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Document experimental support for multi-image language features #176

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flang/docs/FortranStandardsSupport: Document experimental support for…
bonachea Jan 24, 2026
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flang/docs/ParallelMultiImageFortranRuntime: Document known implement…
bonachea Jan 24, 2026
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21 changes: 10 additions & 11 deletions flang/docs/FortranStandardsSupport.md
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Expand Up @@ -67,25 +67,24 @@ the multi-image execution. The table entries are based on the document [The new
| Feature | Status | Comments |
|------------------------------------------------------------|--------|---------------------------------------------------------|
| Asynchronous communication | P | Syntax is accepted |
| Teams | N | Multi-image/Coarray feature |
| Image failure | P | Multi-image/Coarray feature. stat_failed_image is added |
| Form team statement | N | Multi-image/Coarray feature |
| Change team construct | N | Multi-image/Coarray feature |
| Collective subroutines | P | Experimental support via [PRIF](ParallelMultiImageFortranRuntime.md), missing co_reduce |
| Teams | P | Experimental support via [PRIF](ParallelMultiImageFortranRuntime.md) |
| Form team statement | P | Experimental support via [PRIF](ParallelMultiImageFortranRuntime.md) |
| Change team construct | P | Experimental support via [PRIF](ParallelMultiImageFortranRuntime.md) |
| Sync team construct | P | Experimental support via [PRIF](ParallelMultiImageFortranRuntime.md) |
| Intrinsic functions get_team and team_number | P | Experimental support via [PRIF](ParallelMultiImageFortranRuntime.md) |
| Intrinsic function image_index | P | Experimental support via [PRIF](ParallelMultiImageFortranRuntime.md) |
| Intrinsic function num_images | P | Experimental support via [PRIF](ParallelMultiImageFortranRuntime.md) |
| Intrinsic function this_image | P | Experimental support via [PRIF](ParallelMultiImageFortranRuntime.md) |
| Image failure and stat= specifiers | P | Multi-image/Coarray feature. stat_failed_image is added |
| Coarrays allocated in teams | N | Multi-image/Coarray feature |
| Critical construct | N | Multi-image/Coarray feature |
| Lock and unlock statements | N | Multi-image/Coarray feature |
| Events | N | Multi-image/Coarray feature |
| Sync team construct | N | Multi-image/Coarray feature |
| Image selectors | N | Multi-image/Coarray feature |
| Intrinsic functions get_team and team_number | N | Multi-image/Coarray feature |
| Intrinsic function image_index | N | Multi-image/Coarray feature |
| Intrinsic function num_images | N | Multi-image/Coarray feature |
| Intrinsic function this_image | N | Multi-image/Coarray feature |
| Intrinsic move_alloc extensions | P | Multi-image/Coarray feature |
| Detecting failed and stopped images | N | Multi-image/Coarray feature |
| Collective subroutines | N | Multi-image/Coarray feature |
| New and enhanced atomic subroutines | N | Multi-image/Coarray feature |
| Failed images and stat= specifiers | N | Multi-image/Coarray feature |
| Intrinsic function coshape | N | Multi-image/Coarray feature |

## Fortran 2008
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5 changes: 5 additions & 0 deletions flang/docs/ParallelMultiImageFortranRuntime.md
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Expand Up @@ -15,3 +15,8 @@ Fortran's multi-image parallel features.

The current revision of the PRIF specification is here:
<https://doi.org/10.25344/S46S3W>

Library implementations of PRIF include:

* [Caffeine](https://go.lbl.gov/caffeine) - portable open-source implementation targeting shared- and distributed-memory systems running Linux or macOS