mips

Is there an execute-store data hazard in MIPS?

由 旧街凉风 提交于 2021-01-27 15:56:45
问题 On MIPS architecture with pipelining and forwarding: add $s0, $t1, $t2 sw $s0, 0($sp) The add instruction will have the result ready at step 3 (execute operation) however I presume that the sw instruction want the result at step 2 (Instruction decode & register read). There is a solved exercise in the book Computer Organization and Design by David A. Patterson: Find the hazards in the following code segment and reorder the instructions to avoid any pipeline stalls : lw $t1, 0($t0) lw $t2, 4(

Is there an execute-store data hazard in MIPS?

由 让人想犯罪 __ 提交于 2021-01-27 15:50:19
问题 On MIPS architecture with pipelining and forwarding: add $s0, $t1, $t2 sw $s0, 0($sp) The add instruction will have the result ready at step 3 (execute operation) however I presume that the sw instruction want the result at step 2 (Instruction decode & register read). There is a solved exercise in the book Computer Organization and Design by David A. Patterson: Find the hazards in the following code segment and reorder the instructions to avoid any pipeline stalls : lw $t1, 0($t0) lw $t2, 4(

Is there an execute-store data hazard in MIPS?

由 天涯浪子 提交于 2021-01-27 14:50:23
问题 On MIPS architecture with pipelining and forwarding: add $s0, $t1, $t2 sw $s0, 0($sp) The add instruction will have the result ready at step 3 (execute operation) however I presume that the sw instruction want the result at step 2 (Instruction decode & register read). There is a solved exercise in the book Computer Organization and Design by David A. Patterson: Find the hazards in the following code segment and reorder the instructions to avoid any pipeline stalls : lw $t1, 0($t0) lw $t2, 4(

How many instructions need to be killed on a miss-predict in a 6-stage scalar or superscalar MIPS?

由 我与影子孤独终老i 提交于 2021-01-27 14:31:32
问题 I am working on a pipeline with 6 stages: F D I X0 X1 W. I am asked how many instructions need to be killed when a branch miss-predict happens. I have come up with 4. I think this because the branch resolution happens in X1 and we will need to kill all the instructions that came after the branch. In the pipeline diagram, it looks like it would require killing 4 instructions that are in the process of flowing through the pipeline. Is that correct? I am also asked how many need to be killed if

手机需要将电池用光之后再充电吗？

由 …衆ロ難τιáo~ 提交于 2021-01-22 04:41:31
手机需要将电池用光之后再充电吗？ 目前业界的电池标准技术是锂电子聚合物电池，这种电池的功率密度更高，说人话就是可以保证更高的电池使用时间，但是由于手机屏幕在更长更宽的路上没有终点，因此手机电量消耗依然很快。于是许多用户面临了这样的问题，手机是否可以随时连接电源？还是需要等待电量耗尽再充电？ 实际上，锂电子的电池寿命是根据充电周期来决定的，以iPhone的电池为例，在完成500个充电盒放电周期后，电量会下降为原始电池容量的 80%。 而一个充电周期意味着用完电池的所有电量，但并不等同于充一次电。例如，你一天可以使用iPhone好几个小时，只用了一半的电量，然后又为它充满 电。如果你第二天还如此，这只能算作一个充电周期，而不是两个，因此，你可能要花去好几天才完成一个周期。当然，每完成一个充电周期，电池容量就会减少一 点，因此，电池最终会难以维持一天的使用时间，这个时候就意味着你该更换手机电池，或直接更换手机了。 至于对于移动设备电池的保养，除了关闭一些自己不需要的联网设置，我们建议你每个月至少一次将电池充满后再将其完全用尽。同时确保自己的设备不要因为保护套过紧，而导致设备过热，影响电池寿命。 来源： oschina 链接： https://my.oschina.net/u/118890/blog/182177

Storing addresses in a register for MIPS

由 倾然丶 夕夏残阳落幕 提交于 2021-01-21 09:14:50
问题 I have allocated a certain amount of memory and would like to assign the location of this memory to variable I have declared in the .data section of the program. I know how to assign the memory location to the variable, but once I do that how can I use that variable to access the allocated memory? 回答1: MIPS has many instructions for loading and storing to memory: load word (lw), load halfword (lh), load byte(lb), store word (sw), store half word (sh), and store byte (sb) just to name a few.

Storing addresses in a register for MIPS

由 老子叫甜甜 提交于 2021-01-21 09:07:10
问题 I have allocated a certain amount of memory and would like to assign the location of this memory to variable I have declared in the .data section of the program. I know how to assign the memory location to the variable, but once I do that how can I use that variable to access the allocated memory? 回答1: MIPS has many instructions for loading and storing to memory: load word (lw), load halfword (lh), load byte(lb), store word (sw), store half word (sh), and store byte (sb) just to name a few.

MIPS assembly: how to declare integer values in the .data section?

由 旧街凉风 提交于 2021-01-17 08:20:05
问题 I'm trying to get my feet wet with MIPS assembly language using the MARS simulator. My main problem now is how do I initialize a set of memory locations so that I can access them later via assembly language instructions? For example, I want to initialize addresses 0x1001000 - 0x10001003 with the values 0x99, 0x87, 0x23, 0x45. I think this can be done in the data declaration (.data) section of my assembly program but I'm not sure of the syntax. Is this possible? Alternatively, in the .data

MIPS assembly: how to declare integer values in the .data section?

由 折月煮酒 提交于 2021-01-17 08:09:23
问题 I'm trying to get my feet wet with MIPS assembly language using the MARS simulator. My main problem now is how do I initialize a set of memory locations so that I can access them later via assembly language instructions? For example, I want to initialize addresses 0x1001000 - 0x10001003 with the values 0x99, 0x87, 0x23, 0x45. I think this can be done in the data declaration (.data) section of my assembly program but I'm not sure of the syntax. Is this possible? Alternatively, in the .data

MIPS assembly: how to declare integer values in the .data section?

由 倾然丶 夕夏残阳落幕 提交于 2021-01-17 08:06:09
问题 I'm trying to get my feet wet with MIPS assembly language using the MARS simulator. My main problem now is how do I initialize a set of memory locations so that I can access them later via assembly language instructions? For example, I want to initialize addresses 0x1001000 - 0x10001003 with the values 0x99, 0x87, 0x23, 0x45. I think this can be done in the data declaration (.data) section of my assembly program but I'm not sure of the syntax. Is this possible? Alternatively, in the .data
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