[SPCA] more assembly

semester3/spca/code-examples/01_asm/04_factorial.s

@@ -0,0 +1,8 @@
+factorial:
+    movl  $1, %eax      # Setup
+.AGAIN:
+    imull %edi, %eax    # %eax *= %edi
+    subl  $1, %edi      # %edi--
+    cmpl  $1, %edi      # 1 < %edi ?
+    jg    .AGAIN        # go back, if yes
+    ret

semester3/spca/code-examples/01_asm/05_factorial.s

@@ -0,0 +1,9 @@
+factorial:
+    jmp .COMP           # Check condition
+.LOOP: 
+    imull %edx, %eax    # %eax *= %edx
+    decl %edx           # %edx--
+.COMP:
+    cmpl $1, %edx       # 1 < %edx ?
+    jg .LOOP            # if yes, go to loop
+    ret