(two-instruction sequence) mflo $s2 # move multiply result from lo register to $s2 add $s2, $s2, $s1 # $s2 += col counter sll $s2, $s2, 2 # $s2 *= 4 (shift left 2 bits) for byte offset #以上四行是算出数据应该存入的数组中的位置 sw $t2, data($s2) # 相当于data[s2]=...
subroutine return: "jump register" instruction jr $ra # "jump register" jump to return address in $ra (stored by jal instruction) Note: return address stored in registerra;ifsubroutinewillcallothersubroutines,orisrecursive,returnaddressshouldbecopiedfromra;ifsubroutinewillcallothersubroutines,orisrecursive...
the two least significant bits, $JTA_{1:0}$, should always be 0, because instructions are word aligned. The next 26 bits, $JTA_{27:2}$, are taken from the addr field of the instruction. The four most significant bits, $JTA_{31:28}$, are obtained from the four ...
将riscv架构的多条连续地址sw指令融合为一条nanomips的swm指令,从而获得一定的性能提升.当然,不做融合也总是可行的。 [0117] 举例:客处理器程序: [0118] sw rs1,offset(rs1), [0119] sw rs2,offset+4(rs1) [0120] sw rs3,offset+8(rs1) [0121] sw rs4,offset+12(rs1) [0122] sw rs5,offse...
For MIPS IV, replace the sw instruction with sd, and replace the lw instruction with ld. Define the prolog and set up the entry. 複製 .ent <routine_name> <routine_name>: Reserve space for the stack frame. 複製 Addiu sp, - An extended addiu instruction of four bytes is generated...
loads a 16-bit immediate operand into the upper 16-bits of the register specified. Maximum value of constant is 216-1 Moves a value from HI to a register. Do not use a multiply or a divide instruction within two instructions of mfhi (that action is undefined because of the MIPS ...
(addr = new_frame.pc; (addr + max_instr_check > new_frame.pc) && (!ra_offset || !stack_size); --addr) { union mips_instruction ip; if (get_mem(addr, (unsigned long *) &ip)) // 取出一条指令ip return -11; if (is_sp_move_ins(&ip)) { // 这条指令是不是addiu $sp,...
FTLB, L1-VCache, EI/DI/Wait/Prefetch instruction, DSP/DSPr2 ASE, User Local register, Read-Inhibit/Execute-Inhibit, SFB (Store Fill Buffer), Fast TLB refill support, etc. This option enable those enhancements which are not probed at run time. If you want a generic kernel t...
I am currently designing a MIPS single cycle CPU (32 bits) in Logisim I have already implemented the PC, instruction memory, register file and ALU. Since it is a 32 bits system I understand that the ... cpu processor mips logisim Luigi_S_R 1 asked Jun 13 at 5:31 1 vote 1 answ...
($t2+offset) 需要对指令字中的16位偏移进行32位带符号扩展Instruction1632RegistersWriteregisterReaddata 1Readdata 2Readregister 1Readregister 2DatamemoryWritedataReaddataWritedataSignextendALUresultZeroALUAddressMemReadMemWriteRegWriteALU operation3lwsw2003-5-15访存指令和算逻指令的数据通路综合PCInstruction...