issues with new factor on sparc

[Pádraig Brady]

compile warning with gcc 3.4.3 on
SunOS login 5.10 Generic_147440-19 sun4v sparc SUNW,SPARC-Enterprise-T5220
 src/factor.c: In function `factor_using_pollard_rho2':
 src/factor.c:1535: warning: right shift count >= width of type
 src/factor.c:1558: warning: right shift count >= width of type
 src/factor.c:1568: warning: right shift count >= width of type

compile failure on niagra (sparc64) with gcc 4.3.2
 src/factor.c: In function 'factor_using_pollard_rho2':
 src/factor.c:1535: warning: right shift count >= width of type
 src/factor.c:1558: warning: right shift count >= width of type
 src/factor.c:1568: warning: right shift count >= width of type
 /tmp/ccjv79Tn.s:8713: Error: Architecture mismatch on "addc".
 /tmp/ccjv79Tn.s:8713:  (Requires v9|v9a|v9b; requested architecture is 
sparclite.)
 /tmp/ccjv79Tn.s:8755: Error: Architecture mismatch on "subccc".
 /tmp/ccjv79Tn.s:8755:  (Requires v9|v9a|v9b; requested architecture is 
sparclite.)
 /tmp/ccjv79Tn.s:8756: Error: Architecture mismatch on "subc".
 /tmp/ccjv79Tn.s:8756:  (Requires v9|v9a|v9b; requested architecture is 
sparclite.)

On niagra all tests pass if I avoid the issue with
configure --enable-no-install-program=factor

cheers,
Pádraig.