Lines Matching +full:cycle +full:- +full:frequency

1 // ----------------------------------------------------------------------
4 //    is actually time since power-on.  This is like time() but doesn't
19 // ----------------------------------------------------------------------
59 //    https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h
61 // This should return the number of cycles since power-on.  Thread-safe.
67   // InitializeSystemInfo() sets the supposed cpu clock frequency of  in Now()
69   // CPU clock frequency (which can change in the face of CPU  in Now()
70   // frequency scaling).  Also note that when the Mac sleeps, this  in Now()
75   // this goes above x86-specific code because old versions of Emscripten  in Now()
87   // This returns a time-base, which is not always precisely a cycle-count.  in Now()
99   tbl &= -static_cast<int32_t>(tbu0 == tbu1);  in Now()
116   // the code is being compiled with a non-ancient compiler.  in Now()
119   // See // https://docs.microsoft.com/en-us/cpp/intrinsics/arm64-intrinsics  in Now()
127   // Native Client validator on x86/x86-64 allows RDTSC instructions,  in Now()
129   // rejects MRC instructions (used in the ARM-specific sequence below),  in Now()
131   // architecture-agnostic bytecode, which doesn't provide any  in Now()
132   // cycle counter access mnemonics.  in Now()
134   // Native Client does not provide any API to access cycle counter.  in Now()
143   // System timer of ARMv8 runs at a different frequency than the CPU's.  in Now()
144   // The frequency is fixed, typically in the range 1-50MHz.  It can be  in Now()
163       // The counter is set up to count every 64th cycle  in Now()
192 #elif defined(__riscv)  // RISC-V  in Now()
223   // Alpha has a cycle counter, the PCC register, but it is an unsigned 32-bit  in Now()
225   // unreliable beyond this time range.  The real-time clock is low-precision,  in Now()