R3 = R3 + X3; \
}
-void salsa_r (uint4 *T)
+void salsa_r (uint4 *TI)
{
- uint4 R0 = T[STATE_CNT4 - 4];
- uint4 R1 = T[STATE_CNT4 - 3];
- uint4 R2 = T[STATE_CNT4 - 2];
- uint4 R3 = T[STATE_CNT4 - 1];
+ uint4 R0 = TI[STATE_CNT4 - 4];
+ uint4 R1 = TI[STATE_CNT4 - 3];
+ uint4 R2 = TI[STATE_CNT4 - 2];
+ uint4 R3 = TI[STATE_CNT4 - 1];
- for (u32 i = 0; i < STATE_CNT4; i += 8)
+ uint4 TO[STATE_CNT4];
+
+ int idx_y = 0;
+ int idx_r1 = 0;
+ int idx_r2 = SCRYPT_R * 4;
+
+ for (int i = 0; i < SCRYPT_R; i++)
{
uint4 Y0;
uint4 Y1;
uint4 Y2;
uint4 Y3;
- Y0 = T[i + 0];
- Y1 = T[i + 1];
- Y2 = T[i + 2];
- Y3 = T[i + 3];
+ Y0 = TI[idx_y++];
+ Y1 = TI[idx_y++];
+ Y2 = TI[idx_y++];
+ Y3 = TI[idx_y++];
SALSA20_8_XOR ();
- T[i + 0] = R0;
- T[i + 1] = R1;
- T[i + 2] = R2;
- T[i + 3] = R3;
+ TO[idx_r1++] = R0;
+ TO[idx_r1++] = R1;
+ TO[idx_r1++] = R2;
+ TO[idx_r1++] = R3;
- Y0 = T[i + 4];
- Y1 = T[i + 5];
- Y2 = T[i + 6];
- Y3 = T[i + 7];
+ Y0 = TI[idx_y++];
+ Y1 = TI[idx_y++];
+ Y2 = TI[idx_y++];
+ Y3 = TI[idx_y++];
SALSA20_8_XOR ();
- T[i + 4] = R0;
- T[i + 5] = R1;
- T[i + 6] = R2;
- T[i + 7] = R3;
- }
-
- #define exchg(x,y) { const uint4 t = T[(x)]; T[(x)] = T[(y)]; T[(y)] = t; }
-
- #define exchg4(x,y) \
- { \
- const u32 x4 = (x) * 4; \
- const u32 y4 = (y) * 4; \
- \
- exchg (x4 + 0, y4 + 0); \
- exchg (x4 + 1, y4 + 1); \
- exchg (x4 + 2, y4 + 2); \
- exchg (x4 + 3, y4 + 3); \
+ TO[idx_r2++] = R0;
+ TO[idx_r2++] = R1;
+ TO[idx_r2++] = R2;
+ TO[idx_r2++] = R3;
}
- for (u32 i = 1; i < SCRYPT_R / 1; i++)
- {
- const u32 x = i * 1;
- const u32 y = i * 2;
-
- exchg4 (x, y);
- }
-
- for (u32 i = 1; i < SCRYPT_R / 2; i++)
+ #pragma unroll
+ for (int i = 0; i < STATE_CNT4; i++)
{
- const u32 x = i * 1;
- const u32 y = i * 2;
-
- const u32 xr1 = (SCRYPT_R * 2) - 1 - x;
- const u32 yr1 = (SCRYPT_R * 2) - 1 - y;
-
- exchg4 (xr1, yr1);
+ TI[i] = TO[i];
}
}