[SYCLomatic] Migrate __fmaf_ieee_r* to sycl::ext::intel::math::fmaf_r*#2808
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Signed-off-by: Jiang, Zhiwei <zhiwei.jiang@intel.com>
Signed-off-by: Jiang, Zhiwei <zhiwei.jiang@intel.com>
| f2 = __fmaf_ru(f0, f1, f2); | ||
| // CHECK: f2 = sycl::ext::intel::math::fmaf_rz(f0, f1, f2); | ||
| f2 = __fmaf_rz(f0, f1, f2); | ||
| // CHECK: DPCT1138:{{[0-9]+}}: The flush-to-zero behavior can only be controlled by the compiler option in SYCL. Please verify the correctness of the migrated code. |
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The API __fmaf_ieee_rd() ignores the flush to zero compiler option when handling denormalized data, while the migrated SYCL API is impacted by it. Please...
Signed-off-by: Jiang, Zhiwei <zhiwei.jiang@intel.com>
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Pull Request Overview
This PR adds support for migrating the four IEEE rounding variants of __fmaf_ieee_r* intrinsics to the corresponding sycl::ext::intel::math::fmaf_r* calls and cleans up test invocation scripts.
- Introduces mappings for
__fmaf_ieee_rd,__fmaf_ieee_rn,__fmaf_ieee_ru, and__fmaf_ieee_rzin the single-precision intrinsic rewriter. - Removes redundant output redirection (
>> %T/diff.txt) from both Windows and Linux help-option tests.
Reviewed Changes
Copilot reviewed 3 out of 10 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| clang/test/dpct/help_option_check/win/help_option_check.cpp | Simplified RUN lines by dropping >> %T/diff.txt suffix |
| clang/test/dpct/help_option_check/lin/help_option_check.cpp | Simplified RUN lines by dropping >> %T/diff.txt suffix |
| clang/lib/DPCT/RulesLang/Math/RewriterSinglePrecisionIntrinsics.cpp | Added mappings for __fmaf_ieee_r* intrinsics to new SYCL API |
Files not reviewed (7)
- clang/lib/DPCT/Diagnostics/Diagnostics.inc: Language not supported
- clang/lib/DPCT/RulesLang/APINamesMath.inc: Language not supported
- clang/lib/DPCT/SrcAPI/APINames.inc: Language not supported
- clang/test/dpct/help_option_check/lin/help_all.txt: Language not supported
- clang/test/dpct/help_option_check/win/help_all.txt: Language not supported
- clang/test/dpct/math/cuda-math-extension.cu: Language not supported
- clang/test/dpct/math/cuda-math-intrinsics.cu: Language not supported
Comments suppressed due to low confidence (1)
clang/lib/DPCT/RulesLang/Math/RewriterSinglePrecisionIntrinsics.cpp:173
- Consider adding unit or integration tests for the new
__fmaf_ieee_r*mappings to verify that each rounding mode (rd,rn,ru,rz) is correctly rewritten and that associated warnings (FTZ or unsupported rounding) behave as expected.
__fmaf_ieee_rd
Comment on lines
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| MATH_API_REWRITERS_V2( | ||
| "__fmaf_ieee_rd", | ||
| MATH_API_REWRITER_PAIR( | ||
| math::Tag::math_libdevice, | ||
| WARNING_FACTORY_ENTRY( | ||
| "__fmaf_ieee_rd", | ||
| CALL_FACTORY_ENTRY("__fmaf_ieee_rd", | ||
| CALL(MapNames::getClNamespace() + | ||
| "ext::intel::math::fmaf_rd", | ||
| ARG(0), ARG(1), ARG(2))), | ||
| Diagnostics::FTZ_BEHAVIOR, ARG("__fmaf_ieee_rd"))), | ||
| MATH_API_REWRITER_PAIR( | ||
| math::Tag::emulation, | ||
| WARNING_FACTORY_ENTRY( | ||
| "__fmaf_ieee_rd", | ||
| CALL_FACTORY_ENTRY( | ||
| "__fmaf_ieee_rd", | ||
| CALL(MapNames::getClNamespace(false, true) + "fma", | ||
| CAST_IF_NOT_SAME(makeLiteral("float"), ARG(0)), | ||
| CAST_IF_NOT_SAME(makeLiteral("float"), ARG(1)), | ||
| CAST_IF_NOT_SAME(makeLiteral("float"), ARG(2)))), | ||
| Diagnostics::ROUNDING_MODE_UNSUPPORTED))) |
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[nitpick] The four nearly identical blocks for __fmaf_ieee_r* could be refactored into a shared helper or macro to reduce duplication and simplify future additions or adjustments.
Suggested change
| MATH_API_REWRITERS_V2( | |
| "__fmaf_ieee_rd", | |
| MATH_API_REWRITER_PAIR( | |
| math::Tag::math_libdevice, | |
| WARNING_FACTORY_ENTRY( | |
| "__fmaf_ieee_rd", | |
| CALL_FACTORY_ENTRY("__fmaf_ieee_rd", | |
| CALL(MapNames::getClNamespace() + | |
| "ext::intel::math::fmaf_rd", | |
| ARG(0), ARG(1), ARG(2))), | |
| Diagnostics::FTZ_BEHAVIOR, ARG("__fmaf_ieee_rd"))), | |
| MATH_API_REWRITER_PAIR( | |
| math::Tag::emulation, | |
| WARNING_FACTORY_ENTRY( | |
| "__fmaf_ieee_rd", | |
| CALL_FACTORY_ENTRY( | |
| "__fmaf_ieee_rd", | |
| CALL(MapNames::getClNamespace(false, true) + "fma", | |
| CAST_IF_NOT_SAME(makeLiteral("float"), ARG(0)), | |
| CAST_IF_NOT_SAME(makeLiteral("float"), ARG(1)), | |
| CAST_IF_NOT_SAME(makeLiteral("float"), ARG(2)))), | |
| Diagnostics::ROUNDING_MODE_UNSUPPORTED))) | |
| DEFINE_FMAF_IEEE_REWRITER("__fmaf_ieee_rd", "fmaf_rd", Diagnostics::FTZ_BEHAVIOR) |
zhimingwang36
approved these changes
May 28, 2025
Signed-off-by: Jiang, Zhiwei <zhiwei.jiang@intel.com>
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