Implementation notes: amd64, speed2supercop, crypto_aead/pi64cipher256v2

Computer: speed2supercop
Microarchitecture: amd64; Haswell+AES (306c3)
Architecture: amd64
CPU ID: GenuineIntel-000306c3-1fc9cbf5
SUPERCOP version: 20240625
Operation: crypto_aead
Primitive: pi64cipher256v2
TimeObject sizeTest sizeImplementationCompilerBenchmark dateSUPERCOP version
3938815006 8 029221 760 928T:goptvgcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
4090418155 8 031852 752 928T:goptvgcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
5116019654 8 035853 760 928T:goptvgcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
702847877 8 020464 736 896T:goptvgcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
885087252 8 025198 800 872T:ref3clang_-march=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
905128220 8 024638 800 856T:ref3clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
913329173 8 027134 800 872T:ref2clang_-march=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
9144410101 8 026542 800 856T:ref2clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
1127368244 8 026030 800 872T:ref2clang_-march=native_-O2_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
1253567694 8 021470 800 856T:ref3clang_-march=native_-O_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
1263246612 8 024366 800 872T:ref3clang_-march=native_-O2_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
1393807845 8 024005 760 928T:ref3gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
1399647076 8 021261 760 928T:ref3gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
1414245204 8 019799 792 920T:ref3clang_-march=native_-Os_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
1482285072 8 018748 752 928T:ref3gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
1594044470 8 016968 736 896T:ref3gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
3422726512 8 020310 800 856T:ref2clang_-march=native_-O_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
3499245896 8 019596 752 928T:ref2gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
3549924912 8 017424 736 896T:ref2gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
5170205474 8 020127 792 920T:ref2clang_-march=native_-Os_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
59929212317 8 028501 760 928T:ref2gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625
6351007312 8 021541 760 928T:ref2gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024070320240625

Test failure


error 111
crypto_aead_encrypt returns more than crypto_aead_ABYTES extra bytes

Number of similar (implementation,compiler) pairs: 18, namely:
ImplementationCompiler
T:optimized_nonSSEclang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:optimized_nonSSEclang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:optimized_nonSSEclang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:optimized_nonSSEclang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:optimized_nonSSEclang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:optimized_nonSSEgcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:optimized_nonSSEgcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:optimized_nonSSEgcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:optimized_nonSSEgcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:refclang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:refclang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:refclang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:refclang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:refclang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:refgcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:refgcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:refgcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:refgcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)

Compiler output


pi-cipher.c: pi-cipher.c:286:9: error: use of unknown builtin '__builtin_shuffle' [-Wimplicit-function-declaration]
pi-cipher.c:         n_t += __builtin_shuffle(y, g_mask);
pi-cipher.c:                ^
pi-cipher.c: pi-cipher.c:305:9: error: use of unknown builtin '__builtin_shuffle' [-Wimplicit-function-declaration]
pi-cipher.c:         m_t += __builtin_shuffle(x, g_mask);
pi-cipher.c:                ^
pi-cipher.c: pi-cipher.c:354:9: error: use of unknown builtin '__builtin_shuffle' [-Wimplicit-function-declaration]
pi-cipher.c:         m_t += __builtin_shuffle(x, g_mask);
pi-cipher.c:                ^
pi-cipher.c: 3 errors generated.

Number of similar (implementation,compiler) pairs: 5, namely:
ImplementationCompiler
T:goptvclang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:goptvclang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:goptvclang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:goptvclang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:goptvclang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))

Compiler output


pi-cipher.c: pi-cipher.c: In function 'pi64_init':
pi-cipher.c: pi-cipher.c:842:5: warning: 'pi' accessing 128 bytes in a region of size 32 [-Wstringop-overflow=]
pi-cipher.c:   842 |     pi(ctx->cis);
pi-cipher.c:       |     ^~~~~~~~~~~~
pi-cipher.c: pi-cipher.c:842:5: note: referencing argument 1 of type 'word_t[4][4]' {aka 'long unsigned int[4][4]'}
pi-cipher.c: pi-cipher.c:649:13: note: in a call to function 'pi'
pi-cipher.c:   649 | static void pi(
pi-cipher.c:       |             ^~

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:goptvgcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)

Compiler output


encrypt.c: encrypt.c:251:13: warning: unused variable 'x0' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:             ^
encrypt.c: encrypt.c:251:17: warning: unused variable 'x1' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                 ^
encrypt.c: encrypt.c:251:21: warning: unused variable 'x2' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                     ^
encrypt.c: encrypt.c:251:25: warning: unused variable 'x3' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                         ^
encrypt.c: encrypt.c:251:29: warning: unused variable 'y0' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                             ^
encrypt.c: encrypt.c:251:33: warning: unused variable 'y1' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                                 ^
encrypt.c: encrypt.c:251:37: warning: unused variable 'y2' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                                     ^
encrypt.c: encrypt.c:251:41: warning: unused variable 'y3' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                                         ^
encrypt.c: encrypt.c:251:45: warning: unused variable 'z0' [-Wunused-variable]
encrypt.c: ...

Number of similar (implementation,compiler) pairs: 5, namely:
ImplementationCompiler
T:optimized_nonSSEclang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:optimized_nonSSEclang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:optimized_nonSSEclang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:optimized_nonSSEclang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:optimized_nonSSEclang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))

Compiler output


encrypt.c: encrypt.c: In function 'crypto_aead_pi64cipher256v2_optimized_nonSSE_timingleaks_encrypt':
encrypt.c: encrypt.c:265:42: warning: unused variable 'j1' [-Wunused-variable]
encrypt.c:   265 |  unsigned long long i, j, jj, ii, b, i1, j1, a;
encrypt.c:       |                                          ^~
encrypt.c: encrypt.c:265:31: warning: unused variable 'ii' [-Wunused-variable]
encrypt.c:   265 |  unsigned long long i, j, jj, ii, b, i1, j1, a;
encrypt.c:       |                               ^~
encrypt.c: encrypt.c:261:31: warning: variable 'CommonInternalState8' set but not used [-Wunused-but-set-variable]
encrypt.c:   261 |  u_int8_t   *InternalState8, *CommonInternalState8, *tempTag8;
encrypt.c:       |                               ^~~~~~~~~~~~~~~~~~~~
encrypt.c: encrypt.c:253:51: warning: variable 'k64' set but not used [-Wunused-but-set-variable]
encrypt.c:   253 |  u_int64_t  *c64, *m64, *ad64, *nsec64, *npub64, *k64;
encrypt.c:       |                                                   ^~~
encrypt.c: encrypt.c:253:42: warning: variable 'npub64' set but not used [-Wunused-but-set-variable]
encrypt.c:   253 |  u_int64_t  *c64, *m64, *ad64, *nsec64, *npub64, *k64;
encrypt.c:       |                                          ^~~~~~
encrypt.c: encrypt.c:251:57: warning: unused variable 'z3' [-Wunused-variable]
encrypt.c:   251 |  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:       |                                                         ^~
encrypt.c: encrypt.c:251:53: warning: unused variable 'z2' [-Wunused-variable]
encrypt.c:   251 |  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:       |                                                     ^~
encrypt.c: encrypt.c:251:49: warning: unused variable 'z1' [-Wunused-variable]
encrypt.c:   251 |  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:       |                                                 ^~
encrypt.c: ...

Number of similar (implementation,compiler) pairs: 4, namely:
ImplementationCompiler
T:optimized_nonSSEgcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:optimized_nonSSEgcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:optimized_nonSSEgcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:optimized_nonSSEgcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)

Compiler output


encrypt.c: encrypt.c:134:63: warning: unused variable 't12' [-Wunused-variable]
encrypt.c:  u_int64_t  t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12, t13;
encrypt.c:                                                               ^
encrypt.c: encrypt.c:134:68: warning: unused variable 't13' [-Wunused-variable]
encrypt.c:  u_int64_t  t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12, t13;
encrypt.c:                                                                    ^
encrypt.c: encrypt.c:136:13: warning: unused variable 'x0' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:             ^
encrypt.c: encrypt.c:136:17: warning: unused variable 'x1' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                 ^
encrypt.c: encrypt.c:136:21: warning: unused variable 'x2' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                     ^
encrypt.c: encrypt.c:136:25: warning: unused variable 'x3' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                         ^
encrypt.c: encrypt.c:136:29: warning: unused variable 'y0' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                             ^
encrypt.c: encrypt.c:136:33: warning: unused variable 'y1' [-Wunused-variable]
encrypt.c:  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:                                 ^
encrypt.c: encrypt.c:136:37: warning: unused variable 'y2' [-Wunused-variable]
encrypt.c: ...

Number of similar (implementation,compiler) pairs: 5, namely:
ImplementationCompiler
T:refclang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:refclang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:refclang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:refclang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))
T:refclang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_16.0.6_(27+b1))

Compiler output


encrypt.c: encrypt.c: In function 'crypto_aead_pi64cipher256v2_ref_timingleaks_encrypt':
encrypt.c: encrypt.c:150:42: warning: unused variable 'j1' [-Wunused-variable]
encrypt.c:   150 |  unsigned long long i, j, jj, ii, b, i1, j1, a;
encrypt.c:       |                                          ^~
encrypt.c: encrypt.c:146:31: warning: variable 'CommonInternalState8' set but not used [-Wunused-but-set-variable]
encrypt.c:   146 |  u_int8_t   *InternalState8, *CommonInternalState8, *tempTag8;
encrypt.c:       |                               ^~~~~~~~~~~~~~~~~~~~
encrypt.c: encrypt.c:138:51: warning: variable 'k64' set but not used [-Wunused-but-set-variable]
encrypt.c:   138 |  u_int64_t  *c64, *m64, *ad64, *nsec64, *npub64, *k64;
encrypt.c:       |                                                   ^~~
encrypt.c: encrypt.c:138:42: warning: variable 'npub64' set but not used [-Wunused-but-set-variable]
encrypt.c:   138 |  u_int64_t  *c64, *m64, *ad64, *nsec64, *npub64, *k64;
encrypt.c:       |                                          ^~~~~~
encrypt.c: encrypt.c:136:57: warning: unused variable 'z3' [-Wunused-variable]
encrypt.c:   136 |  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:       |                                                         ^~
encrypt.c: encrypt.c:136:53: warning: unused variable 'z2' [-Wunused-variable]
encrypt.c:   136 |  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:       |                                                     ^~
encrypt.c: encrypt.c:136:49: warning: unused variable 'z1' [-Wunused-variable]
encrypt.c:   136 |  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:       |                                                 ^~
encrypt.c: encrypt.c:136:45: warning: unused variable 'z0' [-Wunused-variable]
encrypt.c:   136 |  u_int64_t  x0, x1, x2, x3, y0, y1, y2, y3, z0, z1, z2, z3;
encrypt.c:       |                                             ^~
encrypt.c: ...

Number of similar (implementation,compiler) pairs: 4, namely:
ImplementationCompiler
T:refgcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:refgcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:refgcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:refgcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)

Compiler output


pi-cipher.c: pi-cipher.c: In function 'mu':
pi-cipher.c: pi-cipher.c:226:5: warning: 'phi' reading 8 bytes from a region of size 4 [-Wstringop-overread]
pi-cipher.c:   226 |     phi(t, x, mu_const, mu_v_const, mu_rot_const);
pi-cipher.c:       |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pi-cipher.c: pi-cipher.c:226:5: note: referencing argument 4 of type 'const uint8_t[8]' {aka 'const unsigned char[8]'}
pi-cipher.c: pi-cipher.c:226:5: note: referencing argument 5 of type 'const uint8_t[4]' {aka 'const unsigned char[4]'}
pi-cipher.c: pi-cipher.c:175:13: note: in a call to function 'phi'
pi-cipher.c:   175 | static void phi(
pi-cipher.c:       |             ^~~
pi-cipher.c: pi-cipher.c: In function 'ny':
pi-cipher.c: pi-cipher.c:237:5: warning: 'phi' reading 8 bytes from a region of size 4 [-Wstringop-overread]
pi-cipher.c:   237 |     phi(dest, x, ny_const, ny_v_const, ny_rot_const);
pi-cipher.c:       |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pi-cipher.c: pi-cipher.c:237:5: note: referencing argument 4 of type 'const uint8_t[8]' {aka 'const unsigned char[8]'}
pi-cipher.c: pi-cipher.c:237:5: note: referencing argument 5 of type 'const uint8_t[4]' {aka 'const unsigned char[4]'}
pi-cipher.c: pi-cipher.c:175:13: note: in a call to function 'phi'
pi-cipher.c:   175 | static void phi(
pi-cipher.c:       |             ^~~

Number of similar (implementation,compiler) pairs: 4, namely:
ImplementationCompiler
T:ref2gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:ref2gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:ref2gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)
T:ref2gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (13.3.0)