VR4102 datasheet(89/701 Pages) NEC

89 / 701 page

CHAPTER 3 CPU INSTRUCTION SET SUMMARY

Table 3-9. Shift Instruction (Extended ISA)

Instruction

Format and Description

Doubleword Shift Left

Logical

DSLL rd, rs, sa

The contents of register rt are shifted left by sa bits and zeros are inserted into the emptied lower bits.

The 64-bit result is stored into register rd.

Doubleword Shift

Right Logical

DSRL rd, rs, sa

The contents of register rt are shifted right by sa bits and zeros are inserted into the emptied higher

bits. The 64-bit result is stored into register rd.

Doubleword Shift

Right Arithmetic

DSRA rd, rt, sa

The contents of register rt are shifted right by sa bits and the emptied higher bits are sign extended.

The 64-bit result is stored into register rd.

Doubleword Shift Left

Logical Variable

DSLLV rd, rt, rs

The contents of register rt are shifted left and zeros are inserted into the emptied lower bits. The lower

six bits of register rs specify the shift count. The 64-bit result is stored into register rd.

Doubleword Shift

Right Logical Variable

DSRLV rd, rt, rs

The contents of register rt are shifted right and zeros are inserted into the emptied higher bits. The

lower six bits of register rs specify the shift count. The 64-bit result is stored into register rd.

Doubleword Shift

Right Arithmetic

Variable

DSRAV rd, rt, rs

The contents of register rt are shifted right and the emptied higher bits are sign extended. The lower six

bits of register rs specify the shift count. The 64-bit result is stored into register rd.

Doubleword Shift Left

Logical + 32

DSLL32 rd, rt, sa

The contents of register rt are shifted left by 32 + sa bits and zeros are inserted into the emptied lower

bits. The 64-bit result is stored into register rd.

Doubleword Shift

Right Logical + 32

DSRL32 rd, rt, sa

The contents of register rt are shifted right by 32 + sa bits and zeros are inserted into the emptied

higher bits. The 64-bit result is stored into register rd.

Doubleword Shift

Right Arithmetic + 32

DSRA32 rd, rt, sa

The contents of register rt are shifted right by 32 + sa bits and the emptied higher bits are sign

extended. The 64-bit result is stored into register rd.

funct

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