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Code  Mnemonic  Description 
2C ib  SUB AL, imm8  Subtract imm8 from AL 
2D iw  SUB AX, imm16  Subtract imm16 from AX 
2D id  SUB EAX, imm32  Subtract imm32 from EAX 
80 /5 ib  SUB r/m8, imm8  Subtract imm8 from r/m8 
81 /5 iw  SUB r/m16, imm16  Subtract imm16 from r/m16 
81 /5 id  SUB r/m32, imm32  Subtract imm32 from r/m32 
83 /5 ib  SUB r/m16, imm8  Subtract signextended imm8 from r/m16 
83 /5 ib  SUB r/m32, imm8  Subtract signextended imm8 from r/m32 
28 / r  SUB r/m8, r8  Subtract r8 from r/m8 
29 / r  SUB r/m16, r16  Subtract r16 from r/m16 
29 / r  SUB r/m32, r32  Subtract r32 from r/m32 
2A / r  SUB r8, r/m8  Subtract r/m8 from r8 
2B / r  SUB r16, r/m16  Subtract r/m16 from r16 
2B / r  SUB r32, r/m32  Subtract r/m32 from r32 
Operands  Bytes  Clocks  
reg, reg  2  1  UV 
mem, reg  2 + d(0, 2)  3  UV 
reg, mem  2 + d(0, 2)  2  UV 
reg, imm  2 + i(1, 2)  1  UV 
mem, imm  2 + d(0, 2) + i(1, 2)  3  UV ( not pairable if there is a displacement and immediate) 
acc, imm  1 + i(1, 2)  1  UV 
ID  unaffected  DF  unaffected 
VIP  unaffected  IF  unaffected 
VIF  unaffected  TF  unaffected 
AC  unaffected  SF  sets according to the result 
VM  unaffected  ZF  sets according to the result 
RF  unaffected  AF  sets according to the result 
NT  unaffected  PF  sets according to the result 
IOPL  unaffected  CF  sets according to the result 
OF  sets according to the result 