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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am running GMP on a Cavium Networks Octeon board, and
trying to use 64-bit mode, e.g. mabi=64. The software package was originally
complied and runs on the same hardware in 32-bit mode (mabi=n32). I have run
into the following issue with mpn/mips64/divrem_1.asm, which uses ADDU instead
of DADDU to manipulate addresses. The first example that tripped me up (though
there are others, I am sure), is the last few lines of the following snip,
which uses ADDU instead of DADDU to adjust a passed-in pointer, inadvertently
making it a 32-bit address, then tries to access memory at that address causing
a segmentation fault.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>.L176:<br>
sll $2,$4,</span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>3</span></font><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'><br>
addu $2,$2,-</span></font><font size=2
color=olive face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:olive'>8</span></font><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'><br>
dli $3,</span></font><font size=2
color=olive face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:olive'>0</span></font><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>x8000000000000000<br>
</span></font><b><font size=2 color=navy
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:navy;font-weight:bold'>and</span></font></b><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> $3,$8,$3<br>
beq $3,$0,.L177<br>
addu $14,$14,$2<br>
beq $7,$0,.L494<br>
dsll $2,$8,</span></font><font size=2
color=olive face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:olive'>1</span></font><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'><br>
sll $2,$7,</span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>3</span></font><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'><br>
addu $2,$2,$6<br>
ld $13,-</span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>8</span></font><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'>($2)</span></font><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am interested to hear if there is a simple solution to
this – how is it that the library is used on MIPS64 with this error? Do
not all MIPS64 behave the same way?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thank you,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Bob Himlin<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>ViaSat, Inc.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><a href="mailto:bob.himlin@viasat.com">bob.himlin@viasat.com</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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