下面一个设计包括有符号数之间直接赋值的结果。 modulesigned_assignment_synth(inputwireclk,inputwirerst,inputwiresigned[3:0]input_4bit,outputregsigned[7:0]output_8bit_wire_to_reg,outputregsigned[7:0]output_8bit_reg_to_reg);regsigned[3:0]reg_4bit;always@(posedgeclkorposedgerst)beginif(rst)b...
如上述代码,当声明的reg sign通过整数形式赋值,实际得到的是所看到的值的补码形式,如uu=-7,则uu的实际存储值为4‘b1001,即-7在4bit下的补码,即有符号数4’b1111的补码4‘b1001,然后使用补码进行运算。 `timescale 1ns/1psmoduletest;regsigned[3:0] uu;regsigned[3:0] dd;reg[2:0] extract;reg[4...
Signed VerilogIn RTL coding, when a wire or reg is declared for a signal, by default the signal is unsigned. If a signed representation of the wire or reg is needed, the Verilog keyword "signed" is used. reg signed [15:0] b; wire signed [7:0] d;...
reg9 <= (wire3[0] * ((wire4 ? $unsigned(reg10) : $unsigned($signed(reg10))) * ({(reg11 * reg9)} ? ({wire3, 1'b0} != 8'hbf) : (^$unsigned(reg8))); end end endmoduleSynthesis command:read_verilog rtl.v synth_design -part xc7k70t -top topPerform equivalence checki...
Hi. I am confusing with the signed integer and 2 complement in verilog. 1. if i declare b is [3:0] signed reg , what would be the bit representation if b is -3? 1011? or... 2. Previously we use the 2 complement to represent negative number and now the existance of signed...
,inout预设值都是wire。 若wire和reg用错地方,compiler都会提醒,所以不必太担心。一个很重要的观念,在Verilog中使用reg,并不表示合成后就是暂存器(register)。若在组合...AbstractVerilog初学者最常见的问题:『什么时候该用wire?什么时候又该用reg?』 Introduction 大体上来说,wire和reg都类似于C/C++的变数,但若...
类型转换 verilog中,任何类型的任何数值都用来给任何类型赋值.verilog使用赋值语句自动将一种类型的数值转换为另一种类型. 例如,当一个wire类型赋值给一个reg类型的变量时,wire类型的数值(包括四态数值,电平强度,多驱动解析)自动转换为reg类型(有4态数值,但没有电平强度和多驱动解析). 如果一个real类型被赋值给一...
[Verilog]如何使用signed wire ,其中值得指出的是signed标识wire变量时,wire本质上只是一些连线并无存储功能,所以当它们组合时,wire并不会产生编码逻辑(如unsigned reg连接signed wire时,并不会把原码...4bit,a和b的wire变量会先被扩位到5bit,以a为例的规则为:{a[[3]],a},即增加一位符号位,以双符号位的...
output signed [7:0] y;input signed [7:0] a;assign y=(a>>>2);若a=10101011,则输出y等于() A.00101010 B.10101100 C.11101010 D.10101111 查看答案
Verilog math operations and comparison operations (such as the less-than and greater-than operators) use the data type of the operands to determine whether to perform signed or unsigned operations. The general rule is that if all operands in the expression are signed, then a signed operation ...