J. EFI Byte Code Virtual Machine Opcode List

The following table lists the opcodes for EBC instructions. Note that opcodes only require 6 bits of the opcode byte of EBC instructions. The other two bits are used for other encodings that are dependent on the particular instruction.

Table J.1 EBC Virtual Machine Opcode Summary

Opcode	Description
0x00	BREAK [break code]
0x01	JMP 32{cs {@}R1 {Immed32
0x02	JMP8 {cs Immed8
0x03	CALL 32{EX}{a} {@}R1 {Immed32
0x04	RET
0x05	CMP [32 R1, {@}R2 {Index16
0x06	CMP [32 R1, {@}R2 {Index16
0x07	CMP [32 R1, {@}R2 {Index16
0x08	CMP [32 R1, {@}R2 {Index16
0x09	CMP [32 R1, {@}R2 {Index16
0x0A	NOT [32 {@}R1, {@}R2 {Index16
0x0B	NEG [32 {@}R1,{@}R2 {Index16
0x0C	ADD [32 {@}R1,{@}R2 {Index16
0x0D	SUB [32 {@}R1,{@}R2 {Index16
0x0E	MUL [32 {@}R1,{@}R2 {Index16
0x0F	MULU [32 {@}R1,{@}R2 {Index16
0x10	DIV [32 {@}R1,{@}R2 {Index16
0x11	DIVU [32 {@}R1,{@}R2 {Index16
0x12	MOD [32 {@}R1,{@}R2 {Index16
0x13	MODU [32 {@}R1,{@}R2 {Index16
0x14	AND [32 {@}R1,{@}R2 {Index16
0x15	OR [32 {@}R1,{@}R2 {Index16
0x16	XOR [32 {@}R1,{@}R2 {Index16
0x17	SHL [32 {@}R1,{@}R2 {Index16
0x18	SHR [32 {@}R1,{@}R2 {Index16
0x19	ASHR [32 {@}R1,{@}R2 {Index16
0x1A	EXTNDB [32 {@}R1, {@}R2 {Index16
0x1B	EXTNDW [32 {@}R1,{@}R2 {Index16
0x1C	EXTNDD [32 {@}R1,{@}R2 {Index16
0x1D	MOV bw {@}R1 {Index16}, {@}R2 {Index16}
0x1E	MOV ww {@}R1 {Index16}, {@}R2 {Index16}
0x1F	MOV dw {@}R1 {Index16}, {@}R2 {Index16}
0x20	MOV qw {@}R1 {Index16}, {@}R2 {Index16}
0x21	MOV bd {@}R1 {Index32}, {@}R2 {Index32}
0x22	MOV wd {@}R1 {Index32}, {@}R2 {Index32}
0x23	MOV dd {@}R1 {Index32}, {@}R2 {Index32}
0x24	MOV qd {@}R1 {Index32}, {@}R2 {Index32}
0x25	MOVsn w {@}R1 {Index16}, {@}R2 {Index16
0x26	MOVsn d {@}R1 {Index32}, {@}R2 {Index32
0x27	Reserved
0x28	MOV qq {@}R1 {Index64}, {@}R2 {Index64}
0x29	LOADSP [Flags], R2
0x2A	STORESP R1, [IP|Flags]
0x2B	PUSH [32 {@}R1 {Index16
0x2C	POP [32 {@}R1 {Index16
0x2D	CMPI [32 {@}R1 {Index16}, Immed16
0x2E	CMPI [32 {@}R1 {Index16}, Immed16
0x2F	CMPI [32 {@}R1 {Index16}, Immed16
0x30	CMPI [32 {@}R1 {Index16}, Immed16
0x31	CMPI [32 {@}R1 {Index16}, Immed16
0x32	MOVn w {@}R1 {Index16}, {@}R2 {Index16}
0x33	MOVn d {@}R1 {Index32}, {@}R2 {Index32}
0x34	Reserved
0x35	PUSHn {@}R1 {Index16
0x36	POPn {@}R1 {Index16
0x37	MOVI [b {@}R1 {Index16}, Immed16
0x38	MOVIn [w {@}R1 {Index16}, Index16
0x39	MOVREL [w {@}R1 {Index16}, Immed16
0x3A	Reserved
0x3B	Reserved
0x3C	Reserved
0x3D	Reserved
0x3E	Reserved
0x3F	Reserved