a5: Flags ausgelesen

.gitignore

@@ -6,6 +6,7 @@ CMakeFiles
 *.cmake
 CMakeCache.txt
 Makefile
+!/src/c/a5/Makefile
 Hardwarenahe_Programmierung.cbp
 *~
 *.[oa]

src/c/a5/addsub.asm

@@ -30,14 +30,10 @@ return:
 
     pop edx;Flagregister in edx schreiben
 
-    ;FIXME: Hier wird an die falsche Stelle oder so geschrieben
-
     mov ebx, [ebp+20]
 
     mov [ebx], edx
 
-    ;mov [ebp+20], edx;Flagregister aus edx in flags ptr aus C kopieren
-    ;mov word[ebp+24], 32
 
     pop edx
     pop ecx
@@ -47,6 +43,4 @@ return:
     pop ebp
     ret
 
-section .data
-
-temp dw 0
+section .data

src/c/a5/flagtest.c

@@ -26,9 +26,12 @@ int main(int argc, char **argv) {
     int op2 = atoi(argv[3]);
     char what = *argv[2];
 
+    signed short sop1 = (short) op1;
+    signed short sop2 = (short) op2;
+    unsigned short uop1 = (unsigned short) op1;
+    unsigned short uop2 = (unsigned short) op2;
+
     unsigned int *flags = malloc(sizeof(unsigned int));
-    //TODO: DEBUG Statement, remove later
-    *flags = 42;
 
     int result = addsub(op1, op2, what, flags);
 
@@ -38,22 +41,30 @@ int main(int argc, char **argv) {
     printf("Flags:\n");
     printf("O D I T S Z   A   P   C\n");
 
+    int flagArray[12];
 
-    /*
-     * TODO: Interpretation wenn Fehler im ASM behoben
-     * https://stackoverflow.com/a/9361069
-     */
 
-    printf("%u\n\n", *flags);
-    printf("%p\n", flags);
+
+    for(int i = 0; i < 12; ++i) {
+        flagArray[i] = *flags % 2;
+        *flags = *flags / 2;
+    }
+
+    for(int i = 12; i > 0; --i) {
+        printf("%d ", flagArray[i-1]);
+    }
+
+
+
+    printf("\n\n");
 
     printf("Ergebnis und Operanden Signed:\n");
-    printf("%d %c %d = %d", op1, what, op2, signedRes);
+    printf("%d %c %d = %d", sop1, what, sop2, signedRes);
 
     printf("\n\n");
 
     printf("Ergebnis und Operanden Unsigned:\n");
-    printf("%d %c %d = %u", op1, what, op2, unsignedRes);
+    printf("%u %c %u = %u", uop1, what, uop2, unsignedRes);
 
     printf("\n\n");