diff options
| author | Eddie Hung <eddie@fpgeh.com> | 2019-05-21 14:21:00 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-05-21 14:21:00 -0700 |
| commit | fb09c6219b057100d2e43028ec710888c20924fd (patch) | |
| tree | 7f1de06040bf3276fb414acf68a12eac1421389d /kernel/yosys.cc | |
| parent | 283e33ba5aad3a66bd14c30e1f52361c5f4c9789 (diff) | |
| parent | c907899422884d959632ed42c6589a0720b681e4 (diff) | |
| download | yosys-fb09c6219b057100d2e43028ec710888c20924fd.tar.gz yosys-fb09c6219b057100d2e43028ec710888c20924fd.tar.bz2 yosys-fb09c6219b057100d2e43028ec710888c20924fd.zip | |
Merge remote-tracking branch 'origin/master' into xc7mux
Diffstat (limited to 'kernel/yosys.cc')
| -rw-r--r-- | kernel/yosys.cc | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/yosys.cc b/kernel/yosys.cc index 20d972150..377572fc2 100644 --- a/kernel/yosys.cc +++ b/kernel/yosys.cc @@ -151,14 +151,16 @@ void yosys_banner() int ceil_log2(int x) { +#if defined(__GNUC__) + return x > 1 ? (8*sizeof(int)) - __builtin_clz(x-1) : 0; +#else if (x <= 0) return 0; - for (int i = 0; i < 32; i++) if (((x-1) >> i) == 0) return i; - log_abort(); +#endif } std::string stringf(const char *fmt, ...) |