Data Movement Instructions

move Rdest, Rsrc

Move

Move the contents of Rsrc to Rdest.

The multiply and divide unit produces its result in two additional registers, hi and lo. These instructions move values to and from these registers. The multiply, divide, and remainder instructions described above are pseudoinstructions that make it appear as if this unit operates on the general registers and detect error conditions such as divide by zero or overflow.

mfhi Rdest

Move From hi

mflo Rdest

Move From lo

Move the contents of the hi (lo) register to register Rdest.

mthi Rdest

Move To hi

mtlo Rdest

Move To lo

Move the contents register Rdest to the hi (lo) register.

Coprocessors have their own register sets. These instructions move values between these registers and the CPU's registers.

mfcz Rdest, CPsrc

Move From Coprocessor z

Move the contents of coprocessor z's register CPsrc to CPU register Rdest.

mfc1.d Rdest, FRsrc1

Move Double From Coprocessor 1

Move the contents of floating point registers FRsrc1 and FRsrc1 + 1 to CPU registers Rdest and Rdest + 1.

mtcz Rsrc, CPdest

Move To Coprocessor z

Move the contents of CPU register Rsrc to coprocessor z's register CPdest.