cp from fdlibm and refine it
777c55a backend: add double version of erf
backend/src/libocl/tmpl/ocl_math_common.tmpl.cl | 114 ++++++++++++++++++++++++
backend/src/libocl/tmpl/ocl_math_common.tmpl.h | 1 +
2 files changed, 115 insertions(+)
Upstream: cgit.freedesktop.org