diff options
| -rw-r--r-- | Makefile | 2 | ||||
| -rw-r--r-- | core/cortex-m/include/math.h | 24 |
2 files changed, 25 insertions, 1 deletions
@@ -43,6 +43,6 @@ all-y+=$(call objs_from_dir,board/$(BOARD),$(board-y)) all-y+=$(call objs_from_dir,common,$(common-y)) all-y+=$(call objs_from_dir,test,$($(PROJECT)-y)) dirs=core/$(CORE) chip/$(CHIP) board/$(BOARD) common test util -includes=include $(dirs) +includes=include core/$(CORE)/include $(dirs) include Makefile.rules diff --git a/core/cortex-m/include/math.h b/core/cortex-m/include/math.h new file mode 100644 index 0000000000..485f28ba23 --- /dev/null +++ b/core/cortex-m/include/math.h @@ -0,0 +1,24 @@ +/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* Math utility functions for ARMv7 */ + +#ifndef __EC_MATH_H +#define __EC_MATH_H + +#ifdef CONFIG_FPU +static inline float sqrtf(float v) +{ + float root; + asm volatile( + "fsqrts %0, %1" + : "=w" (root) + : "w" (v) + ); + return root; +} +#endif /* CONFIG_FPU */ + +#endif /* __EC_MATH_H */ |