[flang] Question about REAL_KINDS

[DanielCChen]

Consider the following code:

USE, INTRINSIC :: ISO_FORTRAN_ENV
IMPLICIT NONE

print*,REAL_KINDS

END

Flang outputs

2 3 4 8

It seems not correct to me.
Is the output expected?

[llvmbot]

@llvm/issue-subscribers-flang-frontend

Author: Daniel Chen (DanielCChen)

Consider the following code: ``` USE, INTRINSIC :: ISO_FORTRAN_ENV IMPLICIT NONE

print*,REAL_KINDS

END

Flang outputs 

2 3 4 8

It seems not correct to me.
Is the output expected?
</details>

[DanielCChen]

@klausler Could you please take a look and see if the output is correct?

[klausler]

It depends on the target characteristics defined by the driver. These values would be correct for a target that supported 16-bit IEEE, 16-bit "brain float" (bfloat16), 32-bit IEEE, and 64-bit IEEE, but not 128-bit IEEE.

[DanielCChen]

Ok. Thanks for the explanation.