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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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b2d23158e6
Only copy the minimal definitions of instruction opcodes and formats in inst.h from arch/loongarch to tools/arch/loongarch, and also copy the definition of sign_extend64() to tools/include/linux/bitops.h to decode the following kinds of instructions: (1) stack pointer related instructions addi.d, ld.d, st.d, ldptr.d and stptr.d (2) branch and jump related instructions beq, bne, blt, bge, bltu, bgeu, beqz, bnez, bceqz, bcnez, b, bl and jirl (3) other instructions break, nop and ertn See more info about instructions in LoongArch Reference Manual: https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html Co-developed-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Jinyang He <hejinyang@loongson.cn> Co-developed-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
101 lines
3 KiB
C
101 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TOOLS_LINUX_BITOPS_H_
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#define _TOOLS_LINUX_BITOPS_H_
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#include <asm/types.h>
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#include <limits.h>
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#ifndef __WORDSIZE
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#define __WORDSIZE (__SIZEOF_LONG__ * 8)
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#endif
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#ifndef BITS_PER_LONG
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# define BITS_PER_LONG __WORDSIZE
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#endif
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#include <linux/bits.h>
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#include <linux/compiler.h>
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#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
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#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
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#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u64))
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#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u32))
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#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(char))
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extern unsigned int __sw_hweight8(unsigned int w);
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extern unsigned int __sw_hweight16(unsigned int w);
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extern unsigned int __sw_hweight32(unsigned int w);
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extern unsigned long __sw_hweight64(__u64 w);
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/*
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* Defined here because those may be needed by architecture-specific static
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* inlines.
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*/
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#define bitop(op, nr, addr) \
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op(nr, addr)
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#define __set_bit(nr, addr) bitop(___set_bit, nr, addr)
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#define __clear_bit(nr, addr) bitop(___clear_bit, nr, addr)
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#define __change_bit(nr, addr) bitop(___change_bit, nr, addr)
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#define __test_and_set_bit(nr, addr) bitop(___test_and_set_bit, nr, addr)
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#define __test_and_clear_bit(nr, addr) bitop(___test_and_clear_bit, nr, addr)
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#define __test_and_change_bit(nr, addr) bitop(___test_and_change_bit, nr, addr)
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#define test_bit(nr, addr) bitop(_test_bit, nr, addr)
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/*
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* Include this here because some architectures need generic_ffs/fls in
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* scope
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*
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* XXX: this needs to be asm/bitops.h, when we get to per arch optimizations
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*/
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#include <asm-generic/bitops.h>
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#define for_each_set_bit(bit, addr, size) \
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for ((bit) = find_first_bit((addr), (size)); \
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(bit) < (size); \
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(bit) = find_next_bit((addr), (size), (bit) + 1))
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#define for_each_clear_bit(bit, addr, size) \
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for ((bit) = find_first_zero_bit((addr), (size)); \
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(bit) < (size); \
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(bit) = find_next_zero_bit((addr), (size), (bit) + 1))
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/* same as for_each_set_bit() but use bit as value to start with */
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#define for_each_set_bit_from(bit, addr, size) \
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for ((bit) = find_next_bit((addr), (size), (bit)); \
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(bit) < (size); \
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(bit) = find_next_bit((addr), (size), (bit) + 1))
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static inline unsigned long hweight_long(unsigned long w)
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{
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return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
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}
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static inline unsigned fls_long(unsigned long l)
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{
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if (sizeof(l) == 4)
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return fls(l);
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return fls64(l);
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}
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/**
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* rol32 - rotate a 32-bit value left
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* @word: value to rotate
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* @shift: bits to roll
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*/
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static inline __u32 rol32(__u32 word, unsigned int shift)
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{
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return (word << shift) | (word >> ((-shift) & 31));
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}
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/**
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* sign_extend64 - sign extend a 64-bit value using specified bit as sign-bit
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* @value: value to sign extend
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* @index: 0 based bit index (0<=index<64) to sign bit
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*/
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static __always_inline __s64 sign_extend64(__u64 value, int index)
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{
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__u8 shift = 63 - index;
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return (__s64)(value << shift) >> shift;
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}
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#endif
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