target/10077: gcc -msse2 generates movd to move dwords between xmm regs

[douze@enseeiht.fr]

>Number:         10077
>Category:       target
>Synopsis:       gcc -msse2 generates movd to move dwords between xmm regs
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Mar 14 08:16:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     douze@enseeiht.fr
>Release:        gcc 3.2.2 on x86
>Organization:
>Environment:
Linux 2.4.18
>Description:
The bug appears when I compile a function with many variables. GCC then uses xmm registers as 32-bit scalar integer registers.

When it has to move data with an xmm register involved, it generates a movd instruction, which doesn't work (movss might work better). Although there is sse2 assembly in my code, I don't think it comes from there. 

The assembler used is GNU assembler version 2.11.92.0.10 (i486-suse-linux) using BFD version 2.11.92.0.10 20011021 (SuSE)
>How-To-Repeat:
Compile the code with 

gcc -c gcc_bug.i -msse2 -O3
>Fix:
replace movd with movss in the .s file
>Release-Note:
>Audit-Trail:
>Unformatted:
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