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Fix verilator_gantt time on Arm.

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This commit is contained in:
Wilson Snyder 2021-10-04 22:13:34 -04:00
parent 2560fc867f
commit 55da66164b
1 changed files with 6 additions and 1 deletions
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7
include/verilatedos.h
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@ -472,7 +472,12 @@ typedef unsigned long long vluint64_t; ///< 64-bit unsigned type
(val) = ((vluint64_t)lo) | (((vluint64_t)hi) << 32); \
}
#elif defined(__aarch64__)
# define VL_RDTSC(val) asm volatile("mrs %[rt],PMCCNTR_EL0" : [rt] "=r"(val));
// 1 GHz virtual system timer on SBSA level 5 compliant systems, else often 100 MHz
# define VL_RDTSC(val) \
{ \
asm volatile("isb" : : : "memory"); \
asm volatile("mrs %[rt],CNTVCT_EL0" : [rt] "=r"(val)); \
}
#else
// We just silently ignore unknown OSes, as only leads to missing statistics
# define VL_RDTSC(val) (val) = 0;