cleanup, removing comments and dead code

Author: nikomatsakis

src/rt/arch/i386/_context.S

@@ -20,56 +20,35 @@ The registers_t variable is in (%esp)
 swap_registers:
     // save the old context
     movl 4(%esp), %eax
-    //movl %eax, 0(%eax)
     movl %ebx, 4(%eax)
-    //movl %ecx, 8(%eax)
-    //movl %edx, 12(%eax)
     movl %ebp, 16(%eax)
     movl %esi, 20(%eax)
     movl %edi, 24(%eax)
-    //movl %cs, 32(%eax)
-    //movl %ds, 34(%eax)
-    //movl %ss, 36(%eax)
-    //movl %es, 38(%eax)
-    //movl %fs, 40(%eax)
-    //movl %gs, 42(%eax)
 
-        // save the flags
-        pushf
-        popl %ecx
-        movl %ecx, 44(%eax)
+    // save the flags
+    pushf
+    popl %ecx
+    movl %ecx, 44(%eax)
 
-        // save the return address as the instruction pointer
+    // save the return address as the instruction pointer
     // and save the stack pointer of the caller
     popl %ecx
     movl %esp, 28(%eax)
-        movl %ecx, 48(%eax)
+    movl %ecx, 48(%eax)
 
     // restore the new context
     movl 4(%esp), %eax
 
     movl 4(%eax), %ebx
-    // save ecx for later...
-    //movl 12(%eax), %edx
     movl 16(%eax), %ebp
     movl 20(%eax), %esi
     movl 24(%eax), %edi
     movl 28(%eax), %esp
-    // We can't actually change this...
-    //movl 32(%eax), %cs
-    //movl 34(%eax), %ds
-    //movl 36(%eax), %ss
-    //movl 38(%eax), %es
-    //movl 40(%eax), %fs
-    //movl 42(%eax), %gs
-
-        // restore the flags
-        movl 44(%eax), %ecx
-        push %ecx
-        popf
 
-    // ok, now we can restore ecx
-    //movl 8(%eax), %ecx
+    // restore the flags
+    movl 44(%eax), %ecx
+    push %ecx
+    popf
 
     // Return!
     jmp *48(%eax)