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| author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
|---|---|---|
| committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
| commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
| tree | 65ca85f13617aee1dce474596800950f266a456c /roms/u-boot/arch/arm/include/asm/utils.h | |
| download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip | |
Diffstat (limited to 'roms/u-boot/arch/arm/include/asm/utils.h')
| -rw-r--r-- | roms/u-boot/arch/arm/include/asm/utils.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/include/asm/utils.h b/roms/u-boot/arch/arm/include/asm/utils.h new file mode 100644 index 00000000..1b3f1a0c --- /dev/null +++ b/roms/u-boot/arch/arm/include/asm/utils.h @@ -0,0 +1,40 @@ +/* + * (C) Copyright 2010 + * Texas Instruments, <www.ti.com> + * Aneesh V <aneesh@ti.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef _UTILS_H_ +#define _UTILS_H_ + +static inline s32 log_2_n_round_up(u32 n) +{ + s32 log2n = -1; + u32 temp = n; + + while (temp) { + log2n++; + temp >>= 1; + } + + if (n & (n - 1)) + return log2n + 1; /* not power of 2 - round up */ + else + return log2n; /* power of 2 */ +} + +static inline s32 log_2_n_round_down(u32 n) +{ + s32 log2n = -1; + u32 temp = n; + + while (temp) { + log2n++; + temp >>= 1; + } + + return log2n; +} + +#endif |