ARM桶形移位器.doc

计算机组成原理实验实验报告第 5次实验： 桶形移位器实验 姓名： 学号： 111220120 11级 计算机科学与技术系 03 班邮箱：时间：2012年10月18日一， 实验目的： 1、学习掌握桶形移位器的工作原理。 2、掌握桶形移位器的设计方法。二， 实验设备：1、装有Quartus II的计算机一台。 2、Altera DE2-70开发板或Altera DE2-115开发板一块。三，实验原理图：Mips 8位桶形移位器方框图：Mips 8位桶形移位器组逻辑图：ARM32 位桶形移位器方框图：ARM32位桶形移位器逻辑图：四，实验任务：1、用Verilog HDL语言或VHDL 语言来编写，实现MIPS32位CPU中的桶形移位器。并在Quartus II上实现模拟仿真。 2、用Verilog HDL语言或VHDL 语言来编写，在Altera DE2-70开发板或Altera DE2-115开发板上实现一个8位的桶形移位器（如图）。不MIPS32位CPU中的桶形移位器原理相同，使其能够正常工作。 3、用Verilog HDL语言或VHDL 语言来编写，实现ARM32位CPU中的桶形移位器。并在Quartus II上实现模拟仿真。五 实验步骤1， 做Mips8位桶形移位器：代码设计思想：Mips桶形移位器共有四种移位方式：逻辑左移，逻辑右移，算术右移，循环右移。其中，逻辑左移和逻辑右移比较简单，先进行移位，在给空位填0就行。算术右移和逻辑右移有所差别。算术右移时，先进行右移，再在高位填上符号位。如果符号位为0，则可以和逻辑右移合并在一起，如果符号位为1，则只需先移位，再在高位填1就行。输入实验代码：module shifter_111220120(in,op,out,amount);input 7:0in;input 1:0op;input 2:0amount;output reg 7:0out;always(op or in or amount)case(op)0:begincase(amount)3b000:out=in;3b001:out=in6:0,1b0;3b010:out=in5:0,2b0;3b011:out=in4:0,3b0;3b100:out=in3:0,4b0;3b101:out=in2:0,5b0;3b110:out=in1:0,6b0;3b111:out=in0,7b0;endcaseend1:begincase(amount)3b000:out=in;3b001:out=1b0,in7:1;3b010:out=2b0,in7:2;3b011:out=3b0,in7:3;3b100:out=4b0,in7:4;3b101:out=5b0,in7:5;3b110:out=6b0,in7:6;3b111:out=7b0,in7;endcaseend2:beginif(in7=0)begincase(amount)3b000:out=in;3b001:out=1b0,in7:1;3b010:out=2b0,in7:2;3b011:out=3b0,in7:3;3b100:out=4b0,in7:4;3b101:out=5b0,in7:5;3b110:out=6b0,in7:6;3b111:out=7b0,in7;endcaseendelsebegincase(amount)3b000:out=in;3b001:out=1b1,in7:1;3b010:out=2b10,in7:2;3b011:out=3b100,in7:3;3b100:out=4b1000,in7:4;3b101:out=5b10000,in7:5;3b110:out=6b100000,in7:6;3b111:out=7b1000000,in7;endcaseendend3:begincase(amount)3b000:out=in;3b001:out=in0,in7:1;3b010:out=in1:0,in7:2;3b011:out=in2:0,in7:3;3b100:out=in3:0,in7:4;3b101:out=in4:0,in7:5;3b110:out=in5:0,in7:6;3b111:out=in6:0,in7;endcaseenddefault:;endcaseendmodule建立代码文件：分析综合成功：建立仿真：导入提前配置好的引脚文件：全编译成功：之后下载在开发板上实现。2， 做Mips32位桶形移位器：代码设计思想：与八位的设计思路相同。其中，逻辑右移和逻辑左移比较简单，只需要先移位，再添加0就行。而算术右移则要求在高位添加符号位：高位为0时out=amountb0,in31:amount;高位为1时out=1b1,amount-1b0,in31:amount;代码如下：module shifter_32bits(in,op,out,amount);input 31:0in;input 1:0op;input 4:0amount;output reg 31:0out;always(op or in or amount)case(op)0:begincase(amount)5b00000:out=in;5b00001:out=in30:0,1b0;5b00010:out=in29:0,2b0;5b00011:out=in28:0,3b0;5b00100:out=in27:0,4b0;5b00101:out=in26:0,5b0;5b00110:out=in25:0,6b0;5b00111:out=in24:0,7b0;5b01000:out=in23:0,8b0;5b01001:out=in22:0,9b0;5b01010:out=in21:0,10b0;5b01011:out=in20:0,11b0;5b01100:out=in19:0,12b0;5b01101:out=in18:0,13b0;5b01110:out=in17:0,14b0;5b01111:out=in16:0,15b0;5b10000:out=in15:0,16b0;5b10001:out=in14:0,17b0;5b10010:out=in13:0,18b0;5b10011:out=in12:0,19b0;5b10100:out=in11:0,20b0;5b10101:out=in10:0,21b0;5b10110:out=in9:0,22b0;5b10111:out=in8:0,23b0;5b11000:out=in7:0,24b0;5b11001:out=in6:0,25b0;5b11010:out=in5:0,26b0;5b11011:out=in4:0,27b0;5b11100:out=in3:0,28b0;5b11101:out=in2:0,29b0;5b11110:out=in1:0,30b0;5b11111:out=in0,31b0;endcaseend1:begincase(amount)5b00000:out=in;5b00001:out=1b0,in31:1;5b00010:out=2b0,in31:2;5b00011:out=3b0,in31:3;5b00100:out=4b0,in31:4;5b00101:out=5b0,in31:5;5b00110:out=6b0,in31:6;5b00111:out=7b0,in31:7;5b01000:out=8b0,in31:8;5b01001:out=9b0,in31:9;5b01010:out=10b0,in31:10;5b01011:out=11b0,in31:11;5b01100:out=12b0,in31:12;5b01101:out=13b0,in31:13;5b01110:out=14b0,in31:14;5b01111:out=15b0,in31:15;5b10000:out=16b0,in31:16;5b10001:out=17b0,in31:17;5b10010:out=18b0,in31:18;5b10011:out=19b0,in31:19;5b10100:out=20b0,in31:20;5b10101:out=21b0,in31:21;5b10110:out=22b0,in31:22;5b10111:out=23b0,in31:23;5b11000:out=24b0,in31:24;5b11001:out=25b0,in31:25;5b11010:out=26b0,in31:26;5b11011:out=27b0,in31:27;5b11100:out=28b0,in31:28;5b11101:out=29b0,in31:29;5b11110:out=30b0,in31:30;5b11111:out=31b0,in31;endcaseend2:beginif(in31=0)begincase(amount)5b00000:out=in;5b00001:out=1b0,in31:1;5b00010:out=2b0,in31:2;5b00011:out=3b0,in31:3;5b00100:out=4b0,in31:4;5b00101:out=5b0,in31:5;5b00110:out=6b0,in31:6;5b00111:out=7b0,in31:7;5b01000:out=8b0,in31:8;5b01001:out=9b0,in31:9;5b01010:out=10b0,in31:10;5b01011:out=11b0,in31:11;5b01100:out=12b0,in31:12;5b01101:out=13b0,in31:13;5b01110:out=14b0,in31:14;5b01111:out=15b0,in31:15;5b10000:out=16b0,in31:16;5b10001:out=17b0,in31:17;5b10010:out=18b0,in31:18;5b10011:out=19b0,in31:19;5b10100:out=20b0,in31:20;5b10101:out=21b0,in31:21;5b10110:out=22b0,in31:22;5b10111:out=23b0,in31:23;5b11000:out=24b0,in31:24;5b11001:out=25b0,in31:25;5b11010:out=26b0,in31:26;5b11011:out=27b0,in31:27;5b11100:out=28b0,in31:28;5b11101:out=29b0,in31:29;5b11110:out=30b0,in31:30;5b11111:out=31b0,in31;endcaseendelsebegincase(amount)5b00000:out=in;5b00001:out=1b1,in31:1;5b00010:out=1b1,1b0,in31:2;5b00011:out=1b1,2b0,in31:3;5b00100:out=1b1,3b0,in31:4;5b00101:out=1b1,4b0,in31:5;5b00110:out=1b1,5b0,in31:6;5b00111:out=1b1,6b0,in31:7;5b01000:out=1b1,7b0,in31:8;5b01001:out=1b1,8b0,in31:9;5b01010:out=1b1,9b0,in31:10;5b01011:out=1b1,10b0,in31:11;5b01100:out=1b1,11b0,in31:12;5b01101:out=1b1,12b0,in31:13;5b01110:out=1b1,13b0,in31:14;5b01111:out=1b1,14b0,in31:15;5b10000:out=1b1,15b0,in31:16;5b10001:out=1b1,16b0,in31:17;5b10010:out=1b1,17b0,in31:18;5b10011:out=1b1,18b0,in31:19;5b10100:out=1b1,19b0,in31:20;5b10101:out=1b1,20b0,in31:21;5b10110:out=1b1,21b0,in31:22;5b10111:out=1b1,22b0,in31:23;5b11000:out=1b1,23b0,in31:24;5b11001:out=1b1,24b0,in31:25;5b11010:out=1b1,25b0,in31:26;5b11011:out=1b1,26b0,in31:27;5b11100:out=1b1,27b0,in31:28;5b11101:out=1b1,28b0,in31:29;5b11110:out=1b1,29b0,in31:30;5b11111:out=1b1,30b0,in31;endcaseendend3:begincase(amount)5b00000:out=in;5b00001:out=in0,in31:1;5b00010:out=in1:0,in31:2;5b00011:out=in2:0,in31:3;5b00100:out=in3:0,in31:4;5b00101:out=in4:0,in31:5;5b00110:out=in5:0,in31:6;5b00111:out=in6:0,in31:7;5b01000:out=in7:0,in31:8;5b01001:out=in8:0,in31:9;5b01010:out=in9:0,in31:10;5b01011:out=in10:0,in31:11;5b01100:out=in11:0,in31:12;5b01101:out=in12:0,in31:13;5b01110:out=in13:0,in31:14;5b01111:out=in14:0,in31:15;5b10000:out=in15:0,in31:16;5b10001:out=in16:0,in31:17;5b10010:out=in17:0,in31:18;5b10011:out=in18:0,in31:19;5b10100:out=in19:0,in31:20;5b10101:out=in20:0,in31:21;5b10110:out=in21:0,in31:22;5b10111:out=in22:0,in31:23;5b11000:out=in23:0,in31:24;5b11001:out=in24:0,in31:25;5b11010:out=in25:0,in31:26;5b11011:out=in26:0,in31:27;5b11100:out=in27:0,in31:28;5b11101:out=in28:0,in31:29;5b11110:out=in29:0,in31:30;5b11111:out=in30:0,in31;endcaseenddefault:;endcaseendmodule建立代码文件：分析综合成功：建立波形文件并仿真：1op为0：逻辑左移2op为1：逻辑右移3op为2：算术左移4op为3：循环右移全编译成功：3， ARM32位桶形移位器：代码设计思想：ARM32位桶形移位器在代码设计方面和mips32位的桶形移位器有些类似，只是ARM的多了进位和溢出位已经RRX带C循环右移1位操作。在代码设计的时候，还是把每种情况都分开来写，这样比较明了。输入实验代码：module ARM_shifter_32bits_111220120(in,op,out,amount,carry_flag,carry_out);input 31:0in;input 2:0op;input 4:0amount;input carry_flag;output reg carry_out;output reg 31:0out;reg c;always(op or in or amount)case(op)0:begincase(amount)5b00000:begin out=in; carry_out=0;end5b00001:begin out=in30:0,1b0; carry_out=in31;end5b00010:begin out=in29:0,2b0; carry_out=in30;end5b00011:begin out=in28:0,3b0; carry_out=in29;end5b00100:begin out=in27:0,4b0; carry_out=in28;end5b00101:begin out=in26:0,5b0; carry_out=in27;end5b00110:begin out=in25:0,6b0; carry_out=in26;end5b00111:begin out=in24:0,7b0; carry_out=in25;end5b01000:begin out=in23:0,8b0; carry_out=in24;end5b01001:begin out=in22:0,9b0; carry_out=in23;end5b01010:begin out=in21:0,10b0; carry_out=in22;end5b01011:begin out=in20:0,11b0; carry_out=in21;end5b01100:begin out=in19:0,12b0; carry_out=in20;end5b01101:begin out=in18:0,13b0; carry_out=in19;end5b01110:begin out=in17:0,14b0; carry_out=in18;end5b01111:begin out=in16:0,15b0; carry_out=in17;end5b10000:begin out=in15:0,16b0; carry_out=in16;end5b10001:begin out=in14:0,17b0; carry_out=in15;end5b10010:begin out=in13:0,18b0; carry_out=in14;end5b10011:begin out=in12:0,19b0; carry_out=in13;end5b10100:begin out=in11:0,20b0; carry_out=in12;end5b10101:begin out=in10:0,21b0; carry_out=in11;end5b10110:begin out=in9:0,22b0; carry_out=in10;end5b10111:begin out=in8:0,23b0; carry_out=in9;end5b11000:begin out=in7:0,24b0; carry_out=in8;end5b11001:begin out=in6:0,25b0; carry_out=in7;end5b11010:begin out=in5:0,26b0; carry_out=in6;end5b11011:begin out=in4:0,27b0; carry_out=in5;end5b11100:begin out=in3:0,28b0; carry_out=in4;end5b11101:begin out=in2:0,29b0; carry_out=in3;end5b11110:begin out=in1:0,30b0; carry_out=in2;end5b11111:begin out=in0,31b0; carry_out=in1;endendcaseend1:begincase(amount)5b00000:begin out=in;carry_out=0;end5b00001:begin out=1b0,in31:1; carry_out=in0;end5b00010:begin out=2b0,in31:2;carry_out=in1;end5b00011:begin out=3b0,in31:3;carry_out=in2;end5b00100:begin out=4b0,in31:4;carry_out=in3;end5b00101:begin out=5b0,in31:5;carry_out=in4;end5b00110:begin out=6b0,in31:6;carry_out=in5;end5b00111:begin out=7b0,in31:7;carry_out=in6;end5b01000:begin out=8b0,in31:8;carry_out=in7;end5b01001:begin out=9b0,in31:9;carry_out=in8;end5b01010:begin out=10b0,in31:10;carry_out=in9;end5b01011:begin out=11b0,in31:11;carry_out=in10;end5b01100:begin out=12b0,in31:12;carry_out=in11;end5b01101:begin out=13b0,in31:13;carry_out=in12;end5b01110:begin out=14b0,in31:14;carry_out=in13;end5b01111:begin out=15b0,in31:15;carry_out=in14;end5b10000:begin out=16b0,in31:16;carry_out=in15;end5b10001:begin out=17b0,in31:17;carry_out=in16;end5b10010:begin out=18b0,in31:18;carry_out=in17;end5b10011:begin out=19b0,in31:19;carry_out=in18;end5b10100:begin out=20b0,in31:20;carry_out=in19;end5b10101:begin out=21b0,in31:21;carry_out=in20;end5b10110:begin out=22b0,in31:22;carry_out=in21;end5b10111:begin out=23b0,in31:23;carry_out=in22;end5b11000:begin out=24b0,in31:24;carry_out=in23;end5b11001:begin out=25b0,in31:25;carry_out=in24;end5b11010:begin out=26b0,in31:26;carry_out=in25;end5b11011:begin out=27b0,in31:27;carry_out=in26;end5b11100:begin out=28b0,in31:28;carry_out=in27;end5b11101:begin out=29b0,in31:29;carry_out=in28;end5b11110:begin out=30b0,in31:30;carry_out=in29;end5b11111:begin out=31b0,in31;carry_out=in30;endendcaseend2:beginif(in31=0)begincase(amount)5b00000:begin out=in;carry_out=0;end5b00001:begin out=1b0,in31:1; carry_out=in0;end5b00010:begin out=2b0,in31:2;carry_out=in1;end5b00011:begin out=3b0,in31:3;carry_out=in2;end5b00100:begin out=4b0,in31:4;carry_out=in3;end5b00101:begin out=5b0,in31:5;carry_out=in4;end5b00110:begin out=6b0,in31:6;carry_out=in5;end5b00111:begin out=7b0,in31:7;carry_out=in6;end5b01000:begin out=8b0,in31:8;carry_out=in7;end5b01001:begin out=9b0,in31:9;carry_out=in8;end5b01010:begin out=10b0,in31:10;carry_out=in9;end5b01011:begin out=11b0,in31:11;carry_out=in10;end5b01100:begin out=12b0,in31:12;carry_out=in11;end5b01101:begin out=13b0,in31:13;carry_out=in12;end5b01110:begin out=14b0,in31:14;carry_out=in13;end5b01111:begin out=15b0,in31:15;carry_out=in14;end5b10000:begin out=16b0,in31:16;carry_out=in15;end5b10001:begin out=17b0,in31:17;carry_out=in16;end5b10010:begin out=18b0,in31:18;carry_out=in17;end5b10011:begin out=19b0,in31:19;carry_out=in18;end5b10100:begin out=20b0,in31:20;carry_out=in19;end5b10101:begin out=21b0,in31:21;carry_out=in20;end5b10110:begin out=22b0,in31:22;carry_out=in21;end5b10111:begin out=23b0,in31:23;carry_out=in22;end5b11000:begin out=24b0,in31:24;carry_out=in23;end5b11001:begin out=25b0,in31:25;carry_out=in24;end5b11010:begin out=26b0,in31:26;carry_out=in25;end5b11011:begin out=27b0,in31:27;carry_out=in26;end5b11100:begin out=28b0,in31:28;carry_out=in27;end5b11101:begin out=29b0,in31:29;carry_out=in28;end5b11110:begin out=30b0,in31:30;carry_out=in29;end5b11111:begin out=31b0,in31;carry_out=in30;endendcaseendelsebegincase(amount)5b00000:begin out=in;carry_out=0;end5b00001:begin out=1b1,in31:1; carry_out=in0;end5b00010:begin out=1b1,1b0,in31:2; carry_out=in1;end5b00011:begin out=1b1,2b0,in31:3; carry_out=in2;end5b00100:begin out=1b1,3b0,in31:4; carry_out=in3;end5b00101:begin out=1b1,4b0,in31:5; carry_out=in4;end5b00110:begin out=1b1,5b0,in31:6; carry_out=in5;end5b00111:begin out=1b1,6b0,in31:7; carry_out=in6;end5b01000:begin out=1b1,7b0,in31:8; carry_out=in7;end5b01001:begin out=1b1,8b0,in31:9; carry_out=in8;end5b01010:begin out=1b1,9b0,in31:10; carry_out=in9;end5b01011:begin out=1b1,10b0,in31:11; carry_out=in10;end5b01100:begin out=1b1,11b0,in31:12; carry_out=in11;end5b01101:begin out=1b1,12b0,in31:13; carry_out=in12;end5b01110:begin out=1b1,13b0,in31:14; carry_out=in13;end5b01111:begin out=1b1,14b0,in31:15; carry_out=in14;end5b10000:begin out=1b1,15b0,in31:16; carry_out=in15;end5b10001:begin out=1b1,16b0,in31:17; carry_out=in16;end5b10010:begin out=1b1,17b0,in31:18; carry_out=in17;end5b10011:begin out=1b1,18b0,in31:19; carry_out=in18;end5b10100:begin out=1b1,19b0,in31:20; carry_out=in19;end5b10101:begin out=1b1,20b0,in31:21; carry_out=in20;end5b10110:begin out=1b1,21b0,in31:22; carry_out=in21;end5b10111:begin out=1b1,22b0,in31:23; carry_out=in22;end5b11000:begin out=1b1,23b0,in31:24; carry_out=in23;end5b11001:begin out=1b1,24b0,in31:25; carry_out=in24;end5b11010:begin out=1b1,25b0,in31:26; carry_out=in25;end5b11011:begin out=1b1,26b0,in31:27; carry_out=in26;end5b11100:begin out=1b1,27b0,in31:28; carry_out=in27;end5b11101:begin out=1b1,28b0,in31:29; carry_out=in28;end5b11110:begin out=1