5.4.8. SYS_ISERROR (0x08)

Determines whether the return code from another semihosting call is an error status or not. This call is passed a parameter block containing the error code to examine.


On entry, r1 contains a pointer to a one-word data block:

word 1

This is the required status word to check.


On exit, r0 contains:

  • 0 if the status word is not an error indication

  • a nonzero value if the status word is an error indication.

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