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#include <linux/kernel.h>
#include <linux/string.h>
static const u32 r[] = {
0xB7E15162, 0xBF715880, 0x38B4DA56, 0x324E7738,
0xBB1185EB, 0x4F7C7B57, 0xCFBFA1C8, 0xC2B3293D
};
static inline void sparkle256(u32 *state)
{
int i, j;
u32 rc, tmpx, tmpy, x0, y0;
for (i = 0; i < 6; i ++) {
state[1] ^= r[i];
state[3] ^= i;
for (j = 0; j < 8; j += 2) {
rc = r[j >> 1];
state[j] += ror32(state[j + 1], 31);
state[j + 1] ^= ror32(state[j], 24);
state[j] ^= rc;
state[j] += ror32(state[j + 1], 17);
state[j + 1] ^= ror32(state[j], 17);
state[j] ^= rc;
state[j] += state[j+1];
state[j + 1] ^= ror32(state[j], 31);
state[j] ^= rc;
state[j] += ror32(state[j + 1], 24);
state[j + 1] ^= ror32(state[j], 16);
state[j] ^= rc;
}
tmpx = x0 = state[0];
tmpy = y0 = state[1];
for (j = 2; j < 4; j += 2) {
tmpx ^= state[j];
tmpy ^= state[j + 1];
}
tmpx = ror32((tmpx ^ (tmpx << 16)), 16);
tmpy = ror32((tmpy ^ (tmpy << 16)), 16);
for (j = 2; j < 4; j += 2) {
state[j - 2] = state[j + 4] ^ state[j] ^ tmpy;
state[j + 4] = state[j];
state[j - 1] = state[j+ 4 + 1] ^ state[j + 1] ^ tmpx;
state[j + 4 + 1] = state[j + 1];
}
state[4 - 2] = state[4] ^ x0 ^ tmpy;
state[4] = x0;
state[4 - 1] = state[4 + 1] ^ y0 ^ tmpx;
state[4 + 1] = y0;
}
}
void mix_sparkle(u32 h[4], const u32 v[4])
{
u32 s[8];
memcpy(s, h, sizeof(u32) * 4);
memcpy(s + 4, v, sizeof(u32) * 4);
sparkle256(s);
memcpy(h, s, sizeof(u32) * 4);
}
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