Commit 6ab55e0a authored by Chenghao Duan's avatar Chenghao Duan Committed by Huacai Chen
Browse files

LoongArch: Add larch_insn_gen_{beq,bne} helpers 



Add larch_insn_gen_beq() and larch_insn_gen_bne() helpers which will be
used in BPF trampoline implementation.

Reviewed-by: default avatarHengqi Chen <hengqi.chen@gmail.com>
Co-developed-by: default avatarGeorge Guo <guodongtai@kylinos.cn>
Signed-off-by: default avatarGeorge Guo <guodongtai@kylinos.cn>
Co-developed-by: default avatarYouling Tang <tangyouling@kylinos.cn>
Signed-off-by: default avatarYouling Tang <tangyouling@kylinos.cn>
Signed-off-by: default avatarChenghao Duan <duanchenghao@kylinos.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 2362e812

arch/loongarch/include/asm/inst.h

+2 −0
Original line number Diff line number Diff line
@@ -510,6 +510,8 @@ u32 larch_insn_gen_move(enum loongarch_gpr rd, enum loongarch_gpr rj); 
u32 larch_insn_gen_lu12iw(enum loongarch_gpr rd, int imm);

u32 larch_insn_gen_lu32id(enum loongarch_gpr rd, int imm);

u32 larch_insn_gen_lu52id(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm);

u32 larch_insn_gen_beq(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm);

u32 larch_insn_gen_bne(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm);

u32 larch_insn_gen_jirl(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm);



static inline bool signed_imm_check(long val, unsigned int bit)

arch/loongarch/kernel/inst.c

+28 −0
Original line number Diff line number Diff line
@@ -323,6 +323,34 @@ u32 larch_insn_gen_lu52id(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm) 
	return insn.word;

}



u32 larch_insn_gen_beq(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm)

{

	union loongarch_instruction insn;



	if ((imm & 3) || imm < -SZ_128K || imm >= SZ_128K) {

		pr_warn("The generated beq instruction is out of range.\n");

		return INSN_BREAK;

	}



	emit_beq(&insn, rj, rd, imm >> 2);



	return insn.word;

}



u32 larch_insn_gen_bne(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm)

{

	union loongarch_instruction insn;



	if ((imm & 3) || imm < -SZ_128K || imm >= SZ_128K) {

		pr_warn("The generated bne instruction is out of range.\n");

		return INSN_BREAK;

	}



	emit_bne(&insn, rj, rd, imm >> 2);



	return insn.word;

}



u32 larch_insn_gen_jirl(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm)

{

	union loongarch_instruction insn;