Nintendo Ultra64 Programmer's Manual page 234

VADD
31
COP2
0 1 0 0 1 0
6
Format:
vadd vd, vs, vt
vadd vd, vs, vt[e]
Description:
The 16-bit elements of vector register
of vector register
The results are clamped to 16 bit signed values and placed into vector register
If an element specification
used as described below.
234
Vector Add
of Short Elements
26 25 24 21 20
1 e
1 4
vs
. The vector control register VCO is used as carry in; and VCO is cleared.
e
is present for vector register
16 15 11 10
vt vs
5 5
vt are added on an element-by-element basis to the elements
VADD
6 5
vd VADD
0 1 0 0 0 0
5 6
vd
vt
, the selected scalar element(s) of
0
.
vt
is