Implementation notes: amd64, hydra7, crypto_hash/echo512

Computer: hydra7
Microarchitecture: amd64; Sandy Bridge+AES (206a7)
Architecture: amd64
CPU ID: GenuineIntel-000206a7-bfebfbff
SUPERCOP version: 20240625
Operation: crypto_hash
Primitive: echo512

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
70304	24870 0 0	37949 804 960	`T:ccalik/vperm`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
71261	24870 0 0	37949 804 960	`T:ccalik/aesni`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
71384	20410 0 0	32221 804 960	`T:ccalik/vperm`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
73596	20410 0 0	32221 804 960	`T:ccalik/aesni`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
73773	20741 0 0	32189 804 960	`T:ccalik/vperm`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
77376	20741 0 0	32189 804 960	`T:ccalik/aesni`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
77516	19756 0 0	30056 780 928	`T:ccalik/vperm`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
78260	19756 0 0	30056 780 928	`T:ccalik/aesni`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
84305	15673 0 0	27125 804 960	`T:ccalik/bitsliced`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
89819	17670 0 0	30749 804 960	`T:ccalik/bitsliced`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
89898	16138 0 0	27949 804 960	`T:ccalik/bitsliced`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
95233	16200 0 0	26504 780 928	`T:ccalik/bitsliced`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
111551	28522 0 0	38920 780 928	`T:sphlib`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
111995	32611 0 0	45757 804 960	`T:sphlib`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
112152	29042 0 0	40941 804 960	`T:sphlib`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
112613	29384 0 0	40933 804 960	`T:sphlib`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
112989	21252 0 1	31592 780 960	`T:generic/opt64`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
113396	20666 0 1	32509 804 992	`T:generic/opt64`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
113605	25306 0 1	38413 804 992	`T:generic/opt64`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
115302	20532 0 1	32005 804 992	`T:generic/opt64`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
119820	22658 0 16	35860 812 992	`T:generic/opt32`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
123298	18763 0 16	29207 788 960	`T:generic/opt32`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
126276	19778 0 16	31732 812 992	`T:generic/opt32`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
128447	10522 0 0	22437 804 960	`T:sphlib-small`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
129634	9734 0 0	20152 780 928	`T:sphlib-small`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
133450	10588 0 0	22141 804 960	`T:sphlib-small`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
134883	19488 0 16	31076 812 992	`T:generic/opt32`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
139741	14507 0 0	27693 804 960	`T:sphlib-small`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
165531	32626 0 16	45828 812 992	`T:powerpc/pp32cv2`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
166523	25594 0 16	36039 788 960	`T:powerpc/pp32cv2`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
170463	28818 0 16	40772 812 992	`T:powerpc/pp32cv2`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
183981	27553 0 16	39140 812 992	`T:powerpc/pp32cv2`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
232817	18098 0 16	30052 812 992	`T:powerpc/pp32cv1`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
235963	20514 0 16	33716 812 992	`T:powerpc/pp32cv1`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
247330	16775 0 16	27207 788 960	`T:powerpc/pp32cv1`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625
251097	17739 0 16	29316 812 992	`T:powerpc/pp32cv1`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240626	20240625

Compiler output

try.c: /usr/bin/ld: libcrypto_hash_echo512.a(echo64.o): relocation R_X86_64_32S against symbol `OLDCV' can not be used when making a PIE object; recompile with -fPIE
try.c: /usr/bin/ld: failed to set dynamic section sizes: bad value
try.c: collect2: error: ld returned 1 exit status

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

Implementation	Compiler
`T:aes/aes64`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:aes/aes64`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:aes/aes64`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:aes/aes64`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`

Compiler output

echo64.S: echo64.c: Assembler messages:
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,ah'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,al'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,bl'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,bh'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,al'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,ah'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,bh'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,bl'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,ah'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,al'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,bl'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,bh'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,al'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,ah'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,bl'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,bh'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,dl'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,dh'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,ch'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,cl'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,cl'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,ch'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl ebp,dh'
echo64.S: echo64.c:519: Error: no such instruction: `movzbl esi,dl'
echo64.S: ...

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

Implementation	Compiler
`T:athlon/athlon64`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:athlon/athlon64`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:athlon/athlon64`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:athlon/athlon64`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`

Compiler output

hash.c: In file included from hash.c:20:
hash.c: vperm.h:57:9: warning: multi-line comment [-Wcomment]
hash.c:    57 |         //t2 = _mm_shuffle_epi8(table[0], x);\
hash.c:       |         ^

Number of similar (implementation,compiler) pairs: 8, namely:

Implementation	Compiler
`T:ccalik/aesni`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:ccalik/aesni`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:ccalik/aesni`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:ccalik/aesni`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:ccalik/vperm`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:ccalik/vperm`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:ccalik/vperm`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:ccalik/vperm`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`

Compiler output

echo64.S: echo64.c: Assembler messages:
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,ah'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,al'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,bl'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,bh'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,al'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,ah'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,bh'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,bl'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,ah'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,al'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,bl'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,bh'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,al'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,ah'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,bl'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,bh'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,dl'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,dh'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,ch'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,cl'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,cl'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,ch'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl ebp,dh'
echo64.S: echo64.c:473: Error: no such instruction: `movzbl esi,dl'
echo64.S: ...

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

Implementation	Compiler
`T:core2/core2v64`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:core2/core2v64`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:core2/core2v64`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:core2/core2v64`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`

Compiler output

echo32.c: echo32.c: In function 'Init':
echo32.c: echo32.c:106:23: warning: unused variable 'endianess' [-Wunused-variable]
echo32.c:   106 |         unsigned char endianess;
echo32.c:       |                       ^~~~~~~~~
echo32.c: echo32.c:105:25: warning: unused variable 'j' [-Wunused-variable]
echo32.c:   105 |         unsigned int i, j;
echo32.c:       |                         ^
echo32.c: echo32.c: In function 'Compress':
echo32.c: echo32.c:338:32: warning: unused variable 'c1' [-Wunused-variable]
echo32.c:   338 |         unsigned long long c0, c1;
echo32.c:       |                                ^~
echo32.c: echo32.c:338:28: warning: unused variable 'c0' [-Wunused-variable]
echo32.c:   338 |         unsigned long long c0, c1;
echo32.c:       |                            ^~
echo32.c: echo32.c:337:22: warning: unused variable 'i' [-Wunused-variable]
echo32.c:   337 |         unsigned int i;
echo32.c:       |                      ^
echo32.c: echo32.c: In function 'Final':
echo32.c: echo32.c:438:28: warning: unused variable 'messlen_h' [-Wunused-variable]
echo32.c:   438 |         unsigned long long messlen_h = 0;
echo32.c:       |                            ^~~~~~~~~
echo32.c: echo32.c:437:28: warning: unused variable 'messlen_l' [-Wunused-variable]
echo32.c:   437 |         unsigned long long messlen_l = 0;
echo32.c:       |                            ^~~~~~~~~
echo32.c: echo32.c:436:28: warning: unused variable 'hashlen' [-Wunused-variable]
echo32.c: ...

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

Implementation	Compiler
`T:generic/opt32`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:generic/opt32`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:generic/opt32`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:generic/opt32`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`

Compiler output

echo64.c: echo64.c: In function 'Compress':
echo64.c: echo64.c:290:30: warning: unused variable 'WT5' [-Wunused-variable]
echo64.c:   290 |     WT0, WT1, WT2, WT3, WT4, WT5;
echo64.c:       |                              ^~~
echo64.c: echo64.c: In function 'Final':
echo64.c: echo64.c:432:16: warning: unused variable 'i' [-Wunused-variable]
echo64.c:   432 |   unsigned int i;
echo64.c:       |                ^
echo64.c: echo64.c: In function 'crypto_hash_echo512_generic_opt64_timingleaks':
echo64.c: echo64.c:501:29: warning: passing argument 2 of 'Hash' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
echo64.c:   501 |   if (Hash(CRYPTO_BYTES * 8,in,inlen * 8,out) == SUCCESS) return 0;
echo64.c:       |                             ^~
echo64.c: echo64.c:488:46: note: expected 'BitSequence *' {aka 'unsigned char *'} but argument is of type 'const unsigned char *'
echo64.c:   488 | HashReturn Hash(int hashbitlen, BitSequence *data, DataLength databitlen, BitSequence *hashval)
echo64.c:       |                                 ~~~~~~~~~~~~~^~~~

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

Implementation	Compiler
`T:generic/opt64`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:generic/opt64`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:generic/opt64`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:generic/opt64`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`

Compiler output

try.c: /usr/bin/ld: libcrypto_hash_echo512.a(echo32.o): relocation R_X86_64_32S against symbol `SHA3_R' can not be used when making a PIE object; recompile with -fPIE
try.c: /usr/bin/ld: failed to set dynamic section sizes: bad value
try.c: collect2: error: ld returned 1 exit status

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

Implementation	Compiler
`T:pentium/pentium4v64v1`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:pentium/pentium4v64v1`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:pentium/pentium4v64v1`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:pentium/pentium4v64v1`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`

Compiler output

try.c: /usr/bin/ld: libcrypto_hash_echo512.a(echo64.o): relocation R_X86_64_32S against symbol `SHA3_R' can not be used when making a PIE object; recompile with -fPIE
try.c: /usr/bin/ld: failed to set dynamic section sizes: bad value
try.c: collect2: error: ld returned 1 exit status

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

Implementation	Compiler
`T:pentium/pentium4v64v2`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:pentium/pentium4v64v2`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:pentium/pentium4v64v2`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:pentium/pentium4v64v2`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`

Compiler output

echo32.c: echo32.c: In function 'Init':
echo32.c: echo32.c:107:23: warning: unused variable 'endianess' [-Wunused-variable]
echo32.c:   107 |         unsigned char endianess;
echo32.c:       |                       ^~~~~~~~~
echo32.c: echo32.c:106:25: warning: unused variable 'j' [-Wunused-variable]
echo32.c:   106 |         unsigned int i, j;
echo32.c:       |                         ^
echo32.c: echo32.c: In function 'Compress':
echo32.c: echo32.c:472:32: warning: unused variable 'c1' [-Wunused-variable]
echo32.c:   472 |         unsigned long long c0, c1;
echo32.c:       |                                ^~
echo32.c: echo32.c:472:28: warning: unused variable 'c0' [-Wunused-variable]
echo32.c:   472 |         unsigned long long c0, c1;
echo32.c:       |                            ^~
echo32.c: echo32.c: In function 'Final':
echo32.c: echo32.c:601:28: warning: unused variable 'messlen_h' [-Wunused-variable]
echo32.c:   601 |         unsigned long long messlen_h = 0;
echo32.c:       |                            ^~~~~~~~~
echo32.c: echo32.c:600:28: warning: unused variable 'messlen_l' [-Wunused-variable]
echo32.c:   600 |         unsigned long long messlen_l = 0;
echo32.c:       |                            ^~~~~~~~~
echo32.c: echo32.c:599:28: warning: unused variable 'hashlen' [-Wunused-variable]
echo32.c:   599 |         unsigned short int hashlen = 0;
echo32.c:       |                            ^~~~~~~

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

Implementation	Compiler
`T:powerpc/pp32cv1`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:powerpc/pp32cv1`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:powerpc/pp32cv1`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:powerpc/pp32cv1`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`

Compiler output

echo32.c: echo32.c: In function 'Init':
echo32.c: echo32.c:107:23: warning: unused variable 'endianess' [-Wunused-variable]
echo32.c:   107 |         unsigned char endianess;
echo32.c:       |                       ^~~~~~~~~
echo32.c: echo32.c:106:25: warning: unused variable 'j' [-Wunused-variable]
echo32.c:   106 |         unsigned int i, j;
echo32.c:       |                         ^
echo32.c: echo32.c: In function 'Compress':
echo32.c: echo32.c:440:32: warning: unused variable 'c1' [-Wunused-variable]
echo32.c:   440 |         unsigned long long c0, c1;
echo32.c:       |                                ^~
echo32.c: echo32.c:440:28: warning: unused variable 'c0' [-Wunused-variable]
echo32.c:   440 |         unsigned long long c0, c1;
echo32.c:       |                            ^~
echo32.c: echo32.c: In function 'Final':
echo32.c: echo32.c:569:28: warning: unused variable 'messlen_h' [-Wunused-variable]
echo32.c:   569 |         unsigned long long messlen_h = 0;
echo32.c:       |                            ^~~~~~~~~
echo32.c: echo32.c:568:28: warning: unused variable 'messlen_l' [-Wunused-variable]
echo32.c:   568 |         unsigned long long messlen_l = 0;
echo32.c:       |                            ^~~~~~~~~
echo32.c: echo32.c:567:28: warning: unused variable 'hashlen' [-Wunused-variable]
echo32.c:   567 |         unsigned short int hashlen = 0;
echo32.c:       |                            ^~~~~~~

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

Implementation	Compiler
`T:powerpc/pp32cv2`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:powerpc/pp32cv2`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:powerpc/pp32cv2`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`
`T:powerpc/pp32cv2`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)`