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author | orivej <orivej@yandex-team.ru> | 2022-02-10 16:45:01 +0300 |
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committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:01 +0300 |
commit | 2d37894b1b037cf24231090eda8589bbb44fb6fc (patch) | |
tree | be835aa92c6248212e705f25388ebafcf84bc7a1 /contrib/libs/linux-headers/asm/swab_arm.h | |
parent | 718c552901d703c502ccbefdfc3c9028d608b947 (diff) | |
download | ydb-2d37894b1b037cf24231090eda8589bbb44fb6fc.tar.gz |
Restoring authorship annotation for <orivej@yandex-team.ru>. Commit 2 of 2.
Diffstat (limited to 'contrib/libs/linux-headers/asm/swab_arm.h')
-rw-r--r-- | contrib/libs/linux-headers/asm/swab_arm.h | 104 |
1 files changed, 52 insertions, 52 deletions
diff --git a/contrib/libs/linux-headers/asm/swab_arm.h b/contrib/libs/linux-headers/asm/swab_arm.h index cc0236dc38..8aabe5fa98 100644 --- a/contrib/libs/linux-headers/asm/swab_arm.h +++ b/contrib/libs/linux-headers/asm/swab_arm.h @@ -1,52 +1,52 @@ -/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -/* - * arch/arm/include/asm/byteorder.h - * - * ARM Endian-ness. In little endian mode, the data bus is connected such - * that byte accesses appear as: - * 0 = d0...d7, 1 = d8...d15, 2 = d16...d23, 3 = d24...d31 - * and word accesses (data or instruction) appear as: - * d0...d31 - * - * When in big endian mode, byte accesses appear as: - * 0 = d24...d31, 1 = d16...d23, 2 = d8...d15, 3 = d0...d7 - * and word accesses (data or instruction) appear as: - * d0...d31 - */ -#ifndef __ASM_ARM_SWAB_H -#define __ASM_ARM_SWAB_H - - -#include <linux/types.h> - -#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) -# define __SWAB_64_THRU_32__ -#endif - - -static __inline__ __u32 __arch_swab32(__u32 x) -{ - __u32 t; - -#ifndef __thumb__ - if (!__builtin_constant_p(x)) { - /* - * The compiler needs a bit of a hint here to always do the - * right thing and not screw it up to different degrees - * depending on the gcc version. - */ - __asm__ ("eor\t%0, %1, %1, ror #16" : "=r" (t) : "r" (x)); - } else -#endif - t = x ^ ((x << 16) | (x >> 16)); /* eor r1,r0,r0,ror #16 */ - - x = (x << 24) | (x >> 8); /* mov r0,r0,ror #8 */ - t &= ~0x00FF0000; /* bic r1,r1,#0x00FF0000 */ - x ^= (t >> 8); /* eor r0,r0,r1,lsr #8 */ - - return x; -} -#define __arch_swab32 __arch_swab32 - - -#endif /* __ASM_ARM_SWAB_H */ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * arch/arm/include/asm/byteorder.h + * + * ARM Endian-ness. In little endian mode, the data bus is connected such + * that byte accesses appear as: + * 0 = d0...d7, 1 = d8...d15, 2 = d16...d23, 3 = d24...d31 + * and word accesses (data or instruction) appear as: + * d0...d31 + * + * When in big endian mode, byte accesses appear as: + * 0 = d24...d31, 1 = d16...d23, 2 = d8...d15, 3 = d0...d7 + * and word accesses (data or instruction) appear as: + * d0...d31 + */ +#ifndef __ASM_ARM_SWAB_H +#define __ASM_ARM_SWAB_H + + +#include <linux/types.h> + +#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) +# define __SWAB_64_THRU_32__ +#endif + + +static __inline__ __u32 __arch_swab32(__u32 x) +{ + __u32 t; + +#ifndef __thumb__ + if (!__builtin_constant_p(x)) { + /* + * The compiler needs a bit of a hint here to always do the + * right thing and not screw it up to different degrees + * depending on the gcc version. + */ + __asm__ ("eor\t%0, %1, %1, ror #16" : "=r" (t) : "r" (x)); + } else +#endif + t = x ^ ((x << 16) | (x >> 16)); /* eor r1,r0,r0,ror #16 */ + + x = (x << 24) | (x >> 8); /* mov r0,r0,ror #8 */ + t &= ~0x00FF0000; /* bic r1,r1,#0x00FF0000 */ + x ^= (t >> 8); /* eor r0,r0,r1,lsr #8 */ + + return x; +} +#define __arch_swab32 __arch_swab32 + + +#endif /* __ASM_ARM_SWAB_H */ |