[Issue 807] New: inout params don't mesh with fpu

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=807

           Summary: inout params don't mesh with fpu
           Product: D
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: default_357-line at yahoo.de


http://paste.dprogramming.com/dpdd066k.php

When putting inout real parameters directly on the floating point stack, doing
stuff and popping them back, for some reason the parameter doesn't get changed.
Verified on win32/mingw-gdc0.21svn and linux/dmd1.0

Update (5 minutes later)
This is beyond odd. I've got an inout variable changing addresses.
Replace the test function in the paste with
void test(inout real r) {
  version(Tango) (new DisplayWriter(Cout))("Before: r is
"c)(cast(int)cast(void*)&r)("\n"c)();
  else writefln("Before: r is ")(cast(void*)(&r));
  asm { fld r; fsin; fstp r; }
  version(Tango) (new DisplayWriter(Cout))("After: r is
"c)(cast(int)cast(void*)&r)("\n"c)();
  else writefln("After: r is ")(cast(void*)(&r));
}
I got the following output: "Before: r is <someaddress>"  "After: r is 0"
Please enlighten me.
Greetings


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