Microsoft KB Archive/35882

= FIX: A5114: Operand Size Does Not Match Segment Word Size =

Article ID: 35882

Article Last Modified on 11/15/2003

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APPLIES TO


 * Microsoft Macro Assembler 5.0
 * Microsoft Macro Assembler 5.1 Standard Edition
 * Microsoft Macro Assembler 5.1a

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This article was previously published under Q35882



SYMPTOMS
The Microsoft Macro Assembler (MASM) versions 5.0, 5.1, and 5.1a may generate the warning:

A5114: Operand size does not match segment word size

when using 32-bit operands in USE16 segments. The warning is only generated on push and pop instructions using an operand with the size other than the size of the segment. For example, using DWORD push in a USE16 segment or using a WORD push in a USE32 segment. The warning is not generated for any other use of 32-bit operands.



CAUSE
The warning message may have been added to aid the programmer trying to convert code from 16-bit segments to 32-bit segments. The warning message should only occur in 32-bit segments when 16-bit push/pop operands are given, and not in the converse situation.



STATUS
Microsoft has confirmed this to be a problem in MASM versions 5.0, 5.1, 5.1a. This problem was corrected in MASM version 6.0.



Sample Code
; Assemble options needed: /W2

.386

_TEXT16 SEGMENT WORD PUBLIC USE16 'CODE' ASSUME cs:_TEXT16

start: push eax pop eax mov ax, 4C00h int 21h _TEXT16 ENDS

_TEXT32 SEGMENT WORD PUBLIC USE32 'CODE' ASSUME cs:_TEXT32 push ax   pop ax    mov ax, 4C00h int 21h _TEXT32 ENDS

END start

Additional query words: 5.00 5.10 5.10a

Keywords: kbfix KB35882

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