[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]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

---

cloudforge1 seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[fastdeploy-bot]

🤖 AI Code Review | 2026-04-11

📋 Review 摘要

PR 概述：为 T4/V100 (SM70) 添加编译保护，修复 linker error 问题

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

影响面 Tag：[CI] [OP]

📝 PR 规范检查

✅ PR 标题包含有效 Tag [CI]
✅ PR 描述填写完整（Motivation/Modifications/Usage/Accuracy Tests/Checklist）

问题

级别	文件	概述
无	-	-

未发现阻塞性问题。

总体评价

PR 正确添加了 SM75/SM80 编译保护，解决了 T4/V100 上的 linker error 问题。setup_ops.py 中的 ENABLE_SM80_EXT_OPS 宏定义位置调整合理（移到 speculate_decoding 源文件之后），确保 cc_compile_args 也包含该宏，使 cpp_extensions.cc 中的 #ifdef 保护能够正确生效。修改方式 minimal（4 行新增，0 删除），符合 PR 描述的 additive-only 策略。