[Openexr-devel] illegal instruction trap in half test on AMD sempron

[Thomas Sharpless]

Building openexr for first time, using MSVC 8 under WinXP home SP2 on 2GB AMD sempron 2500+ box:
HalfTest fails with illegal instruction trap.  Disassembly listing:

    h2 += f1;
00401592  movzx       edx,word ptr [esp+0Ch] 
00401597  mov         eax,dword ptr [__imp__toFloat (405008h)] 
0040159C  movss       xmm0,dword ptr [eax+edx*4] 
004015A1  cvtps2pd    xmm0,xmm0 
004015A4  addsd       xmm0,mmword ptr address@hidden (405270h)] 
004015AC  push        ecx  
004015AD  cvtpd2ps    xmm0,xmm0 
004015B1  lea         ecx,[esp+0Eh] 
004015B5  movss       dword ptr [esp],xmm0 
004015BA  call        half::half (401400h) 
004015BF  mov         di,word ptr [eax] 
    assert (h2 == 5);

PC points to the cvtpd2ps instruction.

Is there a known fix for this?

Thanks, Tom