
APPENDIX A MIPS III INSTRUCTION SET DETAILS
Preliminary User’s Manual S15543EJ1V0UM
531
MTHI
Move To HI
rs
SPECIAL
0 0 0 0 0 0
MTHI
0 1 0 0 0 1
0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
31 26 25 21 20 6 5 0
65 615
MTHI
Format:
MTHI rs
Description:
The contents of general register
rs
are loaded into special register
HI
.
If a MTHI operation is executed following a MULT, MULTU, DIV, or DIVU instruction, but before any MFLO, MFHI,
MTLO, or MTHI instructions, the contents of special register
HI
are undefined.
Operation:
32, 64 T-2:
HI ← undefined
T-1:
HI ← undefined
T:
HI ← GPR [rs]
Exceptions:
None
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