NEC Network Controller uPD98502 - Manual (Page 75)

CHAPTER 2 V R 4120A
Preliminary User’s Manual S15543EJ1V0UM 75
Table 2-12. Multiply/Divide Instructions
Instruction Format and Description
Multiply MULT rs, rt
The contents of registers rt and rs are multiplied, treating both operands as 32-bit signed integers. The
64-bit result is stored into special registers HI and LO. In the 64-bit mode, the operand must be sign
extended.
Multiply Unsigned MULTU rs, rt
The contents of registers rt and rs are multiplied, treating both operands as 32-bit unsigned integers.
The 64-bit result is stored into special registers HI and LO. In the 64-bit mode, the operand must be
sign extended.
Divide DIV rs, rt
The contents of register rs are divided by that of register rt, treating both operands as 32-bit signed
integers. The 32-bit quotient is stored into special register LO, and the 32-bit remainder is stored into
special register HI. In the 64-bit mode, the operand must be sign extended.
Divide Unsigned DIVU rs, rt
The contents of register rs are divided by that of register rt, treating both operands as 32-bit unsigned
integers. The 32-bit quotient is stored into special register LO, and the 32-bit remainder is stored into
special register HI. In the 64-bit mode, the operand must be sign extended.
Move From HI MFHI rd
The contents of special register HI are loaded into register rd.
Move From LO MFLO rd
The contents of special register LO are loaded into register rd.
Move To HI MTHI rs
The contents of register rs are loaded into special register HI.
Move To LO MTLO rs
The contents of register rs are loaded into special register LO.
op rs rt funct rd sa