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CA-Cache-processor/src/hardware/RegisterFile.java at master · Th3Hunger/CA-Cache-processor · GitHub
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hardware
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RegisterFile.java
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CA-Cache-processor
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src
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hardware
/
RegisterFile.java
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package
hardware
;
import
java
.
util
.
Hashtable
;
import
hardware
.
MipsException
;
/**
*
* Kindly Check Read, ReadReg and Write for reading and writing from Reg File
*/
public
class
RegisterFile
{
public
static
Register
[]
registers
;
public
static
boolean
writeflag
;
public
static
Hashtable
<
String
,
String
>
reg
=
new
Hashtable
<
String
,
String
>();
public
static
String
[]
_REGNAMES_
= {
"$0"
,
"$r1"
,
"$r2"
,
"$r3"
,
"$r4"
,
"$r5"
,
"$r6"
,
"$r7"
,
"$r8"
,
"$r9"
,
"$r10"
,
"$r11"
,
"$r12"
,
"$r13"
,
"$r14"
,
"$r15"
,
"$r16"
,
"$r17"
,
"$r18"
,
"$r19"
,
"$r20"
,
"$r21"
,
"$r22"
,
"$r23"
,
"$r24"
,
"$r25"
,
"$r26"
,
"$r27"
,
"$r28"
,
"$r29"
,
"$r30"
,
"$r31"
};
public
RegisterFile
()
throws
MipsException
{
registers
=
new
Register
[
32
];
fillReg
();
for
(
int
z
=
0
;
z
<
32
;
z
++) {
registers
[
z
] =
new
Register
();
registers
[
z
].
Regname
=
_REGNAMES_
[
z
];
}
registers
[
0
].
set_Reg_Value
(
"00000000000000000000000000000000"
);
// constant value zero
}
/**
* getting reg number
*
* @param inst
* @return
*/
public
static
String
read_flag
(
String
inst
) {
return
""
+
inst
.
charAt
(
0
);
}
public
static
String
read_16_op_imm
(
String
inst
) {
String
result
=
""
;
for
(
int
i
=
1
;
i
<
inst
.
length
();
i
++) {
if
(
i
==
17
) {
break
;
}
result
+=
inst
.
charAt
(
i
);
}
return
result
;
}
public
static
int
read_rs1
(
String
inst
) {
String
result
=
""
;
for
(
int
i
=
6
;
i
<
inst
.
length
();
i
++) {
if
(
i
==
11
) {
break
;
}
result
+=
inst
.
charAt
(
i
);
}
Integer
decimal_value
=
Integer
.
parseInt
(
result
,
2
);
return
decimal_value
;
}
public
static
int
read_rt1
(
String
inst
) {
String
result
=
""
;
for
(
int
i
=
11
;
i
<
inst
.
length
();
i
++) {
if
(
i
==
16
) {
break
;
}
result
+=
inst
.
charAt
(
i
);
}
Integer
decimal_value
=
Integer
.
parseInt
(
result
,
2
);
return
decimal_value
;
}
public
static
int
read_rd1
(
String
inst
) {
String
result
=
""
;
for
(
int
i
=
16
;
i
<
inst
.
length
();
i
++) {
if
(
i
==
21
) {
break
;
}
result
+=
inst
.
charAt
(
i
);
}
Integer
decimal_value
=
Integer
.
parseInt
(
result
,
2
);
return
decimal_value
;
}
public
static
int
read_imm1
(
String
inst
)
{
String
result
=
""
;
for
(
int
i
=
16
;
i
<
inst
.
length
();
i
++) {
result
+=
inst
.
charAt
(
i
);
}
Integer
decimal_value
=
Integer
.
parseInt
(
result
,
2
);
return
decimal_value
;
}
public
static
int
read_addr1
(
String
inst
)
{
String
result
=
""
;
for
(
int
i
=
6
;
i
<
inst
.
length
();
i
++) {
result
+=
inst
.
charAt
(
i
);
}
Integer
decimal_value
=
Integer
.
parseInt
(
result
,
2
);
return
decimal_value
;
}
public
static
String
read_op
(
String
inst
) {
String
op
=
""
;
for
(
int
i
=
0
;
i
<
inst
.
length
();
i
++) {
if
(
i
==
6
) {
break
;
}
op
=
op
+
inst
.
charAt
(
i
);
}
return
op
;
}
public
static
String
read_addr_j
(
String
inst
) {
String
op
=
""
;
for
(
int
i
=
1
;
i
<
inst
.
length
();
i
++) {
if
(
i
==
27
) {
break
;
}
op
=
op
+
inst
.
charAt
(
i
);
}
return
op
;
}
public
static
String
read_imm
(
String
inst
)
{
/*
* s
*/
String
result
=
""
;
for
(
int
i
=
16
;
i
<
inst
.
length
();
i
++) {
result
+=
inst
.
charAt
(
i
);
}
return
result
;
}
public
static
String
read_funct
(
String
inst
) {
String
op
=
""
;
for
(
int
i
=
27
;
i
<
inst
.
length
();
i
++) {
op
=
op
+
inst
.
charAt
(
i
);
}
return
op
;
}
public
static
String
readrs1
(
String
inst
) {
String
result
=
""
;
for
(
int
i
=
17
;
i
<
inst
.
length
();
i
++) {
if
(
i
==
22
) {
break
;
}
result
+=
inst
.
charAt
(
i
);
}
return
result
;
}
public
static
String
readrs2
(
String
inst
) {
String
result
=
""
;
for
(
int
i
=
22
;
i
<
inst
.
length
();
i
++) {
if
(
i
==
27
) {
break
;
}
result
+=
inst
.
charAt
(
i
);
}
return
result
;
}
public
static
String
readrd
(
String
inst
) {
String
result
=
""
;
for
(
int
i
=
27
;
i
<
inst
.
length
();
i
++) {
result
+=
inst
.
charAt
(
i
);
}
return
result
;
}
private
void
fillReg
() {
reg
.
put
(
"$0"
,
"00000"
);
// 0
reg
.
put
(
"$r1"
,
"00001"
);
// 1
reg
.
put
(
"$r2"
,
"00010"
);
// 2
reg
.
put
(
"$r3"
,
"00011"
);
// 3
reg
.
put
(
"$r4"
,
"00100"
);
// 4
reg
.
put
(
"$r5"
,
"00101"
);
// 5
reg
.
put
(
"$r6"
,
"00110"
);
// 6
reg
.
put
(
"$r7"
,
"00111"
);
// 7
reg
.
put
(
"$r8"
,
"01000"
);
// 8
reg
.
put
(
"$r9"
,
"01001"
);
// 9
reg
.
put
(
"$r10"
,
"01010"
);
// 10
reg
.
put
(
"$r11"
,
"01011"
);
// 11
reg
.
put
(
"$r12"
,
"01100"
);
// 12
reg
.
put
(
"$r13"
,
"01101"
);
// 13
reg
.
put
(
"$r14"
,
"01110"
);
// 14
reg
.
put
(
"$r15"
,
"01111"
);
// 15
reg
.
put
(
"$r16"
,
"10000"
);
// 16
reg
.
put
(
"$r17"
,
"10001"
);
// 17
reg
.
put
(
"$r18"
,
"10010"
);
// 18
reg
.
put
(
"$r19"
,
"10011"
);
// 19
reg
.
put
(
"$r20"
,
"10100"
);
// 20
reg
.
put
(
"$r21"
,
"10101"
);
// 21
reg
.
put
(
"$r22"
,
"10110"
);
// 22
reg
.
put
(
"$r23"
,
"10111"
);
// 23
reg
.
put
(
"$r24"
,
"11000"
);
// 24
reg
.
put
(
"$r25"
,
"11001"
);
// 25
reg
.
put
(
"$r26"
,
"11010"
);
// 26
reg
.
put
(
"$r27"
,
"11011"
);
// 27
reg
.
put
(
"$r28"
,
"11100"
);
// 28
reg
.
put
(
"$r29"
,
"11101"
);
// 29
reg
.
put
(
"$r30"
,
"11110"
);
// 30
reg
.
put
(
"$r31"
,
"11111"
);
// 31
}
public
static
String
Regname
(
int
index
) {
return
_REGNAMES_
[
index
];
}
public
void
read
(
int
first_index
,
int
second_index
) {
System
.
out
.
println
(
registers
[
first_index
].
Regvalue
);
System
.
out
.
println
(
registers
[
second_index
].
Regvalue
);
}
/**
* read the register value
*
* @param index
* @return String
*/
public
static
String
readReg
(
String
indexx
) {
int
index
=
Integer
.
parseInt
(
indexx
,
2
);
writeflag
=
false
;
if
(!
writeflag
) {
return
registers
[
index
].
Regvalue
;
}
else
{
return
""
;
}
}
public
static
void
write
(
String
indexx
,
String
value
)
throws
MipsException
{
int
index
=
Integer
.
parseInt
(
indexx
,
2
);
if
(
index
==
0
) {
throw
new
MipsException
(
"you cant change Zero register"
);
}
writeflag
=
true
;
if
(
writeflag
) {
registers
[
index
].
set_Reg_Value
(
value
);
}
}
}
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