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alexxnica kryndex

armed's Issues

MUL instead of ADD in example program

	Example SOURCE_FILE :
		ADDI X0, XZR, #3;
		BL fact;
		B Exit;
		fact: SUBI SP, SP, #8;
		STUR LR, [SP, #4];
		STUR X0, [SP, #0];
		SUBIS X9, X0, #1;
		B.GE L1;
		ADDI X1, XZR, #1;
		ADDI SP, SP, #8;
		BR LR;
		L1: SUBI X0, X0, #1;
		BL fact;
		LDUR X0, [SP, #0];
		LDUR LR, [SP, #4];
		ADDI SP, SP, #8;
		ADD X1, X0, X1;
		BR LR;
		Exit:;

ADD X1, X0, X1; should be MUL X1, X0, X1

Stack underflow error when running example code in alu.go

Luiss-MacBook-Pro:bin luisschubert$ ./ARMed /Users/luisschubert/dev/comparchitecture/fact_example
Executing : ADDI X0, XZR, #3
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R0       | 0              | 3         |
+----------+----------------+-----------+

Executing : BL fact
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R30      | 0              | 2         |
+----------+----------------+-----------+

Executing : SUBI SP, SP, #8
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R28      | 16384          | 16376     |
+----------+----------------+-----------+

Executing : STUR LR, [SP, #4]
Executing : STUR X0, [SP, #0]
Executing : SUBIS X9, X0, #1
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R9       | 0              | 2         |
+----------+----------------+-----------+

Executing : B.GE L1
Executing : SUBI X0, X0, #1
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R0       | 3              | 2         |
+----------+----------------+-----------+

Executing : BL fact
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R30      | 2              | 13        |
+----------+----------------+-----------+

Executing : SUBI SP, SP, #8
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R28      | 16376          | 16368     |
+----------+----------------+-----------+

Executing : STUR LR, [SP, #4]
Executing : STUR X0, [SP, #0]
Executing : SUBIS X9, X0, #1
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R9       | 2              | 1         |
+----------+----------------+-----------+

Executing : B.GE L1
Executing : SUBI X0, X0, #1
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R0       | 2              | 1         |
+----------+----------------+-----------+

Executing : BL fact
Executing : SUBI SP, SP, #8
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R28      | 16368          | 16360     |
+----------+----------------+-----------+

Executing : STUR LR, [SP, #4]
Executing : STUR X0, [SP, #0]
Executing : SUBIS X9, X0, #1
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R9       | 1              | 0         |
+----------+----------------+-----------+

Executing : B.GE L1
Executing : SUBI X0, X0, #1
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R0       | 1              | 0         |
+----------+----------------+-----------+

Executing : BL fact
Executing : SUBI SP, SP, #8
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R28      | 16360          | 16352     |
+----------+----------------+-----------+

Executing : STUR LR, [SP, #4]
Executing : STUR X0, [SP, #0]
Executing : SUBIS X9, X0, #1
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R9       | 0              | -1        |
+----------+----------------+-----------+

Executing : B.GE L1
Executing : ADDI X1, XZR, #1
+----------+----------------+-----------+
| REGISTER | PREVIOUS VALUE | NEW VALUE |
+----------+----------------+-----------+
| R1       | 0              | 1         |
+----------+----------------+-----------+

Executing : ADDI SP, SP, #8
Stack underflow error in : ADDI SP, SP, #8

ADDI X0, XZR, #3 this line is putting 3 as the argument for the fact function.
3! = 321 = 6
I don't see 6 anywhere in the registers, so there must be something wrong with the program.

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