💬 ชาวเน็ตแห่แชร์: NVIDIA/cccl/pull/

davebayer · 2025-03-20T14:49:59Z

This PR implements internal fp properties module.

copy-pr-bot · 2025-03-20T14:50:02Z

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miscco · 2025-03-20T15:13:57Z

+// __fp_exp_nbits_v
+
+template <__fp_format _Fmt>
+inline constexpr int __fp_exp_nbits_v = 0;


I am wondering whether this is something we want to derive from numeric_limits

There are some fundamental differences between the variables defined here and in numeric_limits. Example:

the numeric_limits::digits does not specify if the type has the implict bit or not

the numeric_limits::min_exponent and numeric_limits::max_exponent are defined in a different way than the actual minimum and maximum exponent values

For these reasons I've decided to implement our own fp properties. We can then use them to simplify the implementation of numeric_limits by a lot

Also, I am trying to avoid circular dependencies because __cccl_fp requires conversion rank which requires numeric_limits which requires __fp_from_storage which requires __cccl_fp

miscco · 2025-03-20T15:14:08Z

/ok to test

github-actions · 2025-03-20T17:17:46Z

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  🟩 GCC13              Pass: 100%/6   | Total: 31m 05s | Avg:  5m 10s | Max: 11m 33s | Hits:  95%/3510  
  🟩 MSVC14.39          Pass: 100%/1   | Total: 10m 40s | Avg: 10m 40s | Max: 10m 40s | Hits:  87%/282   
  🟩 MSVC14.42          Pass: 100%/1   | Total: 10m 13s | Avg: 10m 13s | Max: 10m 13s | Hits:  87%/282   
  🟩 NVHPC25.1          Pass: 100%/2   | Total: 14m 50s | Avg:  7m 25s | Max:  7m 40s | Hits:  90%/754   
🟩 cxx_family
  🟩 Clang              Pass: 100%/8   | Total: 43m 49s | Avg:  5m 28s | Max: 12m 22s | Hits:  95%/4682  
  🟩 GCC                Pass: 100%/10  | Total: 57m 56s | Avg:  5m 47s | Max: 12m 52s | Hits:  95%/5852  
  🟩 MSVC               Pass: 100%/2   | Total: 20m 53s | Avg: 10m 26s | Max: 10m 40s | Hits:  87%/564   
  🟩 NVHPC              Pass: 100%/2   | Total: 14m 50s | Avg:  7m 25s | Max:  7m 40s | Hits:  90%/754   
🟩 gpu
  🟩 h100               Pass: 100%/2   | Total: 15m 22s | Avg:  7m 41s | Max: 11m 33s | Hits:  97%/1170  
  🟩 rtx2080            Pass: 100%/20  | Total:  2h 02m | Avg:  6m 06s | Max: 12m 52s | Hits:  94%/10682 
🟩 jobs
  🟩 Build              Pass: 100%/19  | Total:  1h 40m | Avg:  5m 17s | Max: 10m 40s | Hits:  94%/10097 
  🟩 Test               Pass: 100%/3   | Total: 36m 47s | Avg: 12m 15s | Max: 12m 52s | Hits:  99%/1755  
🟩 sm
  🟩 90                 Pass: 100%/3   | Total: 19m 04s | Avg:  6m 21s | Max: 11m 33s | Hits:  96%/1755  
  🟩 90a                Pass: 100%/1   | Total:  3m 48s | Avg:  3m 48s | Max:  3m 48s | Hits:  94%/585   
🟩 std
  🟩 17                 Pass: 100%/4   | Total: 19m 14s | Avg:  4m 48s | Max:  7m 40s | Hits:  94%/2132  
  🟩 20                 Pass: 100%/18  | Total:  1h 58m | Avg:  6m 34s | Max: 12m 52s | Hits:  95%/9720

🟩 stdpar: Pass: 100%/4 | Total: 17m 35s | Avg: 4m 23s | Max: 5m 05s

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total:  9m 52s | Avg:  4m 56s | Max:  5m 05s
  🟩 arm64              Pass: 100%/2   | Total:  7m 43s | Avg:  3m 51s | Max:  3m 55s
🟩 ctk
  🟩 12.6               Pass: 100%/4   | Total: 17m 35s | Avg:  4m 23s | Max:  5m 05s
🟩 cudacxx
  🟩 nvcc12.6           Pass: 100%/4   | Total: 17m 35s | Avg:  4m 23s | Max:  5m 05s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/4   | Total: 17m 35s | Avg:  4m 23s | Max:  5m 05s
🟩 cxx
  🟩 NVHPC25.1          Pass: 100%/4   | Total: 17m 35s | Avg:  4m 23s | Max:  5m 05s
🟩 cxx_family
  🟩 NVHPC              Pass: 100%/4   | Total: 17m 35s | Avg:  4m 23s | Max:  5m 05s
🟩 gpu
  🟩 rtx2080            Pass: 100%/4   | Total: 17m 35s | Avg:  4m 23s | Max:  5m 05s
🟩 jobs
  🟩 Build              Pass: 100%/4   | Total: 17m 35s | Avg:  4m 23s | Max:  5m 05s
🟩 std
  🟩 17                 Pass: 100%/2   | Total:  8m 35s | Avg:  4m 17s | Max:  4m 47s
  🟩 20                 Pass: 100%/2   | Total:  9m 00s | Avg:  4m 30s | Max:  5m 05s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 18m 59s | Avg: 9m 29s | Max: 16m 17s | Hits: 96%/320

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total: 18m 59s | Avg:  9m 29s | Max: 16m 17s | Hits:  96%/320   
🟩 ctk
  🟩 12.8               Pass: 100%/2   | Total: 18m 59s | Avg:  9m 29s | Max: 16m 17s | Hits:  96%/320   
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/2   | Total: 18m 59s | Avg:  9m 29s | Max: 16m 17s | Hits:  96%/320   
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/2   | Total: 18m 59s | Avg:  9m 29s | Max: 16m 17s | Hits:  96%/320   
🟩 cxx
  🟩 GCC13              Pass: 100%/2   | Total: 18m 59s | Avg:  9m 29s | Max: 16m 17s | Hits:  96%/320   
🟩 cxx_family
  🟩 GCC                Pass: 100%/2   | Total: 18m 59s | Avg:  9m 29s | Max: 16m 17s | Hits:  96%/320   
🟩 gpu
  🟩 rtx2080            Pass: 100%/2   | Total: 18m 59s | Avg:  9m 29s | Max: 16m 17s | Hits:  96%/320   
🟩 jobs
  🟩 Build              Pass: 100%/1   | Total:  2m 42s | Avg:  2m 42s | Max:  2m 42s | Hits:  94%/160   
  🟩 Test               Pass: 100%/1   | Total: 16m 17s | Avg: 16m 17s | Max: 16m 17s | Hits:  98%/160

🟩 python: Pass: 100%/1 | Total: 1h 10m | Avg: 1h 10m | Max: 1h 10m

🟩 cpu
  🟩 amd64              Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 ctk
  🟩 12.8               Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 cxx
  🟩 GCC13              Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 cxx_family
  🟩 GCC                Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 gpu
  🟩 rtx2080            Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 jobs
  🟩 Test               Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m

👃 Inspect Changes

Modifications in project?

	Project
	CCCL Infrastructure
+/-	libcu++
	CUB
	Thrust
	CUDA Experimental
	stdpar
	python
	CCCL C Parallel Library
	Catch2Helper

Modifications in project or dependencies?

	Project
	CCCL Infrastructure
+/-	libcu++
+/-	CUB
+/-	Thrust
+/-	CUDA Experimental
+/-	stdpar
+/-	python
+/-	CCCL C Parallel Library
+/-	Catch2Helper

🏃‍ Runner counts (total jobs: 162)

#	Runner
113	`linux-amd64-cpu16`
15	`windows-amd64-cpu16`
12	`linux-arm64-cpu16`
8	`linux-amd64-gpu-rtx2080-latest-1`
6	`linux-amd64-gpu-rtxa6000-latest-1`
5	`linux-amd64-gpu-h100-latest-1`
3	`linux-amd64-gpu-rtx4090-latest-1`

Implement fp properties

a7b7014

davebayer requested a review from a team as a code owner March 20, 2025 14:49

davebayer requested a review from griwes March 20, 2025 14:50

github-project-automation Bot added this to CCCL Mar 20, 2025

github-project-automation Bot moved this to Todo in CCCL Mar 20, 2025

cccl-authenticator-app Bot moved this from Todo to In Review in CCCL Mar 20, 2025

miscco approved these changes Mar 20, 2025

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miscco reviewed Mar 20, 2025

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miscco merged commit 810b189 into NVIDIA:main Mar 20, 2025

github-project-automation Bot moved this from In Review to Done in CCCL Mar 20, 2025

davebayer added a commit to davebayer/cccl that referenced this pull request Apr 7, 2025

Implement fp properties (NVIDIA#4213)

9cea50f

davebayer deleted the fp_properties branch February 17, 2026 17:01

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Implement fp properties - #4213

Implement fp properties#4213
miscco merged 1 commit into
NVIDIA:mainfrom
davebayer:fp_properties

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🟩 cub: Pass: 100%/45 | Total: 1d 17h | Avg: 55m 17s | Max: 1h 26m | Hits: 30%/53780

🟩 thrust: Pass: 100%/45 | Total: 1d 02h | Avg: 34m 56s | Max: 1h 09m | Hits: 56%/79911

🟩 libcudacxx: Pass: 100%/43 | Total: 8h 27m | Avg: 11m 47s | Max: 36m 30s | Hits: 81%/106759

🟩 cudax: Pass: 100%/22 | Total: 2h 17m | Avg: 6m 14s | Max: 12m 52s | Hits: 95%/11852

🟩 stdpar: Pass: 100%/4 | Total: 17m 35s | Avg: 4m 23s | Max: 5m 05s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 18m 59s | Avg: 9m 29s | Max: 16m 17s | Hits: 96%/320

🟩 python: Pass: 100%/1 | Total: 1h 10m | Avg: 1h 10m | Max: 1h 10m

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🏃‍ Runner counts (total jobs: 162)

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davebayer commented Mar 20, 2025

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github-actions Bot commented Mar 20, 2025

🟩 cub: Pass: 100%/45 | Total: 1d 17h | Avg: 55m 17s | Max: 1h 26m | Hits: 30%/53780

🟩 thrust: Pass: 100%/45 | Total: 1d 02h | Avg: 34m 56s | Max: 1h 09m | Hits: 56%/79911

🟩 libcudacxx: Pass: 100%/43 | Total: 8h 27m | Avg: 11m 47s | Max: 36m 30s | Hits: 81%/106759

🟩 cudax: Pass: 100%/22 | Total: 2h 17m | Avg: 6m 14s | Max: 12m 52s | Hits: 95%/11852

🟩 stdpar: Pass: 100%/4 | Total: 17m 35s | Avg: 4m 23s | Max: 5m 05s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 18m 59s | Avg: 9m 29s | Max: 16m 17s | Hits: 96%/320

🟩 python: Pass: 100%/1 | Total: 1h 10m | Avg: 1h 10m | Max: 1h 10m

👃 Inspect Changes

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Modifications in project or dependencies?

🏃‍ Runner counts (total jobs: 162)

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