X86-64 Instruction Encoding: Revision history

25 June 2024

• curprev 16:1916:19, 25 June 2024‎ Lukflug talk contribs‎ m 32,940 bytes 0‎ 1 revision imported: import new edits from osdev.org wiki

24 June 2024

• curprev 15:1315:13, 24 June 2024‎ osdev>Mlechu‎ m 32,940 bytes −1‎ Remove apostrophe

9 July 2023

• curprev 05:0805:08, 9 July 2023‎ osdev>Khaledhammouda‎ 32,941 bytes +20‎ No edit summary

6 August 2021

• curprev 12:4312:43, 6 August 2021‎ osdev>Unprotectedmode‎ 32,921 bytes +487‎ →‎Encoding
• curprev 12:3112:31, 6 August 2021‎ osdev>Unprotectedmode‎ 32,434 bytes +213‎ →‎Three byte XOP escape prefix

17 February 2021

• curprev 20:3120:31, 17 February 2021‎ osdev>Solomonu‎ 32,221 bytes −597‎ →‎Operand-size and address-size override prefix: Condense operand and address size table

8 February 2021

• curprev 03:2603:26, 8 February 2021‎ osdev>Solomonu‎ 32,818 bytes −30‎ →‎External References: Update AMD manual URL

12 April 2014

• curprev 01:4601:46, 12 April 2014‎ osdev>Virtlink‎ 32,848 bytes +240‎ →‎Operand-size and address-size override prefix: Added colors
• curprev 01:3001:30, 12 April 2014‎ osdev>Virtlink‎ 32,608 bytes +428‎ →‎SIB: Better layout
• curprev 01:2801:28, 12 April 2014‎ osdev>Virtlink‎ 32,180 bytes +432‎ →‎ModR/M: Better layout
• curprev 01:2701:27, 12 April 2014‎ osdev>Virtlink‎ 31,748 bytes +1,049‎ →‎VEX/XOP opcodes: Better layout
• curprev 01:2301:23, 12 April 2014‎ osdev>Virtlink‎ 30,699 bytes +301‎ →‎Encoding: Better layout.
• curprev 01:1901:19, 12 April 2014‎ osdev>Virtlink‎ 30,398 bytes +453‎ →‎Operand-size and address-size override prefix: Fixed error in table for Real/Virtual mode. Better layout
• curprev 00:5600:56, 12 April 2014‎ osdev>Virtlink‎ 29,945 bytes +979‎ →‎Registers: Updated table layout. Removed leading 'b' from binary numbers.

27 July 2012

• curprev 23:0623:06, 27 July 2012‎ osdev>Virtlink‎ 28,966 bytes −8‎ →‎Registers: Renamed x87 to ST
• curprev 23:0223:02, 27 July 2012‎ osdev>Virtlink‎ 28,974 bytes −32‎ →‎Registers
• curprev 22:5822:58, 27 July 2012‎ osdev>Virtlink‎ 29,006 bytes +149‎ →‎Registers: Added x87 registers

22 July 2012

• curprev 12:1912:19, 22 July 2012‎ osdev>Virtlink‎ 28,857 bytes +54‎ Fixed square brackets. An expression surrounded by square brackets means: take the value at the memory address of the value of the expression

21 July 2012

• curprev 14:5414:54, 21 July 2012‎ osdev>Virtlink‎ 28,803 bytes +151‎ →‎32/64-bit addressing: Added info and link

18 July 2012

• curprev 00:2900:29, 18 July 2012‎ osdev>Virtlink‎ m 28,652 bytes 0‎ →‎Operand-size and address-size override prefix
• curprev 00:2800:28, 18 July 2012‎ osdev>Virtlink‎ m 28,652 bytes +2‎ →‎VEX/XOP opcodes
• curprev 00:0900:09, 18 July 2012‎ osdev>Virtlink‎ 28,650 bytes +75‎ →‎Immediate
• curprev 00:0800:08, 18 July 2012‎ osdev>Virtlink‎ 28,575 bytes +156‎ →‎Displacement
• curprev 00:0600:06, 18 July 2012‎ osdev>Virtlink‎ 28,419 bytes +2‎ →‎32/64-bit addressing: Link fix
• curprev 00:0500:05, 18 July 2012‎ osdev>Virtlink‎ 28,417 bytes −72‎ →‎32/64-bit addressing: Link fix
• curprev 00:0400:04, 18 July 2012‎ osdev>Virtlink‎ m 28,489 bytes −1‎ →‎32/64-bit addressing: Table nr fix
• curprev 00:0300:03, 18 July 2012‎ osdev>Virtlink‎ m 28,490 bytes 0‎ →‎Operand-size and address-size override prefix: Table nr fix
• curprev 00:0300:03, 18 July 2012‎ osdev>Virtlink‎ m 28,490 bytes −1‎ →‎Registers: Table nr fix
• curprev 00:0200:02, 18 July 2012‎ osdev>Virtlink‎ 28,491 bytes +7‎ →‎Operand-size and address-size override prefix: Linkfix
• curprev 00:0100:01, 18 July 2012‎ osdev>Virtlink‎ 28,484 bytes +1,820‎ Paste ''Registers''
• curprev 00:0000:00, 18 July 2012‎ osdev>Virtlink‎ 26,664 bytes −1,823‎ →‎Registers: Moved

17 July 2012

• curprev 23:5923:59, 17 July 2012‎ osdev>Virtlink‎ 28,487 bytes +365‎ →‎ModR/M and SIB bytes: Added RIP/EIP info
• curprev 23:5923:59, 17 July 2012‎ osdev>Virtlink‎ 28,122 bytes −36,312‎ →‎Addressing modes: The new tables at SIB and ModR/M replace these
• curprev 23:5823:58, 17 July 2012‎ osdev>Virtlink‎ 64,434 bytes +9,908‎ →‎ModR/M and SIB bytes: Added tables
• curprev 23:3823:38, 17 July 2012‎ osdev>Virtlink‎ 54,526 bytes +178‎ →‎ModR/M and SIB bytes: New version
• curprev 14:3514:35, 17 July 2012‎ osdev>Virtlink‎ 54,348 bytes +780‎ →‎64-bit SIB byte: New version
• curprev 14:2714:27, 17 July 2012‎ osdev>Virtlink‎ m 53,568 bytes +6‎ →‎ModR/M
• curprev 14:2614:26, 17 July 2012‎ osdev>Virtlink‎ 53,562 bytes +446‎ →‎SIB: New version
• curprev 14:2314:23, 17 July 2012‎ osdev>Virtlink‎ 53,116 bytes +367‎ →‎ModR/M
• curprev 14:1114:11, 17 July 2012‎ osdev>Virtlink‎ 52,749 bytes +106‎ →‎Registers: Added YMM registers
• curprev 14:0714:07, 17 July 2012‎ osdev>Virtlink‎ m 52,643 bytes +30‎ →‎Three byte XOP escape prefix: Link fix
• curprev 14:0614:06, 17 July 2012‎ osdev>Virtlink‎ m 52,613 bytes +28‎ →‎Three byte VEX escape prefix: Link fix
• curprev 14:0514:05, 17 July 2012‎ osdev>Virtlink‎ m 52,585 bytes 0‎ →‎REX prefix: Link fix
• curprev 14:0514:05, 17 July 2012‎ osdev>Virtlink‎ 52,585 bytes −931‎ →‎REX prefix: Moved to 'Opcode'
• curprev 14:0414:04, 17 July 2012‎ osdev>Virtlink‎ 53,516 bytes +7,010‎ →‎Opcode: New version
• curprev 14:0014:00, 17 July 2012‎ osdev>Virtlink‎ 46,506 bytes +47‎ →‎Legacy Prefixes: New version
• curprev 13:5913:59, 17 July 2012‎ osdev>Virtlink‎ 46,459 bytes −196‎ →‎General Overview: New version

16 July 2012

• curprev 21:4321:43, 16 July 2012‎ osdev>Virtlink‎ m 46,655 bytes +3‎ Lowercase x
• curprev 16:2816:28, 16 July 2012‎ osdev>Virtlink‎ m 46,652 bytes 0‎ →‎RIP/EIP-relative addressing: typo

6 July 2012

• curprev 23:4923:49, 6 July 2012‎ osdev>Virtlink‎ 46,652 bytes +1,427‎ →‎32-bit addressing: Added REX byte to 32-bit