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94fb8ee096
Add an arch include folder. Implement sqrtf for Cortex-M in math.h. BUG=chrome-os-partner:7920 TEST=none Change-Id: Ib7b480b6a0bf7760f014a1f73df54673a9016cb6 Signed-off-by: Vic Yang <victoryang@chromium.org>
25 lines
459 B
C
25 lines
459 B
C
/* Copyright (c) 2012 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 ARMv7 */
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#ifndef __EC_MATH_H
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#define __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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asm volatile(
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"fsqrts %0, %1"
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: "=w" (root)
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: "w" (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 /* __EC_MATH_H */
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