Actually make non-power-of-2 alignments work

We can't use ($$-$) % (%1) since the wraparound will be wrong except
for powers of 2.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

macros/smartalign.mac

@@ -161,14 +161,14 @@ USE: smartalign
 %unimacro align 1-2+.nolist
 %imacro align 1-2+.nolist
   %ifnempty %2
-    times ($$-$) % (%1) %2
+    times ((%1) - (($-$$) % (%1))) %2
   %else
     %push
-    %assign %$pad ($$-$) % %1
+    %assign %$pad (%1) - (($-$$) % (%1))
     %if %$pad > __ALIGN_JMP_THRESHOLD__
       jmp %$end
       ; We can't re-use %$pad here as $ will have changed!
-      times ($$-$) % %1 db 90h
+      times ((%1) - (($-$$) % (%1))) nop
 %$end:
     %else
       %if __BITS__ == 16

standard.mac

@@ -66,13 +66,13 @@ __SECT__
 %endmacro
 
 %imacro align 1-2+.nolist nop
-	  times ($$-$) % (%1) %2
+	  times ((%1) - (($-$$) % (%1))) %2
 %endmacro
 %imacro alignb 1-2+.nolist
 	  %ifempty %2
-	  	resb ($$-$) % (%1)
+	  	resb ((%1) - (($-$$) % (%1)))
 	  %else
-		times ($$-$) % (%1) %2
+		times ((%1) - (($-$$) % (%1))) %2
 	  %endif
 %endmacro
 

test/align13.asm

@@ -0,0 +1,16 @@
+; Test of non-power-of-2 alignment  
+
+	bits 32
+
+	inc eax
+	inc eax
+	align 13
+	inc eax
+	inc eax
+	align 13
+	inc eax
+	inc eax
+	align 13
+	inc eax
+	inc eax
+	

test/align13s.asm

@@ -0,0 +1,17 @@
+; Test of non-power-of-2 alignment  
+%use smartalign
+	
+	bits 32
+
+	inc eax
+	inc eax
+	align 13
+	inc eax
+	inc eax
+	align 13
+	inc eax
+	inc eax
+	align 13
+	inc eax
+	inc eax
+