[CI]【Hackathon 10th Spring No.45】SM70/SM75 compile guards follow-up

[r-cloudforge]

Motivation

PR #6488 (merged as -part) introduced T4/V100 compile support but left two registration blocks in cpp_extensions.cc unguarded:

1. 5 cutlass/FP8 ops (lines 1635–1673): .cu sources compile only at SM≥75, but registration is unconditional → linker error on V100 (SM70)
2. 7 tail MoE/MLA ops (lines 1890–1925): sources compile only at SM≥80, registration unconditional → linker error on SM70/SM75

This is a minimal, additive-only fix — 4 lines added, 0 lines removed. See PR #6941 for a full wholesale replacement alternative.

Modifications

• custom_ops/gpu_ops/cpp_extensions.cc: Add #ifdef ENABLE_SM75_EXT_OPS / #endif around 5 cutlass/FP8 ops. Add #ifdef ENABLE_SM80_EXT_OPS / #endif around 7 tail MoE ops.

No changes to setup_ops.py — keeps #6488's code as-is.

Usage or Command

No user-facing changes. Build correctly gates ops per SM tier after this fix.

Accuracy Tests

Guard macro verified in setup_ops.py: ENABLE_SM75_EXT_OPS and ENABLE_SM80_EXT_OPS are both in cc_compile_args (host compiler visibility — required for .cc files).

Wholesale version tested on Baidu AI Studio V100 (pipeline p-1051a228d3c7).

Checklist

• 4 additive lines, 0 deletions — minimal diff
• Pre-commit hooks pass (clang-format)
• Guards use macros visible to host compiler (cc_compile_args)
• Correct SM tier: cutlass→SM75, MoE→SM80

[paddle-bot]

Thanks for your contribution!

[CLAassistant]

All committers have signed the CLA.

[r-cloudforge]

@luotao1 请问方便 review 一下吗？谢谢！

[PaddlePaddle-bot]

🤖 AI Code Review | 2026-04-14 19:46 CST

📋 Review 摘要

PR 概述：为 SM70/SM75 架构添加编译保护宏，避免链接未编译的 kernel 函数

变更范围：custom_ops/gpu_ops/cpp_extensions.cc、custom_ops/setup_ops.py

影响面 Tag：[CI] [OP]

问题

未发现阻塞性问题。

总体评价

这是一个最小化、正确的修复。PR 通过添加 #ifdef ENABLE_SM75_EXT_OPS 和 #ifdef ENABLE_SM80_EXT_OPS 保护宏，成功解决了 V100 (SM70) 和其他架构上因无条件注册未编译 kernel 导致的链接错误问题。宏定义在 setup_ops.py 中正确配置，确保了 host 和 device 编译器都能正确处理条件编译。setup_ops.py 的代码清理（删除 get_compile_parallelism() 函数）不影响功能，宏定义位置保持不变且正确。