3 ms·
You can also use intel syntax with inline assembly in gcc, e.g.: asm(".intel_syntax noprefix;" "xor eax, eax;" "xor edx, edx;"
by koverstreet 6y ago
You can also use intel syntax with inline assembly in gcc, e.g.:
asm(".intel_syntax noprefix;"
"xor eax, eax;"
"xor edx, edx;"
"1:;"
"mov r8, [rdi];"
"mov r9, [rsi];"
"sub ecx, 64;"
"jl 2f;"
"cmp r8, r9;"
"jnz 3f;"
"lea rdi, [rdi - 8];"
"lea rsi, [rsi - 8];"
"jmp 1b;"
"2:;"
"not ecx;"
"shr r8, 1;"
"shr r9, 1;"
"shr r8, cl;"
"shr r9, cl;"
"cmp r8, r9;"
"3:\n"
"seta al;"
"setb dl;"
"sub eax, edx;"
".att_syntax prefix;"
: "=&D" (d0), "=&S" (d1), "=&d" (d2), "=&c" (d3), "=&a" (cmp)
: "0" (l), "1" (r), "3" (nr_key_bits)
: "r8", "r9", "cc", "memory");