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asm: Avoid ALU instructions on busy wait cycles

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kd-11 2022-09-08 18:03:26 +03:00 • committed by kd-11
commit 0d9b1654ec
1 changed files with 2 additions and 2 deletions
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4
rpcs3/util/asm.hpp
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@ -358,9 +358,9 @@ namespace utils
// Synchronization helper (cache-friendly busy waiting) // Synchronization helper (cache-friendly busy waiting)
inline void busy_wait(usz cycles = 3000) inline void busy_wait(usz cycles = 3000)
{ {
const u64 start = get_tsc(); const u64 stop = get_tsc() + cycles;
do pause(); do pause();
while (get_tsc() - start < cycles); while (get_tsc() < stop);
} }
// Align to power of 2 // Align to power of 2