.957000

96

Views

What exactly does BitwiseXNOR mean?

Published on 17 May 2022 at 12:54

score 277 · Answer 15 · 2022-05-04T16:00:39.460000

277

Views

does single step interrupt(01H interrupt) clear TF flag after every instruction?

Published on 04 May 2022 at 16:00

score 135 · Answer 16 · 2022-04-28T13:40:42.047000

135

Views

Assembly pushf,pop commands, sub changig result?

Published on 28 April 2022 at 13:40

score 525 · Answer 17 · 2022-04-06T17:26:27.643000

525

Views

Why is the Overflow-Flag only set when single shifts are used?

Published on 06 April 2022 at 17:26

score 200 · Answer 18 · 2022-01-25T01:12:03.697000

200

Views

How can x86 arithmetic in 8 bit mode and update the flags?

Published on 25 January 2022 at 01:12

score 536 · Answer 19 · 2021-10-10T13:47:05.193000

536

Views

In MASM64, is there an instruction for pushing a 16-bit immediate on the stack?

Published on 10 October 2021 at 13:47

score 124 · Answer 20 · 2021-09-27T21:27:39.643000

124

Views

Shouldn't the AF (auxiliary flag) be set in the example shown below after the execution of the instruction `add al, '3'`?

Published on 27 September 2021 at 21:27

List Question

How to change UP (direction) flag in x86 assembly to 1?

Are there any internal descriptions of the RFLAGS 32-63 bits?

How to move the zero flag into a register in x86-64?

In inline asm within C, on x86/x86-64, is the value of the direction flag guaranteed to be cld?

Why eflags register need a PF flag to record even or odd ones in the data?

Why does this subtraction in NASM not set the sign flag?

In this X86 emulator, why is the overflow flag getting set when adding 0xFFFF to 0xFFFF?

Conditions under which EFLAGS flags are set in x86/x64

Why doesn't bitwise NOT affect the ZF bit or any other FLAGS?

Why does the Zero Flag exist?

Overflow flag set to 1 after ROL operation even though it should be undefined

Problem in understanding the overflow flag (OF) as defined by the IMUL instruction

Should Sign Bit be ON for -65535 decimal in Intel 8086 assembly language?

What exactly does BitwiseXNOR mean?

does single step interrupt(01H interrupt) clear TF flag after every instruction?

Assembly pushf,pop commands, sub changig result?

Why is the Overflow-Flag only set when single shifts are used?

How can x86 arithmetic in 8 bit mode and update the flags?

In MASM64, is there an instruction for pushing a 16-bit immediate on the stack?

Shouldn't the AF (auxiliary flag) be set in the example shown below after the execution of the instruction `add al, '3'`?

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