|
EXTEND 11110 |
LSB (pos) |
0 |
MSB (pos+size-1) |
SHIFT 00110 |
000 |
ry |
sel = 1 |
SLL 00 |
|
5 |
5 |
1 |
5 |
5 |
3 |
3 |
3 |
2 |
INS ry, $0, pos, size |
MIPS16e2 |
Insert Bit Field 0 Extended |
Insert Bit Field 0 Extended
To merge bits with a value of zero into a specified field GPR ry
GPR[ry] = InsertField(GPR[ry], msb, lsb)
Size bits with a zero are merged into the value from GPR ry starting at bit position pos. The result is placed back in GPR ry.
In implementations prior to MIPS16e2, this instriction yields unpredicable result. It would typically be executed as an SLL instruction. The operation is UNPREDICTABLE if lsb > msb.
if lsb > msb then UNPREDICTABLE endif GPR[XLat[ry]] = GPR[XLat[ry]]31..msb+1 || GPR[XLat[ry]]msb-lsb..0 || GPR[XLat[ry]]lsb-1..0
None
GPR[XLat[ry]] = GPR[XLat[ry]]31..msb+1 || GPR[XLat[ry]]msb-lsb..0 || GPR[XLat[ry]]lsb-1..0
None