58 lines
1.4 KiB
Markdown
58 lines
1.4 KiB
Markdown
# General
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## 2 argument instructions (t6)
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### add, or, adc, sbb, and, sub, xor, cmp;
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- REG REG // This means that arg1 can only be REG or MEM.
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- REG MEM // And arg2 can only be REG, MEM or IMM, but:
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- REG IMM // You can't use MEM as both arguments.
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- MEM REG // This limitation stems from x64 encoding.
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- MEM IMM // Hardware we use can't encode that.
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- REG or MEM can use D8 ... D64, any size.
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- IMM in this case must be maximum 32 bit.
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- Examples:
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```c
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add rax 0x11223344 // ADD D64 REG R0 IMM 0x11223344
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or ecx 0x11223344 // OR D32 REG R1 IMM 0x11223344
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adc dx 0x1122 // ADC D16 REG R2 IMM 0x1122
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sbb bl 0x11 // SBB D8 REG R3 IMM 0x11
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```
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## 1 argument instructions (t4)
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### inc, dec, not, neg, mul, imul, div, idiv;
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- REG
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- MEM
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- REG or MEM can use D8 ... D64, any size.
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- IMM can't be used with these instructions.
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- Examples:
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```c
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inc rsp // INC D64 REG R4
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dec ebp // DEC D32 REG R5
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not si // NOT D16 REG R6
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neg dil // NEG D8 REG R7
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```
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# Examples
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```c
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sysenter // SYSENTER
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sysexit // SYSEXIT
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syscall // SYSCALL
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sysret // SYSRET
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mov eax ebx // MOV D32 REG R0 REG R3
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mov eax [x] // MOV D32 REG R0 MEM 69
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mov eax 0x11223344 // MOV D32 REG R0 IMM 0x11223344
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mov [x] eax // MOV D32 MEM 69 REG R0
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mov [x] 0x11223344 // MOV D32 MEM 69 IMM 0x11223344
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mov eax x // MOV D32 REG R0 REL 69
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...
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u32 x = 420 // ASMDIRMEM 69 ASMDIRIMM D32 420
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```
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