nds32: add software floating point library routines
We need to add a few library routines for sensor task.
Routines added are taken from nds32's library.
BRANCH=none
BUG=none
TEST=Add sensor task to reef_it8320 board.
Test screen rotation functionality on reef_it8320.
Change-Id: I2eee33f897b38e05bddd30b16f875944259b2c0d
Signed-off-by: Dino Li <Dino.Li@ite.com.tw>
Reviewed-on: https://chromium-review.googlesource.com/527537
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
2 files changed
