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gh-112535: Add comment for ppc32/64 registers #112746

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Merged
merged 2 commits into from
Dec 5, 2023
Merged

gh-112535: Add comment for ppc32/64 registers #112746

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gh-112535: Add comment for ppc32/64 registers
corona10 Dec 5, 2023
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corona10 Dec 5, 2023
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2 changes: 2 additions & 0 deletions Include/object.h
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Original file line number Diff line number Diff line change
Expand Up @@ -265,6 +265,7 @@ _Py_ThreadId(void)
#if defined(__clang__) && _Py__has_builtin(__builtin_thread_pointer)
tid = (uintptr_t)__builtin_thread_pointer();
#else
// r13 is reserved for use as system thread ID by the Power 64-bit ABI.
register uintptr_t tp __asm__ ("r13");
__asm__("" : "=r" (tp));
tid = tp;
Expand All @@ -273,6 +274,7 @@ _Py_ThreadId(void)
#if defined(__clang__) && _Py__has_builtin(__builtin_thread_pointer)
tid = (uintptr_t)__builtin_thread_pointer();
#else
// r2 is reserved for use as system thread ID by the Power 32-bit ABI.
register uintptr_t tp __asm__ ("r2");
__asm__ ("" : "=r" (tp));
tid = tp;
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