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remove memory in the clobber list because rdtsp is a serializing instr.

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This commit is contained in:
Stefan Lankes 2016-05-03 17:40:41 +02:00
parent 692920ff93
commit c3e3a5ee8d
1 changed files with 2 additions and 2 deletions
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4
hermit/arch/x86/include/asm/processor.h
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@ -401,7 +401,7 @@ inline static uint64_t rdtsc(void)
{
uint32_t lo, hi;
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi) );
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi) :: "memory");
return ((uint64_t)hi << 32ULL | (uint64_t)lo);
}
@ -418,7 +418,7 @@ inline static uint64_t rdtscp(uint32_t* cpu_id)
uint32_t lo, hi;
uint32_t id;
asm volatile ("rdtscp" : "=a"(lo), "=c"(id), "=d"(hi) :: "memory");
asm volatile ("rdtscp" : "=a"(lo), "=c"(id), "=d"(hi));
if (cpu_id)
*cpu_id = id;