Q34664: Call to @Mkthread Macro Results in Phase Error

Article: Q34664
Product(s): See article
Version(s): 5.10   | 5.10
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | buglist5.10 | mspl13_masm
Last Modified: 12-JAN-1989

The program below generates a phase error on the call to the @Mkthread
macro that only includes the line "mov cx, seg fproc". The similar
MASM statements do not generate a phase error.

The problem has nothing to do with the macro. The difference between
the MASM statements is moving into CX versus AX.

Microsoft has confirmed this to be a problem in Version 5.10. We are
researching this problem and will post new information as it becomes
available.

To work around this problem, change the macro line to the following:

MOV CX, WORD PTR (SEG PROG)

The following sample code demonstrates the problem:

.model large
@mkthread    macro      prog
             mov cx,seg prog
             endm

.code
mov ax, seg fproc
@mkthread fproc

fproc       proc
mov ax,seg fproc
fproc       endp
end

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