The NEON Busy Register characteristics are:
Enables software to determine if a NEON instruction is executing.
- Usage constraints
a read-only register in Secure state
a read-only register in Non-secure state.
Available in all configurations.
See the register summary in Table 4.15.
Figure 4.22 shows the NEON Busy Register bit assignments
Table 4.49 shows the NEON Busy Register bit assignments.
|||NEON busy||Software can use this to determine if a NEON instruction is executing. This bit is set to 1 if there is a NEON instruction in the NEON pipeline, or in the processor pipeline.|
To access the NEON Busy Register, read the CP15 register with:
MRC p15,0,<Rd>,c15,c1,0; Read NEON Busy Register