What does R124 represent?

Accelerated Computing CUDA CUDA Programming and Performance
1

Anybody knows the meaning of R124 in the output of decuda or cuobjdump?
Thanks.

2

Anybody knows the meaning of R124 in the output of decuda or cuobjdump?
Thanks.

3

For sm_1x, R124 is used as the zero register.

4

For sm_1x, R124 is used as the zero register.

5

Thank you. External Image

6

Thank you. External Image