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| author |  Tiezhu Yang <yangtiezhu@loongson.cn>
| 2024-03-11 22:23:47 +0800 |
|---|---|---|
| committer |  Huacai Chen <chenhuacai@loongson.cn>
| 2024-03-11 22:23:47 +0800 |
| commit | b2d23158e6c881326321c2351b92568be4e57030 (patch) | |
| tree | 9cae54ba8456b713451df885c5624c364702d591 /tools/include | |
| parent | objtool/LoongArch: Enable objtool to be built (diff) | |
| download | linux-b2d23158e6c881326321c2351b92568be4e57030.tar.gz linux-b2d23158e6c881326321c2351b92568be4e57030.tar.bz2 linux-b2d23158e6c881326321c2351b92568be4e57030.zip | |
objtool/LoongArch: Implement instruction decoder
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>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/linux/bitops.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/include/linux/bitops.h b/tools/include/linux/bitops.h index f18683b95ea6..7319f6ced108 100644 --- a/tools/include/linux/bitops.h +++ b/tools/include/linux/bitops.h @@ -87,4 +87,15 @@ static inline __u32 rol32(__u32 word, unsigned int shift) return (word << shift) | (word >> ((-shift) & 31)); } +/** + * sign_extend64 - sign extend a 64-bit value using specified bit as sign-bit + * @value: value to sign extend + * @index: 0 based bit index (0<=index<64) to sign bit + */ +static __always_inline __s64 sign_extend64(__u64 value, int index) +{ + __u8 shift = 63 - index; + return (__s64)(value << shift) >> shift; +} + #endif |