Q62183: C2404 Error with /qc Compile Option and fidiv Instruction

Article: Q62183
Product(s): See article
Version(s): 6.00   | 6.00
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | s_quickc s_quickasm buglist6.00 | mspl13_c
Last Modified: 29-MAY-1990

When the following program is compiled with the quick compiler option
(/qc), with C version 6.00 or with QuickC versions 2.50 and 2.51, the
compiler will return error C2404.

Sample Code
-----------

1. void main (void)
2. {
3.    int foo = 3 ;
4.
5.    _asm fidiv   foo
6. }

The compiler responds with the following error:

   fpburgr.c(5) : error C2404: 'ST' : illegal register in 'operand 3'

Currently, the only workaround is to not use the /qc option with C
6.00. There is no known workaround for QuickC.

Microsoft has confirmed this to be a problem with C version 6.00 and
QuickC versions 2.50 and 2.51. We are researching this problem and
will post new information here as it becomes available.

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