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Patch Python 3.13 and newer CPUID use #18

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Merged
CyanoHao merged 1 commit into from
Jun 27, 2026
+18 −0
Merged

Patch Python 3.13 and newer CPUID use #18

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4 changes: 4 additions & 0 deletions module/prepare_source.py
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Original file line number Diff line number Diff line change
Expand Up @@ -450,6 +450,10 @@ def _python(ver: BranchProfile, paths: ProjectPaths, download_only: bool):
patch(paths.src_dir.python, paths.patch_dir / 'python/fix-mingw-build_3.12.patch')
shutil.copy(paths.patch_dir / 'python/python-config.sh', paths.src_dir.python / 'python-config.sh')

# Fix CPUID use
if v >= Version('3.13'):
patch(paths.src_dir.python, paths.patch_dir / 'python/mimalloc-cpuid-check.patch')

patch_done(paths.src_dir.python)

def _setuptools(ver: BranchProfile, paths: ProjectPaths, download_only: bool):
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14 changes: 14 additions & 0 deletions patch/python/mimalloc-cpuid-check.patch
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Original file line number Diff line number Diff line change
@@ -0,0 +1,14 @@
--- a/Objects/mimalloc/init.c 2026-06-27 03:20:13.530317083 +1000
+++ b/Objects/mimalloc/init.c 2026-06-27 03:22:47.593182651 +1000
@@ -529,8 +529,9 @@

static void mi_detect_cpu_features(void) {
// FSRM for fast rep movsb support (AMD Zen3+ (~2020) or Intel Ice Lake+ (~2017))
- int32_t cpu_info[4];
- __cpuid(cpu_info, 7);
+ int32_t cpu_info[4] = {0};
+ if (__get_cpuid_max(0, NULL) > 0)
+ __cpuid(cpu_info, 7);
_mi_cpu_has_fsrm = ((cpu_info[3] & (1 << 4)) != 0); // bit 4 of EDX : see <https://en.wikipedia.org/wiki/CPUID#EAX=7,_ECX=0:_Extended_Features>
}
#else
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