github.com/afumu/libc@v0.0.6/musl/src/math/x86_64/log2l.s (about)

     1  .global log2l
     2  .type log2l,@function
     3  log2l:
     4  	fld1
     5  	fldt 8(%rsp)
     6  	fyl2x
     7  	ret