[PATCH] Staging: Skein: Moved macros from skein_block.c to header

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Staging: Skein: Moved macros from skein_block.c to header
 file.

The original code defined macros in the source code, making it
harder to read. Moved them to the header file, as per the TODO file.

Signed-off-by: Sanidhya Solanki <jpage.lkml@xxxxxxxxx>
---
 drivers/staging/skein/skein_block.c | 473 +-----------------------------------
 drivers/staging/skein/skein_block.h | 454 ++++++++++++++++++++++++++++++++++
 2 files changed, 466 insertions(+), 461 deletions(-)

diff --git a/drivers/staging/skein/skein_block.c b/drivers/staging/skein/skein_block.c
index 45b4732..ec8292d 100644
--- a/drivers/staging/skein/skein_block.c
+++ b/drivers/staging/skein/skein_block.c
@@ -18,458 +18,6 @@
 #include "skein_base.h"
 #include "skein_block.h"
 
-#ifndef SKEIN_USE_ASM
-#define SKEIN_USE_ASM   (0) /* default is all C code (no ASM) */
-#endif
-
-#ifndef SKEIN_LOOP
-#define SKEIN_LOOP 001 /* default: unroll 256 and 512, but not 1024 */
-#endif
-
-#define BLK_BITS        (WCNT * 64) /* some useful definitions for code here */
-#define KW_TWK_BASE     (0)
-#define KW_KEY_BASE     (3)
-#define ks              (kw + KW_KEY_BASE)
-#define ts              (kw + KW_TWK_BASE)
-
-#ifdef SKEIN_DEBUG
-#define debug_save_tweak(ctx)       \
-{                                   \
-	ctx->h.tweak[0] = ts[0];    \
-	ctx->h.tweak[1] = ts[1];    \
-}
-#else
-#define debug_save_tweak(ctx)
-#endif
-
-#if !(SKEIN_USE_ASM & 256)
-#undef  RCNT
-#define RCNT (SKEIN_256_ROUNDS_TOTAL / 8)
-#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
-#define SKEIN_UNROLL_256 (((SKEIN_LOOP) / 100) % 10)
-#else
-#define SKEIN_UNROLL_256 (0)
-#endif
-
-#if SKEIN_UNROLL_256
-#if (RCNT % SKEIN_UNROLL_256)
-#error "Invalid SKEIN_UNROLL_256" /* sanity check on unroll count */
-#endif
-#endif
-#define ROUND256(p0, p1, p2, p3, ROT, r_num)         \
-	do {                                         \
-		X##p0 += X##p1;                      \
-		X##p1 = rotl_64(X##p1, ROT##_0);     \
-		X##p1 ^= X##p0;                      \
-		X##p2 += X##p3;                      \
-		X##p3 = rotl_64(X##p3, ROT##_1);     \
-		X##p3 ^= X##p2;                      \
-	} while (0)
-
-#if SKEIN_UNROLL_256 == 0
-#define R256(p0, p1, p2, p3, ROT, r_num) /* fully unrolled */ \
-	ROUND256(p0, p1, p2, p3, ROT, r_num)
-
-#define I256(R)                                                         \
-	do {                                                            \
-		/* inject the key schedule value */                     \
-		X0   += ks[((R) + 1) % 5];                              \
-		X1   += ks[((R) + 2) % 5] + ts[((R) + 1) % 3];          \
-		X2   += ks[((R) + 3) % 5] + ts[((R) + 2) % 3];          \
-		X3   += ks[((R) + 4) % 5] + (R) + 1;                    \
-	} while (0)
-#else
-/* looping version */
-#define R256(p0, p1, p2, p3, ROT, r_num) ROUND256(p0, p1, p2, p3, ROT, r_num)
-
-#define I256(R)                                         \
-	do {                                            \
-		/* inject the key schedule value */     \
-		X0 += ks[r + (R) + 0];                  \
-		X1 += ks[r + (R) + 1] + ts[r + (R) + 0];\
-		X2 += ks[r + (R) + 2] + ts[r + (R) + 1];\
-		X3 += ks[r + (R) + 3] + r + (R);        \
-		/* rotate key schedule */               \
-		ks[r + (R) + 4] = ks[r + (R) - 1];      \
-		ts[r + (R) + 2] = ts[r + (R) - 1];      \
-	} while (0)
-#endif
-#define R256_8_ROUNDS(R)                                \
-	do {                                            \
-		R256(0, 1, 2, 3, R_256_0, 8 * (R) + 1); \
-		R256(0, 3, 2, 1, R_256_1, 8 * (R) + 2); \
-		R256(0, 1, 2, 3, R_256_2, 8 * (R) + 3); \
-		R256(0, 3, 2, 1, R_256_3, 8 * (R) + 4); \
-		I256(2 * (R));                          \
-		R256(0, 1, 2, 3, R_256_4, 8 * (R) + 5); \
-		R256(0, 3, 2, 1, R_256_5, 8 * (R) + 6); \
-		R256(0, 1, 2, 3, R_256_6, 8 * (R) + 7); \
-		R256(0, 3, 2, 1, R_256_7, 8 * (R) + 8); \
-		I256(2 * (R) + 1);                      \
-	} while (0)
-
-#define R256_UNROLL_R(NN)                     \
-	((SKEIN_UNROLL_256 == 0 &&            \
-	SKEIN_256_ROUNDS_TOTAL / 8 > (NN)) || \
-	(SKEIN_UNROLL_256 > (NN)))
-
-#if  (SKEIN_UNROLL_256 > 14)
-#error  "need more unrolling in skein_256_process_block"
-#endif
-#endif
-
-#if !(SKEIN_USE_ASM & 512)
-#undef  RCNT
-#define RCNT  (SKEIN_512_ROUNDS_TOTAL/8)
-
-#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
-#define SKEIN_UNROLL_512 (((SKEIN_LOOP)/10)%10)
-#else
-#define SKEIN_UNROLL_512 (0)
-#endif
-
-#if SKEIN_UNROLL_512
-#if (RCNT % SKEIN_UNROLL_512)
-#error "Invalid SKEIN_UNROLL_512" /* sanity check on unroll count */
-#endif
-#endif
-#define ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)    \
-	do {                                                    \
-		X##p0 += X##p1;                                 \
-		X##p1 = rotl_64(X##p1, ROT##_0);                \
-		X##p1 ^= X##p0;                                 \
-		X##p2 += X##p3;                                 \
-		X##p3 = rotl_64(X##p3, ROT##_1);                \
-		X##p3 ^= X##p2;                                 \
-		X##p4 += X##p5;                                 \
-		X##p5 = rotl_64(X##p5, ROT##_2);                \
-		X##p5 ^= X##p4;                                 \
-		X##p6 += X##p7; X##p7 = rotl_64(X##p7, ROT##_3);\
-		X##p7 ^= X##p6;                                 \
-	} while (0)
-
-#if SKEIN_UNROLL_512 == 0
-#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) /* unrolled */ \
-	ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)
-
-#define I512(R)                                                         \
-	do {                                                            \
-		/* inject the key schedule value */                     \
-		X0   += ks[((R) + 1) % 9];                              \
-		X1   += ks[((R) + 2) % 9];                              \
-		X2   += ks[((R) + 3) % 9];                              \
-		X3   += ks[((R) + 4) % 9];                              \
-		X4   += ks[((R) + 5) % 9];                              \
-		X5   += ks[((R) + 6) % 9] + ts[((R) + 1) % 3];          \
-		X6   += ks[((R) + 7) % 9] + ts[((R) + 2) % 3];          \
-		X7   += ks[((R) + 8) % 9] + (R) + 1;                    \
-	} while (0)
-
-#else /* looping version */
-#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)                 \
-	ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)             \
-
-#define I512(R)                                                         \
-	do {                                                            \
-		/* inject the key schedule value */                     \
-		X0   += ks[r + (R) + 0];                                \
-		X1   += ks[r + (R) + 1];                                \
-		X2   += ks[r + (R) + 2];                                \
-		X3   += ks[r + (R) + 3];                                \
-		X4   += ks[r + (R) + 4];                                \
-		X5   += ks[r + (R) + 5] + ts[r + (R) + 0];              \
-		X6   += ks[r + (R) + 6] + ts[r + (R) + 1];              \
-		X7   += ks[r + (R) + 7] + r + (R);                      \
-		/* rotate key schedule */                               \
-		ks[r + (R) + 8] = ks[r + (R) - 1];                      \
-		ts[r + (R) + 2] = ts[r + (R) - 1];                      \
-	} while (0)
-#endif /* end of looped code definitions */
-#define R512_8_ROUNDS(R)  /* do 8 full rounds */                        \
-	do {                                                            \
-		R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_0, 8 * (R) + 1);     \
-		R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_1, 8 * (R) + 2);     \
-		R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_2, 8 * (R) + 3);     \
-		R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_3, 8 * (R) + 4);     \
-		I512(2 * (R));                                          \
-		R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_4, 8 * (R) + 5);     \
-		R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_5, 8 * (R) + 6);     \
-		R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_6, 8 * (R) + 7);     \
-		R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_7, 8 * (R) + 8);     \
-		I512(2 * (R) + 1); /* and key injection */              \
-	} while (0)
-#define R512_UNROLL_R(NN)                             \
-		((SKEIN_UNROLL_512 == 0 &&            \
-		SKEIN_512_ROUNDS_TOTAL/8 > (NN)) ||   \
-		(SKEIN_UNROLL_512 > (NN)))
-
-#if  (SKEIN_UNROLL_512 > 14)
-#error  "need more unrolling in skein_512_process_block"
-#endif
-#endif
-
-#if !(SKEIN_USE_ASM & 1024)
-#undef  RCNT
-#define RCNT  (SKEIN_1024_ROUNDS_TOTAL/8)
-#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
-#define SKEIN_UNROLL_1024 ((SKEIN_LOOP) % 10)
-#else
-#define SKEIN_UNROLL_1024 (0)
-#endif
-
-#if (SKEIN_UNROLL_1024 != 0)
-#if (RCNT % SKEIN_UNROLL_1024)
-#error "Invalid SKEIN_UNROLL_1024" /* sanity check on unroll count */
-#endif
-#endif
-#define ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
-		  pF, ROT, r_num)                                             \
-	do {                                                                  \
-		X##p0 += X##p1;                                               \
-		X##p1 = rotl_64(X##p1, ROT##_0);                              \
-		X##p1 ^= X##p0;                                               \
-		X##p2 += X##p3;                                               \
-		X##p3 = rotl_64(X##p3, ROT##_1);                              \
-		X##p3 ^= X##p2;                                               \
-		X##p4 += X##p5;                                               \
-		X##p5 = rotl_64(X##p5, ROT##_2);                              \
-		X##p5 ^= X##p4;                                               \
-		X##p6 += X##p7;                                               \
-		X##p7 = rotl_64(X##p7, ROT##_3);                              \
-		X##p7 ^= X##p6;                                               \
-		X##p8 += X##p9;                                               \
-		X##p9 = rotl_64(X##p9, ROT##_4);                              \
-		X##p9 ^= X##p8;                                               \
-		X##pA += X##pB;                                               \
-		X##pB = rotl_64(X##pB, ROT##_5);                              \
-		X##pB ^= X##pA;                                               \
-		X##pC += X##pD;                                               \
-		X##pD = rotl_64(X##pD, ROT##_6);                              \
-		X##pD ^= X##pC;                                               \
-		X##pE += X##pF;                                               \
-		X##pF = rotl_64(X##pF, ROT##_7);                              \
-		X##pF ^= X##pE;                                               \
-	} while (0)
-
-#if SKEIN_UNROLL_1024 == 0
-#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
-	      ROT, rn)                                                        \
-	ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
-		  pF, ROT, rn)                                                \
-
-#define I1024(R)                                                \
-	do {                                                    \
-		/* inject the key schedule value */             \
-		X00 += ks[((R) + 1) % 17];                      \
-		X01 += ks[((R) + 2) % 17];                      \
-		X02 += ks[((R) + 3) % 17];                      \
-		X03 += ks[((R) + 4) % 17];                      \
-		X04 += ks[((R) + 5) % 17];                      \
-		X05 += ks[((R) + 6) % 17];                      \
-		X06 += ks[((R) + 7) % 17];                      \
-		X07 += ks[((R) + 8) % 17];                      \
-		X08 += ks[((R) + 9) % 17];                      \
-		X09 += ks[((R) + 10) % 17];                     \
-		X10 += ks[((R) + 11) % 17];                     \
-		X11 += ks[((R) + 12) % 17];                     \
-		X12 += ks[((R) + 13) % 17];                     \
-		X13 += ks[((R) + 14) % 17] + ts[((R) + 1) % 3]; \
-		X14 += ks[((R) + 15) % 17] + ts[((R) + 2) % 3]; \
-		X15 += ks[((R) + 16) % 17] + (R) + 1;           \
-	} while (0)
-#else /* looping version */
-#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
-	      ROT, rn)                                                        \
-	ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
-		  pF, ROT, rn)                                                \
-
-#define I1024(R)                                                        \
-	do {                                                            \
-		/* inject the key schedule value */                     \
-		X00 += ks[r + (R) + 0];                                 \
-		X01 += ks[r + (R) + 1];                                 \
-		X02 += ks[r + (R) + 2];                                 \
-		X03 += ks[r + (R) + 3];                                 \
-		X04 += ks[r + (R) + 4];                                 \
-		X05 += ks[r + (R) + 5];                                 \
-		X06 += ks[r + (R) + 6];                                 \
-		X07 += ks[r + (R) + 7];                                 \
-		X08 += ks[r + (R) + 8];                                 \
-		X09 += ks[r + (R) + 9];                                 \
-		X10 += ks[r + (R) + 10];                                \
-		X11 += ks[r + (R) + 11];                                \
-		X12 += ks[r + (R) + 12];                                \
-		X13 += ks[r + (R) + 13] + ts[r + (R) + 0];              \
-		X14 += ks[r + (R) + 14] + ts[r + (R) + 1];              \
-		X15 += ks[r + (R) + 15] + r + (R);                      \
-		/* rotate key schedule */                               \
-		ks[r + (R) + 16] = ks[r + (R) - 1];                     \
-		ts[r + (R) + 2] = ts[r + (R) - 1];                      \
-	} while (0)
-
-#endif
-#define R1024_8_ROUNDS(R)                                                 \
-	do {                                                              \
-		R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, \
-		      13, 14, 15, R1024_0, 8*(R) + 1);                    \
-		R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, \
-		      05, 08, 01, R1024_1, 8*(R) + 2);                    \
-		R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, \
-		      11, 10, 09, R1024_2, 8*(R) + 3);                    \
-		R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, \
-		      03, 12, 07, R1024_3, 8*(R) + 4);                    \
-		I1024(2*(R));                                             \
-		R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, \
-		      13, 14, 15, R1024_4, 8*(R) + 5);                    \
-		R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, \
-		      05, 08, 01, R1024_5, 8*(R) + 6);                    \
-		R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, \
-		      11, 10, 09, R1024_6, 8*(R) + 7);                    \
-		R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, \
-		      03, 12, 07, R1024_7, 8*(R) + 8);                    \
-		I1024(2*(R)+1);                                           \
-	} while (0)
-
-#define R1024_UNROLL_R(NN)                              \
-		((SKEIN_UNROLL_1024 == 0 &&             \
-		SKEIN_1024_ROUNDS_TOTAL/8 > (NN)) ||    \
-		(SKEIN_UNROLL_1024 > (NN)))
-
-#if  (SKEIN_UNROLL_1024 > 14)
-#error  "need more unrolling in Skein_1024_Process_Block"
-#endif
-#endif
-
-/*****************************  SKEIN_256 ******************************/
-#if !(SKEIN_USE_ASM & 256)
-void skein_256_process_block(struct skein_256_ctx *ctx, const u8 *blk_ptr,
-			     size_t blk_cnt, size_t byte_cnt_add)
-{ /* do it in C */
-	enum {
-		WCNT = SKEIN_256_STATE_WORDS
-	};
-	size_t r;
-#if SKEIN_UNROLL_256
-	/* key schedule: chaining vars + tweak + "rot"*/
-	u64  kw[WCNT+4+RCNT*2];
-#else
-	/* key schedule words : chaining vars + tweak */
-	u64  kw[WCNT+4];
-#endif
-	u64  X0, X1, X2, X3; /* local copy of context vars, for speed */
-	u64  w[WCNT]; /* local copy of input block */
-#ifdef SKEIN_DEBUG
-	const u64 *X_ptr[4]; /* use for debugging (help cc put Xn in regs) */
-
-	X_ptr[0] = &X0;
-	X_ptr[1] = &X1;
-	X_ptr[2] = &X2;
-	X_ptr[3] = &X3;
-#endif
-	skein_assert(blk_cnt != 0); /* never call with blk_cnt == 0! */
-	ts[0] = ctx->h.tweak[0];
-	ts[1] = ctx->h.tweak[1];
-	do  {
-		/*
-		 * this implementation only supports 2**64 input bytes
-		 * (no carry out here)
-		 */
-		ts[0] += byte_cnt_add; /* update processed length */
-
-		/* precompute the key schedule for this block */
-		ks[0] = ctx->x[0];
-		ks[1] = ctx->x[1];
-		ks[2] = ctx->x[2];
-		ks[3] = ctx->x[3];
-		ks[4] = ks[0] ^ ks[1] ^ ks[2] ^ ks[3] ^ SKEIN_KS_PARITY;
-
-		ts[2] = ts[0] ^ ts[1];
-
-		/* get input block in little-endian format */
-		skein_get64_lsb_first(w, blk_ptr, WCNT);
-		debug_save_tweak(ctx);
-
-		/* do the first full key injection */
-		X0 = w[0] + ks[0];
-		X1 = w[1] + ks[1] + ts[0];
-		X2 = w[2] + ks[2] + ts[1];
-		X3 = w[3] + ks[3];
-
-		blk_ptr += SKEIN_256_BLOCK_BYTES;
-
-		/* run the rounds */
-		for (r = 1;
-			r < (SKEIN_UNROLL_256 ? 2 * RCNT : 2);
-			r += (SKEIN_UNROLL_256 ? 2 * SKEIN_UNROLL_256 : 1)) {
-			R256_8_ROUNDS(0);
-#if   R256_UNROLL_R(1)
-			R256_8_ROUNDS(1);
-#endif
-#if   R256_UNROLL_R(2)
-			R256_8_ROUNDS(2);
-#endif
-#if   R256_UNROLL_R(3)
-			R256_8_ROUNDS(3);
-#endif
-#if   R256_UNROLL_R(4)
-			R256_8_ROUNDS(4);
-#endif
-#if   R256_UNROLL_R(5)
-			R256_8_ROUNDS(5);
-#endif
-#if   R256_UNROLL_R(6)
-			R256_8_ROUNDS(6);
-#endif
-#if   R256_UNROLL_R(7)
-			R256_8_ROUNDS(7);
-#endif
-#if   R256_UNROLL_R(8)
-			R256_8_ROUNDS(8);
-#endif
-#if   R256_UNROLL_R(9)
-			R256_8_ROUNDS(9);
-#endif
-#if   R256_UNROLL_R(10)
-			R256_8_ROUNDS(10);
-#endif
-#if   R256_UNROLL_R(11)
-			R256_8_ROUNDS(11);
-#endif
-#if   R256_UNROLL_R(12)
-			R256_8_ROUNDS(12);
-#endif
-#if   R256_UNROLL_R(13)
-			R256_8_ROUNDS(13);
-#endif
-#if   R256_UNROLL_R(14)
-			R256_8_ROUNDS(14);
-#endif
-		}
-		/* do the final "feedforward" xor, update context chaining */
-		ctx->x[0] = X0 ^ w[0];
-		ctx->x[1] = X1 ^ w[1];
-		ctx->x[2] = X2 ^ w[2];
-		ctx->x[3] = X3 ^ w[3];
-
-		ts[1] &= ~SKEIN_T1_FLAG_FIRST;
-	} while (--blk_cnt);
-	ctx->h.tweak[0] = ts[0];
-	ctx->h.tweak[1] = ts[1];
-}
-
-#if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
-size_t skein_256_process_block_code_size(void)
-{
-	return ((u8 *) skein_256_process_block_code_size) -
-		((u8 *) skein_256_process_block);
-}
-unsigned int skein_256_unroll_cnt(void)
-{
-	return SKEIN_UNROLL_256;
-}
-#endif
-#endif
-
 /*****************************  SKEIN_512 ******************************/
 #if !(SKEIN_USE_ASM & 512)
 void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
@@ -480,9 +28,9 @@ void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
 	};
 	size_t  r;
 #if SKEIN_UNROLL_512
-	u64  kw[WCNT+4+RCNT*2]; /* key sched: chaining vars + tweak + "rot"*/
+	u64  kw[WCNT + 4 + RCNT * 2]; /* key sched: chaining vars + tweak + "rot"*/
 #else
-	u64  kw[WCNT+4]; /* key schedule words : chaining vars + tweak */
+	u64  kw[WCNT + 4]; /* key schedule words : chaining vars + tweak */
 #endif
 	u64  X0, X1, X2, X3, X4, X5, X6, X7; /* local copies, for speed */
 	u64  w[WCNT]; /* local copy of input block */
@@ -543,7 +91,6 @@ void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
 		for (r = 1;
 			r < (SKEIN_UNROLL_512 ? 2 * RCNT : 2);
 			r += (SKEIN_UNROLL_512 ? 2 * SKEIN_UNROLL_512 : 1)) {
-
 			R512_8_ROUNDS(0);
 
 #if   R512_UNROLL_R(1)
@@ -609,10 +156,12 @@ void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
 #if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
 size_t skein_512_process_block_code_size(void)
 {
-	return ((u8 *) skein_512_process_block_code_size) -
-		((u8 *) skein_512_process_block);
+	return ((u8 *)skein_512_process_block_code_size) -
+		((u8 *)skein_512_process_block);
 }
+
 unsigned int skein_512_unroll_cnt(void)
+
 {
 	return SKEIN_UNROLL_512;
 }
@@ -629,9 +178,9 @@ void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
 	};
 	size_t  r;
 #if (SKEIN_UNROLL_1024 != 0)
-	u64  kw[WCNT+4+RCNT*2]; /* key sched: chaining vars + tweak + "rot" */
+	u64  kw[WCNT + 4 + RCNT * 2]; /* key sched: chaining vars + tweak + "rot" */
 #else
-	u64  kw[WCNT+4]; /* key schedule words : chaining vars + tweak */
+	u64  kw[WCNT + 4]; /* key schedule words : chaining vars + tweak */
 #endif
 
 	/* local copy of vars, for speed */
@@ -771,10 +320,12 @@ void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
 #if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
 size_t skein_1024_process_block_code_size(void)
 {
-	return ((u8 *) skein_1024_process_block_code_size) -
-		((u8 *) skein_1024_process_block);
+	return ((u8 *)skein_1024_process_block_code_size) -
+		((u8 *)skein_1024_process_block);
 }
+
 unsigned int skein_1024_unroll_cnt(void)
+
 {
 	return SKEIN_UNROLL_1024;
 }
diff --git a/drivers/staging/skein/skein_block.h b/drivers/staging/skein/skein_block.h
index 9d40f4a..e339ba6 100644
--- a/drivers/staging/skein/skein_block.h
+++ b/drivers/staging/skein/skein_block.h
@@ -20,3 +20,457 @@ void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
 			      size_t blk_cnt, size_t byte_cnt_add);
 
 #endif
+
+#ifndef SKEIN_USE_ASM
+#define SKEIN_USE_ASM   (0) /* default is all C code (no ASM) */
+#endif
+
+#ifndef SKEIN_LOOP
+#define SKEIN_LOOP 001 /* default: unroll 256 and 512, but not 1024 */
+#endif
+
+#define BLK_BITS        (WCNT * 64) /* some useful definitions for code here */
+#define KW_TWK_BASE     (0)
+#define KW_KEY_BASE     (3)
+#define ks              (kw + KW_KEY_BASE)
+#define ts              (kw + KW_TWK_BASE)
+
+#ifdef SKEIN_DEBUG
+#define debug_save_tweak(ctx)       \
+{                                   \
+	ctx->h.tweak[0] = ts[0];    \
+	ctx->h.tweak[1] = ts[1];    \
+}
+#else
+#define debug_save_tweak(ctx)
+#endif
+
+#if !(SKEIN_USE_ASM & 256)
+#undef  RCNT
+#define RCNT (SKEIN_256_ROUNDS_TOTAL / 8)
+#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
+#define SKEIN_UNROLL_256 (((SKEIN_LOOP) / 100) % 10)
+#else
+#define SKEIN_UNROLL_256 (0)
+#endif
+
+#if SKEIN_UNROLL_256
+#if (RCNT % SKEIN_UNROLL_256)
+#error "Invalid SKEIN_UNROLL_256" /* sanity check on unroll count */
+#endif
+#endif
+#define ROUND256(p0, p1, p2, p3, ROT, r_num)         \
+	do {                                         \
+		X##p0 += X##p1;                      \
+		X##p1 = rotl_64(X##p1, ROT##_0);     \
+		X##p1 ^= X##p0;                      \
+		X##p2 += X##p3;                      \
+		X##p3 = rotl_64(X##p3, ROT##_1);     \
+		X##p3 ^= X##p2;                      \
+	} while (0)
+
+#if SKEIN_UNROLL_256 == 0
+#define R256(p0, p1, p2, p3, ROT, r_num) /* fully unrolled */ \
+	ROUND256(p0, p1, p2, p3, ROT, r_num)
+
+#define I256(R)                                                         \
+	do {                                                            \
+		/* inject the key schedule value */                     \
+		X0   += ks[((R) + 1) % 5];                              \
+		X1   += ks[((R) + 2) % 5] + ts[((R) + 1) % 3];          \
+		X2   += ks[((R) + 3) % 5] + ts[((R) + 2) % 3];          \
+		X3   += ks[((R) + 4) % 5] + (R) + 1;                    \
+	} while (0)
+#else
+/* looping version */
+#define R256(p0, p1, p2, p3, ROT, r_num) ROUND256(p0, p1, p2, p3, ROT, r_num)
+
+#define I256(R)                                         \
+	do {                                            \
+		/* inject the key schedule value */     \
+		X0 += ks[r + (R) + 0];                  \
+		X1 += ks[r + (R) + 1] + ts[r + (R) + 0];\
+		X2 += ks[r + (R) + 2] + ts[r + (R) + 1];\
+		X3 += ks[r + (R) + 3] + r + (R);        \
+		/* rotate key schedule */               \
+		ks[r + (R) + 4] = ks[r + (R) - 1];      \
+		ts[r + (R) + 2] = ts[r + (R) - 1];      \
+	} while (0)
+#endif
+#define R256_8_ROUNDS(R)                                \
+	do {                                            \
+		R256(0, 1, 2, 3, R_256_0, 8 * (R) + 1); \
+		R256(0, 3, 2, 1, R_256_1, 8 * (R) + 2); \
+		R256(0, 1, 2, 3, R_256_2, 8 * (R) + 3); \
+		R256(0, 3, 2, 1, R_256_3, 8 * (R) + 4); \
+		I256(2 * (R));                          \
+		R256(0, 1, 2, 3, R_256_4, 8 * (R) + 5); \
+		R256(0, 3, 2, 1, R_256_5, 8 * (R) + 6); \
+		R256(0, 1, 2, 3, R_256_6, 8 * (R) + 7); \
+		R256(0, 3, 2, 1, R_256_7, 8 * (R) + 8); \
+		I256(2 * (R) + 1);                      \
+	} while (0)
+
+#define R256_UNROLL_R(NN)                     \
+	((SKEIN_UNROLL_256 == 0 &&            \
+	SKEIN_256_ROUNDS_TOTAL / 8 > (NN)) || \
+	(SKEIN_UNROLL_256 > (NN)))
+
+#if  (SKEIN_UNROLL_256 > 14)
+#error  "need more unrolling in skein_256_process_block"
+#endif
+#endif
+
+#if !(SKEIN_USE_ASM & 512)
+#undef  RCNT
+#define RCNT  (SKEIN_512_ROUNDS_TOTAL / 8)
+
+#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
+#define SKEIN_UNROLL_512 (((SKEIN_LOOP) / 10) % 10)
+#else
+#define SKEIN_UNROLL_512 (0)
+#endif
+
+#if SKEIN_UNROLL_512
+#if (RCNT % SKEIN_UNROLL_512)
+#error "Invalid SKEIN_UNROLL_512" /* sanity check on unroll count */
+#endif
+#endif
+#define ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)    \
+	do {                                                    \
+		X##p0 += X##p1;                                 \
+		X##p1 = rotl_64(X##p1, ROT##_0);                \
+		X##p1 ^= X##p0;                                 \
+		X##p2 += X##p3;                                 \
+		X##p3 = rotl_64(X##p3, ROT##_1);                \
+		X##p3 ^= X##p2;                                 \
+		X##p4 += X##p5;                                 \
+		X##p5 = rotl_64(X##p5, ROT##_2);                \
+		X##p5 ^= X##p4;                                 \
+		X##p6 += X##p7; X##p7 = rotl_64(X##p7, ROT##_3);\
+		X##p7 ^= X##p6;                                 \
+	} while (0)
+
+#if SKEIN_UNROLL_512 == 0
+#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) /* unrolled */ \
+	ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)
+
+#define I512(R)                                                         \
+	do {                                                            \
+		/* inject the key schedule value */                     \
+		X0   += ks[((R) + 1) % 9];                              \
+		X1   += ks[((R) + 2) % 9];                              \
+		X2   += ks[((R) + 3) % 9];                              \
+		X3   += ks[((R) + 4) % 9];                              \
+		X4   += ks[((R) + 5) % 9];                              \
+		X5   += ks[((R) + 6) % 9] + ts[((R) + 1) % 3];          \
+		X6   += ks[((R) + 7) % 9] + ts[((R) + 2) % 3];          \
+		X7   += ks[((R) + 8) % 9] + (R) + 1;                    \
+	} while (0)
+
+#else /* looping version */
+#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)                 \
+	ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)             \
+
+#define I512(R)                                                         \
+	do {                                                            \
+		/* inject the key schedule value */                     \
+		X0   += ks[r + (R) + 0];                                \
+		X1   += ks[r + (R) + 1];                                \
+		X2   += ks[r + (R) + 2];                                \
+		X3   += ks[r + (R) + 3];                                \
+		X4   += ks[r + (R) + 4];                                \
+		X5   += ks[r + (R) + 5] + ts[r + (R) + 0];              \
+		X6   += ks[r + (R) + 6] + ts[r + (R) + 1];              \
+		X7   += ks[r + (R) + 7] + r + (R);                      \
+		/* rotate key schedule */                               \
+		ks[r + (R) + 8] = ks[r + (R) - 1];                      \
+		ts[r + (R) + 2] = ts[r + (R) - 1];                      \
+	} while (0)
+#endif /* end of looped code definitions */
+#define R512_8_ROUNDS(R)  /* do 8 full rounds */                        \
+	do {                                                            \
+		R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_0, 8 * (R) + 1);     \
+		R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_1, 8 * (R) + 2);     \
+		R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_2, 8 * (R) + 3);     \
+		R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_3, 8 * (R) + 4);     \
+		I512(2 * (R));                                          \
+		R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_4, 8 * (R) + 5);     \
+		R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_5, 8 * (R) + 6);     \
+		R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_6, 8 * (R) + 7);     \
+		R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_7, 8 * (R) + 8);     \
+		I512(2 * (R) + 1); /* and key injection */              \
+	} while (0)
+#define R512_UNROLL_R(NN)                             \
+		((SKEIN_UNROLL_512 == 0 &&            \
+		SKEIN_512_ROUNDS_TOTAL / 8 > (NN)) ||   \
+		(SKEIN_UNROLL_512 > (NN)))
+
+#if  (SKEIN_UNROLL_512 > 14)
+#error  "need more unrolling in skein_512_process_block"
+#endif
+#endif
+
+#if !(SKEIN_USE_ASM & 1024)
+#undef  RCNT
+#define RCNT  (SKEIN_1024_ROUNDS_TOTAL / 8)
+#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
+#define SKEIN_UNROLL_1024 ((SKEIN_LOOP) % 10)
+#else
+#define SKEIN_UNROLL_1024 (0)
+#endif
+
+#if (SKEIN_UNROLL_1024 != 0)
+#if (RCNT % SKEIN_UNROLL_1024)
+#error "Invalid SKEIN_UNROLL_1024" /* sanity check on unroll count */
+#endif
+#endif
+#define ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
+		  pF, ROT, r_num)                                             \
+	do {                                                                  \
+		X##p0 += X##p1;                                               \
+		X##p1 = rotl_64(X##p1, ROT##_0);                              \
+		X##p1 ^= X##p0;                                               \
+		X##p2 += X##p3;                                               \
+		X##p3 = rotl_64(X##p3, ROT##_1);                              \
+		X##p3 ^= X##p2;                                               \
+		X##p4 += X##p5;                                               \
+		X##p5 = rotl_64(X##p5, ROT##_2);                              \
+		X##p5 ^= X##p4;                                               \
+		X##p6 += X##p7;                                               \
+		X##p7 = rotl_64(X##p7, ROT##_3);                              \
+		X##p7 ^= X##p6;                                               \
+		X##p8 += X##p9;                                               \
+		X##p9 = rotl_64(X##p9, ROT##_4);                              \
+		X##p9 ^= X##p8;                                               \
+		X##pA += X##pB;                                               \
+		X##pB = rotl_64(X##pB, ROT##_5);                              \
+		X##pB ^= X##pA;                                               \
+		X##pC += X##pD;                                               \
+		X##pD = rotl_64(X##pD, ROT##_6);                              \
+		X##pD ^= X##pC;                                               \
+		X##pE += X##pF;                                               \
+		X##pF = rotl_64(X##pF, ROT##_7);                              \
+		X##pF ^= X##pE;                                               \
+	} while (0)
+
+#if SKEIN_UNROLL_1024 == 0
+#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
+	      ROT, rn)                                                        \
+	ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
+		  pF, ROT, rn)                                                \
+
+#define I1024(R)                                                \
+	do {                                                    \
+		/* inject the key schedule value */             \
+		X00 += ks[((R) + 1) % 17];                      \
+		X01 += ks[((R) + 2) % 17];                      \
+		X02 += ks[((R) + 3) % 17];                      \
+		X03 += ks[((R) + 4) % 17];                      \
+		X04 += ks[((R) + 5) % 17];                      \
+		X05 += ks[((R) + 6) % 17];                      \
+		X06 += ks[((R) + 7) % 17];                      \
+		X07 += ks[((R) + 8) % 17];                      \
+		X08 += ks[((R) + 9) % 17];                      \
+		X09 += ks[((R) + 10) % 17];                     \
+		X10 += ks[((R) + 11) % 17];                     \
+		X11 += ks[((R) + 12) % 17];                     \
+		X12 += ks[((R) + 13) % 17];                     \
+		X13 += ks[((R) + 14) % 17] + ts[((R) + 1) % 3]; \
+		X14 += ks[((R) + 15) % 17] + ts[((R) + 2) % 3]; \
+		X15 += ks[((R) + 16) % 17] + (R) + 1;           \
+	} while (0)
+#else /* looping version */
+#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
+	      ROT, rn)                                                        \
+	ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
+		  pF, ROT, rn)                                                \
+
+#define I1024(R)                                                        \
+	do {                                                            \
+		/* inject the key schedule value */                     \
+		X00 += ks[r + (R) + 0];                                 \
+		X01 += ks[r + (R) + 1];                                 \
+		X02 += ks[r + (R) + 2];                                 \
+		X03 += ks[r + (R) + 3];                                 \
+		X04 += ks[r + (R) + 4];                                 \
+		X05 += ks[r + (R) + 5];                                 \
+		X06 += ks[r + (R) + 6];                                 \
+		X07 += ks[r + (R) + 7];                                 \
+		X08 += ks[r + (R) + 8];                                 \
+		X09 += ks[r + (R) + 9];                                 \
+		X10 += ks[r + (R) + 10];                                \
+		X11 += ks[r + (R) + 11];                                \
+		X12 += ks[r + (R) + 12];                                \
+		X13 += ks[r + (R) + 13] + ts[r + (R) + 0];              \
+		X14 += ks[r + (R) + 14] + ts[r + (R) + 1];              \
+		X15 += ks[r + (R) + 15] + r + (R);                      \
+		/* rotate key schedule */                               \
+		ks[r + (R) + 16] = ks[r + (R) - 1];                     \
+		ts[r + (R) + 2] = ts[r + (R) - 1];                      \
+	} while (0)
+
+#endif
+#define R1024_8_ROUNDS(R)                                                 \
+	do {                                                              \
+		R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, \
+		      13, 14, 15, R1024_0, 8 * (R) + 1);                    \
+		R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, \
+		      05, 08, 01, R1024_1, 8 * (R) + 2);                    \
+		R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, \
+		      11, 10, 09, R1024_2, 8 * (R) + 3);                    \
+		R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, \
+		      03, 12, 07, R1024_3, 8 * (R) + 4);                    \
+		I1024(2 * (R));                                             \
+		R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, \
+		      13, 14, 15, R1024_4, 8 * (R) + 5);                    \
+		R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, \
+		      05, 08, 01, R1024_5, 8 * (R) + 6);                    \
+		R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, \
+		      11, 10, 09, R1024_6, 8 * (R) + 7);                    \
+		R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, \
+		      03, 12, 07, R1024_7, 8 * (R) + 8);                    \
+		I1024(2 * (R) + 1);                                           \
+	} while (0)
+
+#define R1024_UNROLL_R(NN)                              \
+		((SKEIN_UNROLL_1024 == 0 &&             \
+		SKEIN_1024_ROUNDS_TOTAL / 8 > (NN)) ||    \
+		(SKEIN_UNROLL_1024 > (NN)))
+
+#if  (SKEIN_UNROLL_1024 > 14)
+#error  "need more unrolling in Skein_1024_Process_Block"
+#endif
+#endif
+
+/*****************************  SKEIN_256 ******************************/
+#if !(SKEIN_USE_ASM & 256)
+void skein_256_process_block(struct skein_256_ctx *ctx, const u8 *blk_ptr,
+			     size_t blk_cnt, size_t byte_cnt_add)
+{ /* do it in C */
+	enum {
+		WCNT = SKEIN_256_STATE_WORDS
+	};
+	size_t r;
+#if SKEIN_UNROLL_256
+	/* key schedule: chaining vars + tweak + "rot"*/
+	u64  kw[WCNT + 4 + RCNT * 2];
+#else
+	/* key schedule words : chaining vars + tweak */
+	u64  kw[WCNT + 4];
+#endif
+	u64  X0, X1, X2, X3; /* local copy of context vars, for speed */
+	u64  w[WCNT]; /* local copy of input block */
+#ifdef SKEIN_DEBUG
+	const u64 *X_ptr[4]; /* use for debugging (help cc put Xn in regs) */
+
+	X_ptr[0] = &X0;
+	X_ptr[1] = &X1;
+	X_ptr[2] = &X2;
+	X_ptr[3] = &X3;
+#endif
+	skein_assert(blk_cnt != 0); /* never call with blk_cnt == 0! */
+	ts[0] = ctx->h.tweak[0];
+	ts[1] = ctx->h.tweak[1];
+	do  {
+		/*
+		 * this implementation only supports 2**64 input bytes
+		 * (no carry out here)
+		 */
+		ts[0] += byte_cnt_add; /* update processed length */
+
+		/* precompute the key schedule for this block */
+		ks[0] = ctx->x[0];
+		ks[1] = ctx->x[1];
+		ks[2] = ctx->x[2];
+		ks[3] = ctx->x[3];
+		ks[4] = ks[0] ^ ks[1] ^ ks[2] ^ ks[3] ^ SKEIN_KS_PARITY;
+
+		ts[2] = ts[0] ^ ts[1];
+
+		/* get input block in little-endian format */
+		skein_get64_lsb_first(w, blk_ptr, WCNT);
+		debug_save_tweak(ctx);
+
+		/* do the first full key injection */
+		X0 = w[0] + ks[0];
+		X1 = w[1] + ks[1] + ts[0];
+		X2 = w[2] + ks[2] + ts[1];
+		X3 = w[3] + ks[3];
+
+		blk_ptr += SKEIN_256_BLOCK_BYTES;
+
+		/* run the rounds */
+		for (r = 1;
+			r < (SKEIN_UNROLL_256 ? 2 * RCNT : 2);
+			r += (SKEIN_UNROLL_256 ? 2 * SKEIN_UNROLL_256 : 1)) {
+			R256_8_ROUNDS(0);
+#if   R256_UNROLL_R(1)
+			R256_8_ROUNDS(1);
+#endif
+#if   R256_UNROLL_R(2)
+			R256_8_ROUNDS(2);
+#endif
+#if   R256_UNROLL_R(3)
+			R256_8_ROUNDS(3);
+#endif
+#if   R256_UNROLL_R(4)
+			R256_8_ROUNDS(4);
+#endif
+#if   R256_UNROLL_R(5)
+			R256_8_ROUNDS(5);
+#endif
+#if   R256_UNROLL_R(6)
+			R256_8_ROUNDS(6);
+#endif
+#if   R256_UNROLL_R(7)
+			R256_8_ROUNDS(7);
+#endif
+#if   R256_UNROLL_R(8)
+			R256_8_ROUNDS(8);
+#endif
+#if   R256_UNROLL_R(9)
+			R256_8_ROUNDS(9);
+#endif
+#if   R256_UNROLL_R(10)
+			R256_8_ROUNDS(10);
+#endif
+#if   R256_UNROLL_R(11)
+			R256_8_ROUNDS(11);
+#endif
+#if   R256_UNROLL_R(12)
+			R256_8_ROUNDS(12);
+#endif
+#if   R256_UNROLL_R(13)
+			R256_8_ROUNDS(13);
+#endif
+#if   R256_UNROLL_R(14)
+			R256_8_ROUNDS(14);
+#endif
+		}
+		/* do the final "feedforward" xor, update context chaining */
+		ctx->x[0] = X0 ^ w[0];
+		ctx->x[1] = X1 ^ w[1];
+		ctx->x[2] = X2 ^ w[2];
+		ctx->x[3] = X3 ^ w[3];
+
+		ts[1] &= ~SKEIN_T1_FLAG_FIRST;
+	} while (--blk_cnt);
+	ctx->h.tweak[0] = ts[0];
+	ctx->h.tweak[1] = ts[1];
+}
+
+#if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
+size_t skein_256_process_block_code_size(void)
+{
+	return ((u8 *)skein_256_process_block_code_size) -
+		((u8 *)skein_256_process_block);
+}
+
+unsigned int skein_256_unroll_cnt(void)
+
+{
+	return SKEIN_UNROLL_256;
+}
+#endif
+#endif
-- 
2.5.0

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