Implementation notes: amd64, speed2supercop, crypto_dh/ed521gs

Computer: speed2supercop
Microarchitecture: amd64; Haswell+AES (306c3)
Architecture: amd64
CPU ID: GenuineIntel-000306c3-1fc9cbf5
SUPERCOP version: 20240625
Operation: crypto_dh
Primitive: ed521gs

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
4022180	19199 0 0	41063 768 1632	`T:ref`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240704	20240625
4122580	10871 0 0	28999 760 1600	`T:ref`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240704	20240625
4160432	15042 0 0	34975 768 1632	`T:ref`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240704	20240625
4670636	23036 0 0	42142 800 1568	`T:ref`	`clang_-march=native_-O_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240704	20240625
4752364	24460 0 0	47405 800 1600	`T:ref`	`clang_-march=native_-O2_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240704	20240625
4793600	14215 0 0	33935 792 1632	`T:ref`	`clang_-march=native_-Os_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240704	20240625
4815572	25660 0 0	48813 800 1600	`T:ref`	`clang_-march=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240704	20240625
4826228	29148 0 0	50558 800 1568	`T:ref`	`clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240704	20240625
6937940	17314 0 0	36637 760 1632	`T:ref`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240704	20240625

Compiler output

dh.c: dh.c:740:27: warning: unused variable 'S' [-Wunused-variable]
dh.c:         ECp W[1+(1<<(WINDOW-1))],S[2],Q;
dh.c:                                  ^
dh.c: dh.c:741:8: warning: unused variable 'j' [-Wunused-variable]
dh.c:         int i,j,m;
dh.c:               ^
dh.c: dh.c:741:10: warning: unused variable 'm' [-Wunused-variable]
dh.c:         int i,j,m;
dh.c:                 ^
dh.c: dh.c:763:8: warning: unused variable 'x' [-Wunused-variable]
dh.c:         int i,x,w[PANES];
dh.c:               ^
dh.c: dh.c:814:8: warning: unused variable 'x' [-Wunused-variable]
dh.c:         int i,x,w[PANES];
dh.c:               ^
dh.c: dh.c:815:14: warning: unused variable 'sh' [-Wunused-variable]
dh.c:         signed char sh;
dh.c:                     ^
dh.c: dh.c:23:21: warning: unused variable 'bot52bits' [-Wunused-const-variable]
dh.c: static const type64 bot52bits = 0xfffffffffffff;
dh.c:                     ^
dh.c: 7 warnings generated.

Number of similar (implementation,compiler) pairs: 5, namely:

Implementation	Compiler
`T:ref`	`clang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))`
`T:ref`	`clang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))`
`T:ref`	`clang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))`
`T:ref`	`clang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))`
`T:ref`	`clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))`

Compiler output

dh.c: dh.c: In function 'mul':
dh.c: dh.c:741:17: warning: unused variable 'm' [-Wunused-variable]
dh.c:   741 |         int i,j,m;
dh.c:       |                 ^
dh.c: dh.c:741:15: warning: unused variable 'j' [-Wunused-variable]
dh.c:   741 |         int i,j,m;
dh.c:       |               ^
dh.c: dh.c:740:34: warning: unused variable 'S' [-Wunused-variable]
dh.c:   740 |         ECp W[1+(1<<(WINDOW-1))],S[2],Q;
dh.c:       |                                  ^
dh.c: dh.c: In function 'crypto_dh_ed521gs_ref_timingleaks_keypair':
dh.c: dh.c:763:15: warning: unused variable 'x' [-Wunused-variable]
dh.c:   763 |         int i,x,w[PANES];
dh.c:       |               ^
dh.c: dh.c: In function 'crypto_dh_ed521gs_ref_timingleaks':
dh.c: dh.c:815:21: warning: unused variable 'sh' [-Wunused-variable]
dh.c:   815 |         signed char sh;
dh.c:       |                     ^~
dh.c: dh.c:814:15: warning: unused variable 'x' [-Wunused-variable]
dh.c:   814 |         int i,x,w[PANES];
dh.c:       |               ^
dh.c: dh.c: At top level:
dh.c: dh.c:23:21: warning: 'bot52bits' defined but not used [-Wunused-const-variable=]
dh.c:    23 | static const type64 bot52bits = 0xfffffffffffff;
dh.c:       |                     ^~~~~~~~~

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

Implementation	Compiler
`T:ref`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)`
`T:ref`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)`
`T:ref`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)`
`T:ref`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)`