HPFMOVEDATALTOR
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Syntax
I64 @64 @64 I32
HPFMOVEDATALTOR (count, source_ptr, target_ptr, status);
Parameters
- count
64-bit signed integer by reference (required)
The count parameter allows the caller to specify the number of bytes to move from the source buffer to the target buffer.
- source_ptr
64-bit pointer by value (required)
The source_ptr can be a 64-bit pointer to any valid object that the calling process has access to. The buffer may be in the caller's stack, heap, or obtained by opening a file with user mapped access
- target_ptr
64-bit pointer by value (required)
The target_ptr can be a 64-bit pointer to any valid object that the calling process has access to. The buffer may be in the caller's stack, heap, or obtained by opening a file with user mapped access.
- status
32-bit signed integer by reference (optional)
Returns the status of the HPFMOVEDATALTOR call. If no errors or warnings are encountered, status returns 32 bits of zero. If errors or warnings are encountered, status is interpretted as two 16-bit fields. Bits (0:16) comprise status.info. A negative value indicates an error condition, and a positive value indicates a warning condition. Bits (16:16) comprise status.subsys. The value represents the subsystem that set the status information.
Operation Notes
This intrinsic is especially useful when the source and target buffers are overlapping. The HPFMOVEDATALTOR intrinsic is typically used when the target buffer's address is to the left (smaller) of the source buffer's address. Moving the data from the left to the right ensures that the data in the source buffer is copied to the target buffer before it is overwritten itself.
Related Information
| Intrinsics | HPFADDTOPOINTER, HPFFILLDATA, HPFMOVEDATA, HPFMOVEDATARTOL |
| Manuals | Accessing Files Programmer's Guide |
|
HPFMOVEDATA |
HPFMOVEDATARTOL |