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add comment on use of tpidrro_el0 on macOS

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This commit is contained in:
Daan Leijen 2021-01-28 17:36:56 -08:00
parent 8d4444ef00
commit 78ce716e2d
1 changed files with 2 additions and 2 deletions
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4
include/mimalloc-internal.h
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@ -707,7 +707,7 @@ static inline void* mi_tls_slot(size_t slot) mi_attr_noexcept {
res = tcb[slot];
#elif defined(__aarch64__)
void** tcb; UNUSED(ofs);
#if defined(__APPLE__)
#if defined(__APPLE__) // issue #343
__asm__ volatile ("mrs %0, tpidrro_el0" : "=r" (tcb));
#else
__asm__ volatile ("mrs %0, tpidr_el0" : "=r" (tcb));
@ -734,7 +734,7 @@ static inline void mi_tls_slot_set(size_t slot, void* value) mi_attr_noexcept {
tcb[slot] = value;
#elif defined(__aarch64__)
void** tcb; UNUSED(ofs);
#if defined(__APPLE__)
#if defined(__APPLE__) // issue #343
__asm__ volatile ("mrs %0, tpidrro_el0" : "=r" (tcb));
#else
__asm__ volatile ("mrs %0, tpidr_el0" : "=r" (tcb));