riscv/insns/aes64dsm.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29


#include "aes_common.h"

require_rv64;
require_extension('K');

uint64_t temp = AES_INVSHIFROWS_LO(RS1,RS2);

         temp = (
    ((uint64_t)AES_DEC_SBOX[(temp >>  0) & 0xFF] <<  0) |
    ((uint64_t)AES_DEC_SBOX[(temp >>  8) & 0xFF] <<  8) |
    ((uint64_t)AES_DEC_SBOX[(temp >> 16) & 0xFF] << 16) |
    ((uint64_t)AES_DEC_SBOX[(temp >> 24) & 0xFF] << 24) |
    ((uint64_t)AES_DEC_SBOX[(temp >> 32) & 0xFF] << 32) |
    ((uint64_t)AES_DEC_SBOX[(temp >> 40) & 0xFF] << 40) |
    ((uint64_t)AES_DEC_SBOX[(temp >> 48) & 0xFF] << 48) |
    ((uint64_t)AES_DEC_SBOX[(temp >> 56) & 0xFF] << 56) 
);

uint32_t col_0 = temp & 0xFFFFFFFF;
uint32_t col_1 = temp >> 32       ;

         col_0 = AES_INVMIXCOLUMN(col_0);
         col_1 = AES_INVMIXCOLUMN(col_1);

uint64_t result= ((uint64_t)col_1 << 32) | col_0;

WRITE_RD(result);