Next: _gfortran_caf_co_min, Previous: _gfortran_caf_co_broadcast, Up: Function ABI Documentation [Contents][Index]
_gfortran_caf_co_max
— Collective maximum reductionCalculates for each array element of the variable a the maximum value for that element in the current team; if result_image has the value 0, the result shall be stored on all images, otherwise, only on the specified image. This function operates on numeric values and character strings.
void _gfortran_caf_co_max (gfc_descriptor_t *a, int result_image,
int *stat, char *errmsg, int a_len, size_t errmsg_len)
a | intent(inout) An array descriptor for the data to be processed. On the destination image(s) the result overwrites the old content. |
result_image | intent(in) The ID of the image to which the reduced value should be copied to; if zero, it has to be copied to all images. |
stat | intent(out) Stores the status STAT= and may be NULL. |
errmsg | intent(out) When an error occurs, this will be set to an error message; may be NULL. |
a_len | intent(in) the string length of argument a |
errmsg_len | intent(in) the buffer size of errmsg |
If result_image is nonzero, the data in the array descriptor a on all images except of the specified one become undefined; hence, the library may make use of this.