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The magnetometer online calibration requires these two functions and taken from newlib. Signed-off-by: Dino Li <dino.li@ite.com.tw> BRANCH=none BUG=none TEST=fabsf(): fabsf(1.23) = 1.23 fabsf(-1.23) = 1.23 sqrtf(): sqrtf(4.56) = 2.135 sqrtf(0.123) = 0.350 sqrtf(-0.123) = an exception is triggered. Change-Id: I808ca7f1bd03c6d6c1b32861ede4ecbfeeaa3da6 Reviewed-on: https://chromium-review.googlesource.com/429730 Commit-Ready: Dino Li <Dino.Li@ite.com.tw> Tested-by: Dino Li <Dino.Li@ite.com.tw> Reviewed-by: Randall Spangler <rspangler@chromium.org>
15 lines
337 B
C
15 lines
337 B
C
/* Copyright 2017 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Math utility functions for N8 */
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#ifndef __CROS_EC_MATH_H
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#define __CROS_EC_MATH_H
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float sqrtf(float x);
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float fabsf(float x);
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#endif /* __CROS_EC_MATH_H */
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