Drazen Urch
7bd1550195
* Checkpoint * cpu cycle ffi * Rename * mixnode feature * Bundle libcpucycles
21 lines
422 B
C
21 lines
422 B
C
// version 20230105
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// public domain
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// djb
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// adapted from supercop/cpucycles/amd64tscfreq.c
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#include "cpucycles_internal.h"
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long long ticks(void)
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{
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unsigned long long result;
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asm volatile(".byte 15;.byte 49;shlq $32,%%rdx;orq %%rdx,%%rax"
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: "=a"(result) :: "%rdx");
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return result;
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}
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long long ticks_setup(void)
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{
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if (!cpucycles_works(ticks)) return cpucycles_SKIP;
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return cpucycles_MAYBECYCLECOUNTER;
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}
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