A CPU Instruction Set Details

DDIVU rs, rt

Description:

The contents of general register rs are divided by the contents of general register rt, treating both operands as unsigned values. No integer overflow exception occurs under any circumstances, and the result of this operation is undefined when the divisor is zero.

This instruction is typically followed by additional instructions to check for a zero divisor.

When the operation completes, the quotient word of the double result is loaded into special register LO, and the remainder word of the double result is loaded into special register HI.

If either of the two preceding instructions is MFHI or MFLO, the results of those instructions are undefined. Correct operation requires separating reads of HI or LO from writes by two or more instructions.

This operation is only defined for the R4000 operating in 64-bit mode. Execution of this instruction in 32-bit mode causes a reserved instruction exception.

Operation:

Exceptions:

Reserved instruction exception (R4000 in 32-bit mode)

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