Fix for bug #77 (ds with negative numbers).

[rmac] / direct.c

diff --git a/direct.c b/direct.c
index 8d3d804330ad71f8080f232c0d2ef640fdd5cb39..a7368550bd82857811166b1aa6956cfe59889d71 100644 (file)
--- a/direct.c
+++ b/direct.c
@@ -929,7 +929,9 @@ int d_ds(WORD siz)
 
        // Check to see if the value being passed in is negative (who the hell does
        // that?--nobody does; it's the code gremlins, or rum, that does it)
-       if (eval < 0)
+       // N.B.: Since VALUE is of type uint32_t, if it goes negative, it will have
+       //       its high bit set.
+       if (eval & 0x80000000)
                return error("negative sizes not allowed");
 
        // In non-TDB section (BSS, ABS and M6502) just advance the location