| Line 1... |
Line 1... |
--! @file
|
--! @file
|
--! @brief 2:1 CPU global Definitions
|
--! @brief 2:1 CPU global Definitions
|
|
|
|
--! @mainpage
|
|
--! <H1>Main document of the OpenCPU32 project</H1>\n
|
|
--! <H2>Features</H2>
|
|
|
--! Use standard library
|
--! Use standard library
|
library IEEE;
|
library IEEE;
|
use IEEE.STD_LOGIC_1164.all;
|
use IEEE.STD_LOGIC_1164.all;
|
|
|
package pkgOpenCPU32 is
|
package pkgOpenCPU32 is
|
|
|
--! Declare constants, enums, functions used by the design
|
--! Declare constants, enums, functions used by the design
|
constant nBits : integer := 32;
|
constant nBits : integer := 32;
|
|
|
|
--! Number of general registers (r0..r15)
|
|
constant numGenRegs : integer := 16;
|
|
|
type aluOps is (alu_sum, alu_sub, alu_inc, alu_dec, alu_mul, alu_or, alu_and, alu_xor, alu_not);
|
type aluOps is (alu_sum, alu_sub, alu_inc, alu_dec, alu_mul, alu_or, alu_and, alu_xor, alu_not);
|
type typeEnDis is (enable, disable);
|
type typeEnDis is (enable, disable);
|
|
type generalRegisters is (r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,r13,r14,r15);
|
|
|
|
function reg2Num (a: generalRegisters) return integer;
|
|
function Num2reg (a: integer) return generalRegisters;
|
|
|
end pkgOpenCPU32;
|
end pkgOpenCPU32;
|
|
|
--! Define functions or procedures
|
--! Define functions or procedures
|
package body pkgOpenCPU32 is
|
package body pkgOpenCPU32 is
|
|
|
|
function reg2Num (a: generalRegisters) return integer is
|
|
variable valRet : integer;
|
|
begin
|
|
case a is
|
|
when r0 => valRet := 0;
|
|
when r1 => valRet := 1;
|
|
when r2 => valRet := 2;
|
|
when r3 => valRet := 3;
|
|
when r4 => valRet := 4;
|
|
when r5 => valRet := 5;
|
|
when r6 => valRet := 6;
|
|
when r7 => valRet := 7;
|
|
when r8 => valRet := 8;
|
|
when r9 => valRet := 9;
|
|
when r10 => valRet := 10;
|
|
when r11 => valRet := 11;
|
|
when r12 => valRet := 12;
|
|
when r13 => valRet := 13;
|
|
when r14 => valRet := 14;
|
|
when r15 => valRet := 15;
|
|
end case;
|
|
return valRet;
|
|
end reg2Num;
|
|
|
|
function Num2reg (a: integer) return generalRegisters is
|
|
variable valRet : generalRegisters;
|
|
begin
|
|
case a is
|
|
when 0 => valRet := r0;
|
|
when 1 => valRet := r1;
|
|
when 2 => valRet := r2;
|
|
when 3 => valRet := r3;
|
|
when 4 => valRet := r4;
|
|
when 5 => valRet := r5;
|
|
when 6 => valRet := r6;
|
|
when 7 => valRet := r7;
|
|
when 8 => valRet := r8;
|
|
when 9 => valRet := r9;
|
|
when 10 => valRet := r10;
|
|
when 11 => valRet := r11;
|
|
when 12 => valRet := r12;
|
|
when 13 => valRet := r13;
|
|
when 14 => valRet := r14;
|
|
when 15 => valRet := r15;
|
|
end case;
|
|
return valRet;
|
|
end Num2reg;
|
|
|
end pkgOpenCPU32;
|
end pkgOpenCPU32;
|
|
|
No newline at end of file
|
No newline at end of file
|
