7.14 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.

Entry

On entry, R1 contains a pointer to a one-word data block:
word 1
The required status word to check.

Return

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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