Implementation notes: amd64, whosthere, crypto_aead/lacv1

Computer: whosthere
Microarchitecture: amd64; KabyLake (806e9)
Architecture: amd64
CPU ID: GenuineIntel-000806e9-bfebfbff
SUPERCOP version: 20221122
Operation: crypto_aead
Primitive: lacv1

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
502848	5617 16 0	22153 812 1080	`T:ref`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
1276279	10804 16 0	27725 844 1048	`T:ref`	`clang_-march=native_-O2_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20221010	20221005
1287635	8344 16 0	24701 844 1016	`T:ref`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20221010	20221005
1374525	10852 16 0	27869 844 1048	`T:ref`	`clang_-march=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20221010	20221005
1871054	4699 16 0	19273 812 1080	`T:ref`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
1882496	3931 16 0	17851 836 1016	`T:ref`	`clang_-march=native_-O_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20221010	20221005
1893563	3404 16 0	17051 836 1016	`T:ref`	`clang_-march=native_-Os_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20221010	20221005
1973638	4567 16 0	18696 804 1080	`T:ref`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
2782293	3394 16 0	16340 788 1048	`T:ref`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005

Compiler output

Implementation: T:ref
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE

encrypt.c: encrypt.c: In function 'crypto_aead_lacv1_ref_timingleaks_encrypt':
encrypt.c: encrypt.c:25:22: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
encrypt.c: 25 | xpad[xpadlen - 5] = ((xlen * 8) >> 32) & 0xff;
encrypt.c: | ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
encrypt.c: encrypt.c:425:27: note: at offset -5 to an object with size 0 allocated by 'malloc' here
encrypt.c: 425 | mpad = (unsigned char *)malloc(mpadlen); //the array to store padded message(mpad bytes)
encrypt.c: | ^~~~~~~~~~~~~~~
encrypt.c: encrypt.c:26:22: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
encrypt.c: 26 | xpad[xpadlen - 4] = ((xlen * 8) >> 24) & 0xff;
encrypt.c: | ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
encrypt.c: encrypt.c:425:27: note: at offset -4 to an object with size 0 allocated by 'malloc' here
encrypt.c: 425 | mpad = (unsigned char *)malloc(mpadlen); //the array to store padded message(mpad bytes)
encrypt.c: | ^~~~~~~~~~~~~~~
encrypt.c: encrypt.c:27:22: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
encrypt.c: 27 | xpad[xpadlen - 3] = ((xlen * 8) >> 16) & 0xff;
encrypt.c: | ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
encrypt.c: encrypt.c:425:27: note: at offset -3 to an object with size 0 allocated by 'malloc' here
encrypt.c: 425 | mpad = (unsigned char *)malloc(mpadlen); //the array to store padded message(mpad bytes)
encrypt.c: | ^~~~~~~~~~~~~~~
encrypt.c: encrypt.c:28:22: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
encrypt.c: 28 | xpad[xpadlen - 2] = ((xlen * 8) >> 8) & 0xff;
encrypt.c: | ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
encrypt.c: encrypt.c:425:27: note: at offset -2 to an object with size 0 allocated by 'malloc' here
encrypt.c: 425 | mpad = (unsigned char *)malloc(mpadlen); //the array to store padded message(mpad bytes)
encrypt.c: | ^~~~~~~~~~~~~~~
encrypt.c: ...

Number of similar (compiler,implementation) pairs: 1, namely:

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