VR4102 datasheet(87/701 Pages) NEC

87 / 701 page

CHAPTER 3 CPU INSTRUCTION SET SUMMARY

Table 3-5. ALU Immediate Instruction (Extended ISA)

Instruction

Format and Description

Doubleword Add

Immediate

DADDI rt, rs, immediate

The 16-bit immediate is sign extended to 64 bits and then added to the contents of register rs to form a

64-bit result. The result is stored into register rt.

An exception occurs on the generation of integer overflow.

Doubleword Add

Immediate Unsigned

DADDIU rt, rs, immediate

The 16-bit immediate is sign extended to 64 bits and then added to the contents of register rs to form a

64-bit result. The result is stored into register rt.

No exception occurs on the generation of overflow.

Table 3-6. Three Operand Type Instruction

Instruction

Format and Description

Add

ADD rd, rs, rt

The contents of registers rs and rt are added together to form a 32-bit result. The result is stored into

generation of integer overflow.

Add Unsigned

ADDU rd, rs, rt

The contents of registers rs and rt are added together to form a 32-bit result. The result is stored into

generation of integer overflow.

Subtract

SUB rd, rs, rt

The contents of register rt are subtracted from the contents of register rs. The 32-bit result is stored

into register rd. In the 64-bit mode, the operand must be sign extended. An exception occurs on the

generation of integer overflow.

Subtract Unsigned

SUBU rd, rs, rt

The contents of register rt are subtracted from the contents of register rs. The 32-bit result is stored

into register rd. In the 64-bit mode, the operand must be sign extended. No exception occurs on the

generation of integer overflow.

Set On Less Than

SLT rd, rs, rt

The contents of registers rs and rt are compared, treating both operands as signed integers. If the

contents of register rs is less than that of register rt, the result is set to 1; otherwise, the result is set to

0. The result is stored to register rd.

Set On Less Than

Unsigned

SLTU rd, rs, rt

The contents of registers rs and rt are compared treating both operands as unsigned integers. If the

contents of register rs is less than that of register rt, the result is set to 1; otherwise, the result is set to

0. The result is stored to register rd.

And

AND rd, rt, rs

The contents of register rs are logical ANDed with that of general register rt bit-wise. The result is

stored to register rd.

OR rd, rt, rs

The contents of register rs are logical ORed with that of general register rt bit-wise. The result is stored

to register rd.

Exclusive Or

XOR rd, rt, rs

The contents of register rs are logical Ex-ORed with that of general register rt bit-wise. The result is

stored to register rd.

Nor

NOR rd, rt, rs

The contents of register rs are logical NORed with that of general register rt bit-wise. The result is

stored to register rd.

immediate

funct

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