Implementation notes: mipso32, gcc23, crypto_dh/nist521gs

Computer: gcc23
Microarchitecture: mipso32; Octeon II (cnmips64v2)
Architecture: mipso32
CPU ID: unknown CPU ID
SUPERCOP version: 20230530
Operation: crypto_dh
Primitive: nist521gs

Compiler output

Implementation: T:ref
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

dh.c: dh.c:14:9: error: '__int128' is not supported for this target
dh.c: typedef __int128 type128;
dh.c: ^
dh.c: dh.c: In function 'gsqr':
dh.c: dh.c:279:2: warning: right shift count >= width of type
dh.c: t2=4*((type128)x[1]*x[8]+(type128)x[2]*x[7]+(type128)x[3]*x[6]+(type128)x[4]*x[5])+(type128)x[0]*x[0]+2*(t1>>58);
dh.c: ^
dh.c: dh.c:281:2: warning: right shift count >= width of type
dh.c: t1=4*((type128)x[2]*x[8]+(type128)x[3]*x[7]+(type128)x[4]*x[6])+2*((type128)x[0]*x[1]+(type128)x[5]*x[5])+(t2>>58);
dh.c: ^
dh.c: dh.c:283:2: warning: right shift count >= width of type
dh.c: t2=4*((type128)x[3]*x[8]+(type128)x[4]*x[7]+(type128)x[5]*x[6])+2*(type128)x[0]*x[2]+(type128)x[1]*x[1]+(t1>>58);
dh.c: ^
dh.c: dh.c:285:2: warning: right shift count >= width of type
dh.c: t1=4*((type128)x[4]*x[8]+(type128)x[5]*x[7])+2*((type128)x[0]*x[3]+(type128)x[1]*x[2]+(type128)x[6]*x[6])+(t2>>58);
dh.c: ^
dh.c: dh.c:287:2: warning: right shift count >= width of type
dh.c: t2=4*((type128)x[5]*x[8]+(type128)x[6]*x[7])+2*((type128)x[0]*x[4]+(type128)x[1]*x[3])+(type128)x[2]*x[2]+(t1>>58);
dh.c: ^
dh.c: dh.c:289:2: warning: right shift count >= width of type
dh.c: t1=4*(type128)x[6]*x[8]+2*((type128)x[0]*x[5]+(type128)x[1]*x[4]+(type128)x[2]*x[3]+(type128)x[7]*x[7])+(t2>>58);
dh.c: ^
dh.c: dh.c:291:2: warning: right shift count >= width of type
dh.c: t2=4*(type128)x[7]*x[8]+2*((type128)x[0]*x[6]+(type128)x[1]*x[5]+(type128)x[2]*x[4])+(type128)x[3]*x[3]+(t1>>58);
dh.c: ^
dh.c: ...

Number of similar (compiler,implementation) pairs: 4, namely:

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:ref
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:ref
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:ref
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:ref