You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
|
|
def branch_unit(cur_pc, imm, jalr_sel, branch_taken,
|
|
|
|
|
|
alu_result): # 输入值为当前pc（int），立即数，jalr信号，是否跳转信号，alu运算结果(全是int型)
|
|
|
|
|
|
pc_plus_4 = cur_pc + 4 # 输出为pc_plus_imm,pc_plus_4,branch_target,pc_sel(忘了这是啥了，需要回头再看)
|
|
|
|
|
|
pc_plus_imm = cur_pc + imm
|
|
|
|
|
|
pc_sel = jalr_sel | (branch_taken & (alu_result % 2))
|
|
|
|
|
|
if jalr_sel == 1:
|
|
|
|
|
|
branch_target = alu_result & (2**32 - 2)
|
|
|
|
|
|
else:
|
|
|
|
|
|
branch_target = cur_pc + imm * 2
|
|
|
|
|
|
return pc_plus_imm, pc_plus_4, branch_target, pc_sel
|
