The `libatlas3gf-base_3.8.4-3build1_amd64.deb` package in Precise does contain 3DNow! instructions:
$ objdump -d libblas.so.3gf | grep -c prefetchw 348
The `libatlas3gf- base_3. 8.4-3build1_ amd64.deb` package in Precise does contain 3DNow! instructions:
$ objdump -d libblas.so.3gf | grep -c prefetchw
348