OpcodeLogic

Note: round brackets, instead of square brackets, are used to represent an optional component. This is to avoid confusion with memory operands which are surrounded by square brackets.

Also, immea and composite operand may be mentioned in the parts below. Please visit these two links for more information regarding their meaning.

Logic And Shift Instructions

LOP

Instruction usage

LOP.op reg0, (~)reg1, (~)composite operand;

Template opcode

1100 000000 1110 000000 000000 0000000000000000000000 0000000000 010110
        mod        reg0   reg1                  immea       mod2

mod 2:3	meaning
00	.AND
10	.OR
01	.XOR
11	.PASS_B

mod 1	meaning
0	default
1	~composite operand

mod 0	meaning
0	default
1	~reg1

---

LOP32I

Usage:

LOP32I.op reg0, (~)reg1, 0xabcd;

Template opcode

0100 000000 1110 000000 000000 00000000000000000000000000000000 011100
        mod        reg0   reg1                           0xabcd

mod 2:3	meaning
00	.AND
10	.OR
01	.XOR
11	.PASS_B

mod 0	meaning
0	default
1	~reg1

---

SHR

Instruction usage

SHR(.U32)(.W) reg0(.CC), reg1, composite operand;

Template opcode

1100 010000 1110 000000 000000 0000000000000000000000 0000000000 011010
        mod        reg0   reg1                  immea       mod2

mod 0	meaning
0	default
1	.W

mod 4	meaning
0	.U32
1	default

mod2 9	meaning
0	default
1	.CC on reg0

---

SHL

Instruction usage

SHL(.U32)(.W) reg0(.CC), reg1, composite operand;

Template opcode

1100 010000 1110 000000 000000 0000000000000000000000 0000000000 000110
        mod        reg0   reg1                  immea       mod2

mod and mo2 are the same as in SHR

---

BFE

Instruction usage:

BFE(.U32)(.BREV) reg0(.CC), reg1, composite operand

The composite operand should be a 16-bit number. The higher 8 bits indicate the length of the field, and the lower 8 bits indicate the starting bit of the field.

1100 010000 1110 000000 000000 0000000000000000000000 0000000000 001110
        mod        reg0   reg1                  immea       mod2

mod 1	meaning
0	default
1	.BREV

mod 4	meaning
0	.U32
1	default

mod2 9	meaning
0	default
1	reg0.CC

---

BFI

Instruction usage:

BFI reg0(.CC), reg1, composite operand, reg3;

Template opcode

1100 000000 1110 000000 000000 0000000000000000000000    0  000000  000 010100
        mod        reg0   reg1                 immea mod2   reg3 mod2 

mod2 0	meaning
0	default
1	reg0.CC

---

SEL

Instruction usage:

SEL reg0, reg1, composite operand, (!)p;

Template opcode

0010 000000 1110 000000 000000 0000000000000000000000 0 0000 00000 000100
        mod        reg0   reg1                  immea      p