ID Number: Q26270
5.00 5.10 5.10a
MS-DOS
buglist5.00 buglist5.10 buglist5.10a fixlist6.00
Summary:
SYMPTOMS
In the Microsoft Macro Assembler (MASM) versions 5.0, 5.1, and
5.1a, some of the relational operators evaluate to the wrong value
when used with a MOV instruction.
STATUS
Microsoft has confirmed this to be a problem in MASM versions 5.0,
5.1, and 5.1a. This problem was corrected in MASM version 6.0.
More Information:
The following listing-file sections are examples of this problem. It
is important to note that FFFF=true, and 0000=false. It is also
important to note that when FFFFh is used with the GT, GE, LE, and LT
operators, it is interpreted as the largest positive number, not as
-1.
Sample Listing File
-------------------
1 .MODEL SMALL
2 .CODE
3 0000 B8 0000 MOV AX, 0FFFFH GT -1
4 0003 B8 FFFF MOV AX, 0FFFFH LE -1
5 END
*******************************************************
1 .386
2 .MODEL SMALL
3 .CODE
4 0000 66| B8 FFFF MOV AX, -1 GE 0FFFFFFFFH
5 0004 66| B8 FFFF MOV AX, 0FFFFFFFFH LE -1
6 0008 66| B8 0000 MOV AX, 0FFFFFFFFH GT -1
7 000C 66| B8 0000 MOV AX, -1 LT 0FFFFFFFFH
8 END
Additional reference words: 5.00 5.10 5.10a 6.00