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1765faf803
change inline assembly for fsqrt and fabs BUG=none BRANCH=None TEST=`make buildall -j` 1. Compare sqareroot(2) from calculator and from sqrtf(2.0f) by multiplying 1.0 x 10E8 for both values to convert int32_t and check the difference. 2. read timestampt before and after 'sqrtf()' and calculate execution time. Change-Id: I62694d8b084a3a74040dc298354b4fd685e77729 Signed-off-by: Kyoung Kim <kyoung.il.kim@intel.com> Reviewed-on: https://chromium-review.googlesource.com/404927 Commit-Ready: Kyoung Il Kim <kyoung.il.kim@intel.com> Tested-by: Kyoung Il Kim <kyoung.il.kim@intel.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Kyoung Il Kim <kyoung.il.kim@intel.com>
40 lines
645 B
C
40 lines
645 B
C
/* Copyright (c) 2016 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 minute-IA */
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#ifndef __CROS_EC_MATH_H
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#define __CROS_EC_MATH_H
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#ifdef CONFIG_FPU
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static inline float sqrtf(float v)
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{
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float root;
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/* root = fsqart (v); */
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asm volatile(
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"fsqrt"
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: "=t" (root)
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: "0" (v)
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);
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return root;
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}
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static inline float fabsf(float v)
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{
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float root;
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/* root = fabs (v); */
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asm volatile(
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"fabs"
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: "=t" (root)
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: "0" (v)
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);
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return root;
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}
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#endif /* CONFIG_FPU */
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#endif /* __CROS_EC_MATH_H */
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