libstdc++/4622: incorrect implementation of complex operator/=

[Edward E Meyer]

>Number:         4622
>Category:       libstdc++
>Synopsis:       incorrect implementation of complex operator/=
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Fri Oct 19 13:56:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Edward E Meyer
>Release:        3.0.1
>Organization:
Boeing
>Environment:
System: IRIX64 origin 6.5 01101245 IP35


	
host: mips-sgi-irix6.5
build: mips-sgi-irix6.5
target: mips-sgi-irix6.5
configured with: ../gcc-3.0.1/configure --prefix=/acct/eem2314/local
>Description:
the implementation of the operator/= function for std template complex
is wrong - the sign is reversed on the imaginary part on line 240 of
libstdc++-v3/include/bits/std_complex.h
>How-To-Repeat:
	
>Fix:
--- std_complex.h	Fri Oct 19 20:04:32 2001
+++ std_complex.h.patch	Fri Oct 19 20:05:41 2001
@@ -237,7 +237,7 @@
     {
       const _Tp __r =  _M_real * __z.real() + _M_imag * __z.imag();
       const _Tp __n = norm(__z);
-      _M_imag = (_M_real * __z.imag() - _M_imag * __z.real()) / __n;
+      _M_imag = (_M_imag * __z.real() - _M_real * __z.imag()) / __n;
       _M_real = __r / __n;
       return *this;
     }
>Release-Note:
>Audit-Trail:
>Unformatted: