kvisc/vm/pc/DECD

52 lines
1.2 KiB
Plaintext
Raw Normal View History

2019-06-07 22:23:38 +02:00
# The OS/K Team licenses this file to you under the MIT license.
# See the LICENSE file in the project root for more information.
Instruction encoding:
15 0 15 0
xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx
2019-07-01 21:46:36 +02:00
│││└───────────┘ │└───┘└───┘└───┘
│││ INSTR. │ FT3 FT2 FT1
│││ │
LMC R
2019-06-07 22:23:38 +02:00
M No more words
2019-07-01 21:46:36 +02:00
C COND suffix
L LOCK suffix
R REP suffix
2019-06-08 07:47:08 +02:00
FT1 First operand format
FT2 Second operand format
2019-06-07 22:23:38 +02:00
Values for COND:
00000 (none)
2019-07-22 14:41:50 +02:00
00001 .C .B
2019-06-07 22:23:38 +02:00
00010 .O
00011 .Z .E
00100 .S
00101 .P
2019-07-22 14:41:50 +02:00
00110 .BE
00111 .L
01000 .LE
01001 .AXZ
01010 .BXZ
01011 .CXZ
01100 .DXZ
2019-06-07 22:23:38 +02:00
Highest (6th) bit of COND indicates negation
Fx values:
2019-06-12 15:30:35 +02:00
00000 (none)
00001 reg
00010 imm64
2019-06-07 22:23:38 +02:00
xxx00 [imm64]
2019-06-08 07:47:08 +02:00
xxx01 [reg+reg] code(reg)|code(reg)
2019-06-07 22:23:38 +02:00
xxx10 [reg+reg+imm16] code(reg)|code(reg) imm16
xxx11 [reg+reg*imm16+imm16] code(reg)|code(reg) imm16 imm16
Where xxx is:
001 8-bit access
010 16-bit access
011 32-bit access
100 64-bit access