1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * This file is subject to the terms and conditions of the GNU General Public 4 * License. See the file "COPYING" in the main directory of this archive 5 * for more details. 6 * 7 * Copyright (C) 2020 Loongson Technology Corporation Limited 8 */ 9 #ifndef __LOONGARCH_ASM_BITREV_H__ 10 #define __LOONGARCH_ASM_BITREV_H__ 11 12 #include <linux/swab.h> 13 __arch_bitrev32(u32 x)14static __always_inline __attribute_const__ u32 __arch_bitrev32(u32 x) 15 { 16 u32 ret; 17 18 asm("bitrev.4b %0, %1" : "=r"(ret) : "r"(__swab32(x))); 19 return ret; 20 } 21 __arch_bitrev16(u16 x)22static __always_inline __attribute_const__ u16 __arch_bitrev16(u16 x) 23 { 24 u16 ret; 25 26 asm("bitrev.4b %0, %1" : "=r"(ret) : "r"(__swab16(x))); 27 return ret; 28 } 29 __arch_bitrev8(u8 x)30static __always_inline __attribute_const__ u8 __arch_bitrev8(u8 x) 31 { 32 u8 ret; 33 34 asm("bitrev.4b %0, %1" : "=r"(ret) : "r"(x)); 35 return ret; 36 } 37 38 #endif /* __LOONGARCH_ASM_BITREV_H__ */ 39