diff options
Diffstat (limited to 'arch/arm64/crypto/sm4-neon-core.S')
-rw-r--r-- | arch/arm64/crypto/sm4-neon-core.S | 630 |
1 files changed, 411 insertions, 219 deletions
diff --git a/arch/arm64/crypto/sm4-neon-core.S b/arch/arm64/crypto/sm4-neon-core.S index 3d5256b354d2..f295b4b7d70a 100644 --- a/arch/arm64/crypto/sm4-neon-core.S +++ b/arch/arm64/crypto/sm4-neon-core.S @@ -18,6 +18,11 @@ #define RTMP2 v10 #define RTMP3 v11 +#define RTMP4 v12 +#define RTMP5 v13 +#define RTMP6 v14 +#define RTMP7 v15 + #define RX0 v12 #define RX1 v13 #define RKEY v14 @@ -25,7 +30,7 @@ /* Helper macros. */ -#define PREPARE \ +#define SM4_PREPARE() \ adr_l x5, crypto_sm4_sbox; \ ld1 {v16.16b-v19.16b}, [x5], #64; \ ld1 {v20.16b-v23.16b}, [x5], #64; \ @@ -42,7 +47,25 @@ zip1 s2.2d, RTMP2.2d, RTMP3.2d; \ zip2 s3.2d, RTMP2.2d, RTMP3.2d; -#define rotate_clockwise_90(s0, s1, s2, s3) \ +#define transpose_4x4_2x(s0, s1, s2, s3, s4, s5, s6, s7) \ + zip1 RTMP0.4s, s0.4s, s1.4s; \ + zip1 RTMP1.4s, s2.4s, s3.4s; \ + zip2 RTMP2.4s, s0.4s, s1.4s; \ + zip2 RTMP3.4s, s2.4s, s3.4s; \ + zip1 RTMP4.4s, s4.4s, s5.4s; \ + zip1 RTMP5.4s, s6.4s, s7.4s; \ + zip2 RTMP6.4s, s4.4s, s5.4s; \ + zip2 RTMP7.4s, s6.4s, s7.4s; \ + zip1 s0.2d, RTMP0.2d, RTMP1.2d; \ + zip2 s1.2d, RTMP0.2d, RTMP1.2d; \ + zip1 s2.2d, RTMP2.2d, RTMP3.2d; \ + zip2 s3.2d, RTMP2.2d, RTMP3.2d; \ + zip1 s4.2d, RTMP4.2d, RTMP5.2d; \ + zip2 s5.2d, RTMP4.2d, RTMP5.2d; \ + zip1 s6.2d, RTMP6.2d, RTMP7.2d; \ + zip2 s7.2d, RTMP6.2d, RTMP7.2d; + +#define rotate_clockwise_4x4(s0, s1, s2, s3) \ zip1 RTMP0.4s, s1.4s, s0.4s; \ zip2 RTMP1.4s, s1.4s, s0.4s; \ zip1 RTMP2.4s, s3.4s, s2.4s; \ @@ -52,6 +75,24 @@ zip1 s2.2d, RTMP3.2d, RTMP1.2d; \ zip2 s3.2d, RTMP3.2d, RTMP1.2d; +#define rotate_clockwise_4x4_2x(s0, s1, s2, s3, s4, s5, s6, s7) \ + zip1 RTMP0.4s, s1.4s, s0.4s; \ + zip1 RTMP2.4s, s3.4s, s2.4s; \ + zip2 RTMP1.4s, s1.4s, s0.4s; \ + zip2 RTMP3.4s, s3.4s, s2.4s; \ + zip1 RTMP4.4s, s5.4s, s4.4s; \ + zip1 RTMP6.4s, s7.4s, s6.4s; \ + zip2 RTMP5.4s, s5.4s, s4.4s; \ + zip2 RTMP7.4s, s7.4s, s6.4s; \ + zip1 s0.2d, RTMP2.2d, RTMP0.2d; \ + zip2 s1.2d, RTMP2.2d, RTMP0.2d; \ + zip1 s2.2d, RTMP3.2d, RTMP1.2d; \ + zip2 s3.2d, RTMP3.2d, RTMP1.2d; \ + zip1 s4.2d, RTMP6.2d, RTMP4.2d; \ + zip2 s5.2d, RTMP6.2d, RTMP4.2d; \ + zip1 s6.2d, RTMP7.2d, RTMP5.2d; \ + zip2 s7.2d, RTMP7.2d, RTMP5.2d; + #define ROUND4(round, s0, s1, s2, s3) \ dup RX0.4s, RKEY.s[round]; \ /* rk ^ s1 ^ s2 ^ s3 */ \ @@ -87,14 +128,7 @@ /* s0 ^= RTMP3 */ \ eor s0.16b, s0.16b, RTMP3.16b; -#define SM4_CRYPT_BLK4(b0, b1, b2, b3) \ - rev32 b0.16b, b0.16b; \ - rev32 b1.16b, b1.16b; \ - rev32 b2.16b, b2.16b; \ - rev32 b3.16b, b3.16b; \ - \ - transpose_4x4(b0, b1, b2, b3); \ - \ +#define SM4_CRYPT_BLK4_BE(b0, b1, b2, b3) \ mov x6, 8; \ 4: \ ld1 {RKEY.4s}, [x0], #16; \ @@ -107,15 +141,23 @@ \ bne 4b; \ \ - rotate_clockwise_90(b0, b1, b2, b3); \ rev32 b0.16b, b0.16b; \ rev32 b1.16b, b1.16b; \ rev32 b2.16b, b2.16b; \ rev32 b3.16b, b3.16b; \ \ + rotate_clockwise_4x4(b0, b1, b2, b3); \ + \ /* repoint to rkey */ \ sub x0, x0, #128; +#define SM4_CRYPT_BLK4(b0, b1, b2, b3) \ + rev32 b0.16b, b0.16b; \ + rev32 b1.16b, b1.16b; \ + rev32 b2.16b, b2.16b; \ + rev32 b3.16b, b3.16b; \ + SM4_CRYPT_BLK4_BE(b0, b1, b2, b3); + #define ROUND8(round, s0, s1, s2, s3, t0, t1, t2, t3) \ /* rk ^ s1 ^ s2 ^ s3 */ \ dup RX0.4s, RKEY.s[round]; \ @@ -175,7 +217,7 @@ eor s0.16b, s0.16b, RTMP0.16b; \ eor t0.16b, t0.16b, RTMP1.16b; -#define SM4_CRYPT_BLK8(b0, b1, b2, b3, b4, b5, b6, b7) \ +#define SM4_CRYPT_BLK8_norotate(b0, b1, b2, b3, b4, b5, b6, b7) \ rev32 b0.16b, b0.16b; \ rev32 b1.16b, b1.16b; \ rev32 b2.16b, b2.16b; \ @@ -185,9 +227,6 @@ rev32 b6.16b, b6.16b; \ rev32 b7.16b, b7.16b; \ \ - transpose_4x4(b0, b1, b2, b3); \ - transpose_4x4(b4, b5, b6, b7); \ - \ mov x6, 8; \ 8: \ ld1 {RKEY.4s}, [x0], #16; \ @@ -200,8 +239,6 @@ \ bne 8b; \ \ - rotate_clockwise_90(b0, b1, b2, b3); \ - rotate_clockwise_90(b4, b5, b6, b7); \ rev32 b0.16b, b0.16b; \ rev32 b1.16b, b1.16b; \ rev32 b2.16b, b2.16b; \ @@ -214,274 +251,429 @@ /* repoint to rkey */ \ sub x0, x0, #128; +#define SM4_CRYPT_BLK8(b0, b1, b2, b3, b4, b5, b6, b7) \ + SM4_CRYPT_BLK8_norotate(b0, b1, b2, b3, b4, b5, b6, b7); \ + rotate_clockwise_4x4_2x(b0, b1, b2, b3, b4, b5, b6, b7); \ -.align 3 -SYM_FUNC_START_LOCAL(__sm4_neon_crypt_blk1_4) - /* input: - * x0: round key array, CTX - * x1: dst - * x2: src - * w3: num blocks (1..4) - */ - PREPARE; - - ld1 {v0.16b}, [x2], #16; - mov v1.16b, v0.16b; - mov v2.16b, v0.16b; - mov v3.16b, v0.16b; - cmp w3, #2; - blt .Lblk4_load_input_done; - ld1 {v1.16b}, [x2], #16; - beq .Lblk4_load_input_done; - ld1 {v2.16b}, [x2], #16; - cmp w3, #3; - beq .Lblk4_load_input_done; - ld1 {v3.16b}, [x2]; - -.Lblk4_load_input_done: - SM4_CRYPT_BLK4(v0, v1, v2, v3); - - st1 {v0.16b}, [x1], #16; - cmp w3, #2; - blt .Lblk4_store_output_done; - st1 {v1.16b}, [x1], #16; - beq .Lblk4_store_output_done; - st1 {v2.16b}, [x1], #16; - cmp w3, #3; - beq .Lblk4_store_output_done; - st1 {v3.16b}, [x1]; - -.Lblk4_store_output_done: - ret; -SYM_FUNC_END(__sm4_neon_crypt_blk1_4) .align 3 -SYM_FUNC_START(sm4_neon_crypt_blk1_8) +SYM_FUNC_START(sm4_neon_crypt) /* input: * x0: round key array, CTX * x1: dst * x2: src - * w3: num blocks (1..8) + * w3: nblocks */ - cmp w3, #5; - blt __sm4_neon_crypt_blk1_4; - - PREPARE; - - ld1 {v0.16b-v3.16b}, [x2], #64; - ld1 {v4.16b}, [x2], #16; - mov v5.16b, v4.16b; - mov v6.16b, v4.16b; - mov v7.16b, v4.16b; - beq .Lblk8_load_input_done; - ld1 {v5.16b}, [x2], #16; - cmp w3, #7; - blt .Lblk8_load_input_done; - ld1 {v6.16b}, [x2], #16; - beq .Lblk8_load_input_done; - ld1 {v7.16b}, [x2]; - -.Lblk8_load_input_done: - SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); - - cmp w3, #6; - st1 {v0.16b-v3.16b}, [x1], #64; - st1 {v4.16b}, [x1], #16; - blt .Lblk8_store_output_done; - st1 {v5.16b}, [x1], #16; - beq .Lblk8_store_output_done; - st1 {v6.16b}, [x1], #16; - cmp w3, #7; - beq .Lblk8_store_output_done; - st1 {v7.16b}, [x1]; - -.Lblk8_store_output_done: - ret; -SYM_FUNC_END(sm4_neon_crypt_blk1_8) + SM4_PREPARE() -.align 3 -SYM_FUNC_START(sm4_neon_crypt_blk8) - /* input: - * x0: round key array, CTX - * x1: dst - * x2: src - * w3: nblocks (multiples of 8) - */ - PREPARE; +.Lcrypt_loop_8x: + sub w3, w3, #8 + tbnz w3, #31, .Lcrypt_4x + + ld4 {v0.4s-v3.4s}, [x2], #64 + ld4 {v4.4s-v7.4s}, [x2], #64 -.Lcrypt_loop_blk: - subs w3, w3, #8; - bmi .Lcrypt_end; + SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7) - ld1 {v0.16b-v3.16b}, [x2], #64; - ld1 {v4.16b-v7.16b}, [x2], #64; + st1 {v0.16b-v3.16b}, [x1], #64 + st1 {v4.16b-v7.16b}, [x1], #64 - SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); + cbz w3, .Lcrypt_end + b .Lcrypt_loop_8x - st1 {v0.16b-v3.16b}, [x1], #64; - st1 {v4.16b-v7.16b}, [x1], #64; +.Lcrypt_4x: + add w3, w3, #8 + cmp w3, #4 + blt .Lcrypt_tail - b .Lcrypt_loop_blk; + sub w3, w3, #4 + + ld4 {v0.4s-v3.4s}, [x2], #64 + + SM4_CRYPT_BLK4(v0, v1, v2, v3) + + st1 {v0.16b-v3.16b}, [x1], #64 + + cbz w3, .Lcrypt_end + +.Lcrypt_tail: + cmp w3, #2 + ld1 {v0.16b}, [x2], #16 + blt .Lcrypt_tail_load_done + ld1 {v1.16b}, [x2], #16 + beq .Lcrypt_tail_load_done + ld1 {v2.16b}, [x2], #16 + +.Lcrypt_tail_load_done: + transpose_4x4(v0, v1, v2, v3) + + SM4_CRYPT_BLK4(v0, v1, v2, v3) + + cmp w3, #2 + st1 {v0.16b}, [x1], #16 + blt .Lcrypt_end + st1 {v1.16b}, [x1], #16 + beq .Lcrypt_end + st1 {v2.16b}, [x1], #16 .Lcrypt_end: - ret; -SYM_FUNC_END(sm4_neon_crypt_blk8) + ret +SYM_FUNC_END(sm4_neon_crypt) .align 3 -SYM_FUNC_START(sm4_neon_cbc_dec_blk8) +SYM_FUNC_START(sm4_neon_cbc_dec) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: iv (big endian, 128 bit) - * w4: nblocks (multiples of 8) + * w4: nblocks */ - PREPARE; + SM4_PREPARE() + + ld1 {RIV.16b}, [x3] + +.Lcbc_dec_loop_8x: + sub w4, w4, #8 + tbnz w4, #31, .Lcbc_dec_4x + + ld4 {v0.4s-v3.4s}, [x2], #64 + ld4 {v4.4s-v7.4s}, [x2] + + SM4_CRYPT_BLK8_norotate(v0, v1, v2, v3, v4, v5, v6, v7) + + /* Avoid overwriting the RIV register */ + rotate_clockwise_4x4(v0, v1, v2, v3) + rotate_clockwise_4x4(v4, v5, v6, v7) + + sub x2, x2, #64 + + eor v0.16b, v0.16b, RIV.16b - ld1 {RIV.16b}, [x3]; + ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64 + ld1 {RTMP4.16b-RTMP7.16b}, [x2], #64 -.Lcbc_loop_blk: - subs w4, w4, #8; - bmi .Lcbc_end; + eor v1.16b, v1.16b, RTMP0.16b + eor v2.16b, v2.16b, RTMP1.16b + eor v3.16b, v3.16b, RTMP2.16b + eor v4.16b, v4.16b, RTMP3.16b + eor v5.16b, v5.16b, RTMP4.16b + eor v6.16b, v6.16b, RTMP5.16b + eor v7.16b, v7.16b, RTMP6.16b - ld1 {v0.16b-v3.16b}, [x2], #64; - ld1 {v4.16b-v7.16b}, [x2]; + mov RIV.16b, RTMP7.16b - SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); + st1 {v0.16b-v3.16b}, [x1], #64 + st1 {v4.16b-v7.16b}, [x1], #64 - sub x2, x2, #64; - eor v0.16b, v0.16b, RIV.16b; - ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; - eor v1.16b, v1.16b, RTMP0.16b; - eor v2.16b, v2.16b, RTMP1.16b; - eor v3.16b, v3.16b, RTMP2.16b; - st1 {v0.16b-v3.16b}, [x1], #64; + cbz w4, .Lcbc_dec_end + b .Lcbc_dec_loop_8x - eor v4.16b, v4.16b, RTMP3.16b; - ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; - eor v5.16b, v5.16b, RTMP0.16b; - eor v6.16b, v6.16b, RTMP1.16b; - eor v7.16b, v7.16b, RTMP2.16b; +.Lcbc_dec_4x: + add w4, w4, #8 + cmp w4, #4 + blt .Lcbc_dec_tail - mov RIV.16b, RTMP3.16b; - st1 {v4.16b-v7.16b}, [x1], #64; + sub w4, w4, #4 - b .Lcbc_loop_blk; + ld1 {v0.16b-v3.16b}, [x2], #64 -.Lcbc_end: + rev32 v4.16b, v0.16b + rev32 v5.16b, v1.16b + rev32 v6.16b, v2.16b + rev32 v7.16b, v3.16b + + transpose_4x4(v4, v5, v6, v7) + + SM4_CRYPT_BLK4_BE(v4, v5, v6, v7) + + eor v4.16b, v4.16b, RIV.16b + eor v5.16b, v5.16b, v0.16b + eor v6.16b, v6.16b, v1.16b + eor v7.16b, v7.16b, v2.16b + + mov RIV.16b, v3.16b + + st1 {v4.16b-v7.16b}, [x1], #64 + + cbz w4, .Lcbc_dec_end + +.Lcbc_dec_tail: + cmp w4, #2 + ld1 {v0.16b}, [x2], #16 + blt .Lcbc_dec_tail_load_done + ld1 {v1.16b}, [x2], #16 + beq .Lcbc_dec_tail_load_done + ld1 {v2.16b}, [x2], #16 + +.Lcbc_dec_tail_load_done: + rev32 v4.16b, v0.16b + rev32 v5.16b, v1.16b + rev32 v6.16b, v2.16b + + transpose_4x4(v4, v5, v6, v7) + + SM4_CRYPT_BLK4_BE(v4, v5, v6, v7) + + cmp w4, #2 + eor v4.16b, v4.16b, RIV.16b + mov RIV.16b, v0.16b + st1 {v4.16b}, [x1], #16 + blt .Lcbc_dec_end + + eor v5.16b, v5.16b, v0.16b + mov RIV.16b, v1.16b + st1 {v5.16b}, [x1], #16 + beq .Lcbc_dec_end + + eor v6.16b, v6.16b, v1.16b + mov RIV.16b, v2.16b + st1 {v6.16b}, [x1], #16 + +.Lcbc_dec_end: /* store new IV */ - st1 {RIV.16b}, [x3]; + st1 {RIV.16b}, [x3] - ret; -SYM_FUNC_END(sm4_neon_cbc_dec_blk8) + ret +SYM_FUNC_END(sm4_neon_cbc_dec) .align 3 -SYM_FUNC_START(sm4_neon_cfb_dec_blk8) +SYM_FUNC_START(sm4_neon_cfb_dec) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: iv (big endian, 128 bit) - * w4: nblocks (multiples of 8) + * w4: nblocks */ - PREPARE; + SM4_PREPARE() + + ld1 {v0.16b}, [x3] + +.Lcfb_dec_loop_8x: + sub w4, w4, #8 + tbnz w4, #31, .Lcfb_dec_4x + + ld1 {v1.16b-v3.16b}, [x2], #48 + ld4 {v4.4s-v7.4s}, [x2] + + transpose_4x4(v0, v1, v2, v3) + + SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7) + + sub x2, x2, #48 + ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64 + ld1 {RTMP4.16b-RTMP7.16b}, [x2], #64 + + eor v0.16b, v0.16b, RTMP0.16b + eor v1.16b, v1.16b, RTMP1.16b + eor v2.16b, v2.16b, RTMP2.16b + eor v3.16b, v3.16b, RTMP3.16b + eor v4.16b, v4.16b, RTMP4.16b + eor v5.16b, v5.16b, RTMP5.16b + eor v6.16b, v6.16b, RTMP6.16b + eor v7.16b, v7.16b, RTMP7.16b + + st1 {v0.16b-v3.16b}, [x1], #64 + st1 {v4.16b-v7.16b}, [x1], #64 + + mov v0.16b, RTMP7.16b + + cbz w4, .Lcfb_dec_end + b .Lcfb_dec_loop_8x + +.Lcfb_dec_4x: + add w4, w4, #8 + cmp w4, #4 + blt .Lcfb_dec_tail + + sub w4, w4, #4 + + ld1 {v4.16b-v7.16b}, [x2], #64 + + rev32 v0.16b, v0.16b /* v0 is IV register */ + rev32 v1.16b, v4.16b + rev32 v2.16b, v5.16b + rev32 v3.16b, v6.16b + + transpose_4x4(v0, v1, v2, v3) + + SM4_CRYPT_BLK4_BE(v0, v1, v2, v3) - ld1 {v0.16b}, [x3]; + eor v0.16b, v0.16b, v4.16b + eor v1.16b, v1.16b, v5.16b + eor v2.16b, v2.16b, v6.16b + eor v3.16b, v3.16b, v7.16b -.Lcfb_loop_blk: - subs w4, w4, #8; - bmi .Lcfb_end; + st1 {v0.16b-v3.16b}, [x1], #64 - ld1 {v1.16b, v2.16b, v3.16b}, [x2], #48; - ld1 {v4.16b-v7.16b}, [x2]; + mov v0.16b, v7.16b - SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); + cbz w4, .Lcfb_dec_end - sub x2, x2, #48; - ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; - eor v0.16b, v0.16b, RTMP0.16b; - eor v1.16b, v1.16b, RTMP1.16b; - eor v2.16b, v2.16b, RTMP2.16b; - eor v3.16b, v3.16b, RTMP3.16b; - st1 {v0.16b-v3.16b}, [x1], #64; +.Lcfb_dec_tail: + cmp w4, #2 + ld1 {v4.16b}, [x2], #16 + blt .Lcfb_dec_tail_load_done + ld1 {v5.16b}, [x2], #16 + beq .Lcfb_dec_tail_load_done + ld1 {v6.16b}, [x2], #16 - ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; - eor v4.16b, v4.16b, RTMP0.16b; - eor v5.16b, v5.16b, RTMP1.16b; - eor v6.16b, v6.16b, RTMP2.16b; - eor v7.16b, v7.16b, RTMP3.16b; - st1 {v4.16b-v7.16b}, [x1], #64; +.Lcfb_dec_tail_load_done: + rev32 v0.16b, v0.16b /* v0 is IV register */ + rev32 v1.16b, v4.16b + rev32 v2.16b, v5.16b - mov v0.16b, RTMP3.16b; + transpose_4x4(v0, v1, v2, v3) - b .Lcfb_loop_blk; + SM4_CRYPT_BLK4_BE(v0, v1, v2, v3) -.Lcfb_end: + cmp w4, #2 + eor v0.16b, v0.16b, v4.16b + st1 {v0.16b}, [x1], #16 + mov v0.16b, v4.16b + blt .Lcfb_dec_end + + eor v1.16b, v1.16b, v5.16b + st1 {v1.16b}, [x1], #16 + mov v0.16b, v5.16b + beq .Lcfb_dec_end + + eor v2.16b, v2.16b, v6.16b + st1 {v2.16b}, [x1], #16 + mov v0.16b, v6.16b + +.Lcfb_dec_end: /* store new IV */ - st1 {v0.16b}, [x3]; + st1 {v0.16b}, [x3] - ret; -SYM_FUNC_END(sm4_neon_cfb_dec_blk8) + ret +SYM_FUNC_END(sm4_neon_cfb_dec) .align 3 -SYM_FUNC_START(sm4_neon_ctr_enc_blk8) +SYM_FUNC_START(sm4_neon_ctr_crypt) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: ctr (big endian, 128 bit) - * w4: nblocks (multiples of 8) + * w4: nblocks */ - PREPARE; + SM4_PREPARE() - ldp x7, x8, [x3]; - rev x7, x7; - rev x8, x8; + ldp x7, x8, [x3] + rev x7, x7 + rev x8, x8 -.Lctr_loop_blk: - subs w4, w4, #8; - bmi .Lctr_end; +.Lctr_crypt_loop_8x: + sub w4, w4, #8 + tbnz w4, #31, .Lctr_crypt_4x -#define inc_le128(vctr) \ - mov vctr.d[1], x8; \ - mov vctr.d[0], x7; \ - adds x8, x8, #1; \ - adc x7, x7, xzr; \ - rev64 vctr.16b, vctr.16b; +#define inc_le128(vctr) \ + mov vctr.d[1], x8; \ + mov vctr.d[0], x7; \ + adds x8, x8, #1; \ + rev64 vctr.16b, vctr.16b; \ + adc x7, x7, xzr; /* construct CTRs */ - inc_le128(v0); /* +0 */ - inc_le128(v1); /* +1 */ - inc_le128(v2); /* +2 */ - inc_le128(v3); /* +3 */ - inc_le128(v4); /* +4 */ - inc_le128(v5); /* +5 */ - inc_le128(v6); /* +6 */ - inc_le128(v7); /* +7 */ - - SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); - - ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; - eor v0.16b, v0.16b, RTMP0.16b; - eor v1.16b, v1.16b, RTMP1.16b; - eor v2.16b, v2.16b, RTMP2.16b; - eor v3.16b, v3.16b, RTMP3.16b; - st1 {v0.16b-v3.16b}, [x1], #64; - - ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; - eor v4.16b, v4.16b, RTMP0.16b; - eor v5.16b, v5.16b, RTMP1.16b; - eor v6.16b, v6.16b, RTMP2.16b; - eor v7.16b, v7.16b, RTMP3.16b; - st1 {v4.16b-v7.16b}, [x1], #64; - - b .Lctr_loop_blk; - -.Lctr_end: + inc_le128(v0) /* +0 */ + inc_le128(v1) /* +1 */ + inc_le128(v2) /* +2 */ + inc_le128(v3) /* +3 */ + inc_le128(v4) /* +4 */ + inc_le128(v5) /* +5 */ + inc_le128(v6) /* +6 */ + inc_le128(v7) /* +7 */ + + transpose_4x4_2x(v0, v1, v2, v3, v4, v5, v6, v7) + + SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7) + + ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64 + ld1 {RTMP4.16b-RTMP7.16b}, [x2], #64 + + eor v0.16b, v0.16b, RTMP0.16b + eor v1.16b, v1.16b, RTMP1.16b + eor v2.16b, v2.16b, RTMP2.16b + eor v3.16b, v3.16b, RTMP3.16b + eor v4.16b, v4.16b, RTMP4.16b + eor v5.16b, v5.16b, RTMP5.16b + eor v6.16b, v6.16b, RTMP6.16b + eor v7.16b, v7.16b, RTMP7.16b + + st1 {v0.16b-v3.16b}, [x1], #64 + st1 {v4.16b-v7.16b}, [x1], #64 + + cbz w4, .Lctr_crypt_end + b .Lctr_crypt_loop_8x + +.Lctr_crypt_4x: + add w4, w4, #8 + cmp w4, #4 + blt .Lctr_crypt_tail + + sub w4, w4, #4 + + /* construct CTRs */ + inc_le128(v0) /* +0 */ + inc_le128(v1) /* +1 */ + inc_le128(v2) /* +2 */ + inc_le128(v3) /* +3 */ + + ld1 {v4.16b-v7.16b}, [x2], #64 + + transpose_4x4(v0, v1, v2, v3) + + SM4_CRYPT_BLK4(v0, v1, v2, v3) + + eor v0.16b, v0.16b, v4.16b + eor v1.16b, v1.16b, v5.16b + eor v2.16b, v2.16b, v6.16b + eor v3.16b, v3.16b, v7.16b + + st1 {v0.16b-v3.16b}, [x1], #64 + + cbz w4, .Lctr_crypt_end + +.Lctr_crypt_tail: + /* inc_le128 will change the sign bit */ + ld1 {v4.16b}, [x2], #16 + inc_le128(v0) + cmp w4, #2 + blt .Lctr_crypt_tail_load_done + + ld1 {v5.16b}, [x2], #16 + inc_le128(v1) + cmp w4, #2 + beq .Lctr_crypt_tail_load_done + + ld1 {v6.16b}, [x2], #16 + inc_le128(v2) + +.Lctr_crypt_tail_load_done: + transpose_4x4(v0, v1, v2, v3) + + SM4_CRYPT_BLK4(v0, v1, v2, v3) + + cmp w4, #2 + + eor v0.16b, v0.16b, v4.16b + st1 {v0.16b}, [x1], #16 + blt .Lctr_crypt_end + + eor v1.16b, v1.16b, v5.16b + st1 {v1.16b}, [x1], #16 + beq .Lctr_crypt_end + + eor v2.16b, v2.16b, v6.16b + st1 {v2.16b}, [x1], #16 + +.Lctr_crypt_end: /* store new CTR */ - rev x7, x7; - rev x8, x8; - stp x7, x8, [x3]; + rev x7, x7 + rev x8, x8 + stp x7, x8, [x3] - ret; -SYM_FUNC_END(sm4_neon_ctr_enc_blk8) + ret +SYM_FUNC_END(sm4_neon_ctr_crypt) |