summaryrefslogtreecommitdiffstats
path: root/arch/x86/crypto/twofish-avx-x86_64-asm_64.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/crypto/twofish-avx-x86_64-asm_64.S')
-rw-r--r--arch/x86/crypto/twofish-avx-x86_64-asm_64.S300
1 files changed, 300 insertions, 0 deletions
diff --git a/arch/x86/crypto/twofish-avx-x86_64-asm_64.S b/arch/x86/crypto/twofish-avx-x86_64-asm_64.S
new file mode 100644
index 0000000..35f4557
--- /dev/null
+++ b/arch/x86/crypto/twofish-avx-x86_64-asm_64.S
@@ -0,0 +1,300 @@
+/*
+ * Twofish Cipher 8-way parallel algorithm (AVX/x86_64)
+ *
+ * Copyright (C) 2012 Johannes Goetzfried
+ * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ *
+ */
+
+.file "twofish-avx-x86_64-asm_64.S"
+.text
+
+/* structure of crypto context */
+#define s0 0
+#define s1 1024
+#define s2 2048
+#define s3 3072
+#define w 4096
+#define k 4128
+
+/**********************************************************************
+ 8-way AVX twofish
+ **********************************************************************/
+#define CTX %rdi
+
+#define RA1 %xmm0
+#define RB1 %xmm1
+#define RC1 %xmm2
+#define RD1 %xmm3
+
+#define RA2 %xmm4
+#define RB2 %xmm5
+#define RC2 %xmm6
+#define RD2 %xmm7
+
+#define RX %xmm8
+#define RY %xmm9
+
+#define RK1 %xmm10
+#define RK2 %xmm11
+
+#define RID1 %rax
+#define RID1b %al
+#define RID2 %rbx
+#define RID2b %bl
+
+#define RGI1 %rdx
+#define RGI1bl %dl
+#define RGI1bh %dh
+#define RGI2 %rcx
+#define RGI2bl %cl
+#define RGI2bh %ch
+
+#define RGS1 %r8
+#define RGS1d %r8d
+#define RGS2 %r9
+#define RGS2d %r9d
+#define RGS3 %r10
+#define RGS3d %r10d
+
+
+#define lookup_32bit(t0, t1, t2, t3, src, dst) \
+ movb src ## bl, RID1b; \
+ movb src ## bh, RID2b; \
+ movl t0(CTX, RID1, 4), dst ## d; \
+ xorl t1(CTX, RID2, 4), dst ## d; \
+ shrq $16, src; \
+ movb src ## bl, RID1b; \
+ movb src ## bh, RID2b; \
+ xorl t2(CTX, RID1, 4), dst ## d; \
+ xorl t3(CTX, RID2, 4), dst ## d;
+
+#define G(a, x, t0, t1, t2, t3) \
+ vmovq a, RGI1; \
+ vpsrldq $8, a, x; \
+ vmovq x, RGI2; \
+ \
+ lookup_32bit(t0, t1, t2, t3, RGI1, RGS1); \
+ shrq $16, RGI1; \
+ lookup_32bit(t0, t1, t2, t3, RGI1, RGS2); \
+ shlq $32, RGS2; \
+ orq RGS1, RGS2; \
+ \
+ lookup_32bit(t0, t1, t2, t3, RGI2, RGS1); \
+ shrq $16, RGI2; \
+ lookup_32bit(t0, t1, t2, t3, RGI2, RGS3); \
+ shlq $32, RGS3; \
+ orq RGS1, RGS3; \
+ \
+ vmovq RGS2, x; \
+ vpinsrq $1, RGS3, x, x;
+
+#define encround(a, b, c, d, x, y) \
+ G(a, x, s0, s1, s2, s3); \
+ G(b, y, s1, s2, s3, s0); \
+ vpaddd x, y, x; \
+ vpaddd y, x, y; \
+ vpaddd x, RK1, x; \
+ vpaddd y, RK2, y; \
+ vpxor x, c, c; \
+ vpsrld $1, c, x; \
+ vpslld $(32 - 1), c, c; \
+ vpor c, x, c; \
+ vpslld $1, d, x; \
+ vpsrld $(32 - 1), d, d; \
+ vpor d, x, d; \
+ vpxor d, y, d;
+
+#define decround(a, b, c, d, x, y) \
+ G(a, x, s0, s1, s2, s3); \
+ G(b, y, s1, s2, s3, s0); \
+ vpaddd x, y, x; \
+ vpaddd y, x, y; \
+ vpaddd y, RK2, y; \
+ vpxor d, y, d; \
+ vpsrld $1, d, y; \
+ vpslld $(32 - 1), d, d; \
+ vpor d, y, d; \
+ vpslld $1, c, y; \
+ vpsrld $(32 - 1), c, c; \
+ vpor c, y, c; \
+ vpaddd x, RK1, x; \
+ vpxor x, c, c;
+
+#define encrypt_round(n, a, b, c, d) \
+ vbroadcastss (k+4*(2*(n)))(CTX), RK1; \
+ vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \
+ encround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \
+ encround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY);
+
+#define decrypt_round(n, a, b, c, d) \
+ vbroadcastss (k+4*(2*(n)))(CTX), RK1; \
+ vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \
+ decround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \
+ decround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY);
+
+#define encrypt_cycle(n) \
+ encrypt_round((2*n), RA, RB, RC, RD); \
+ encrypt_round(((2*n) + 1), RC, RD, RA, RB);
+
+#define decrypt_cycle(n) \
+ decrypt_round(((2*n) + 1), RC, RD, RA, RB); \
+ decrypt_round((2*n), RA, RB, RC, RD);
+
+
+#define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
+ vpunpckldq x1, x0, t0; \
+ vpunpckhdq x1, x0, t2; \
+ vpunpckldq x3, x2, t1; \
+ vpunpckhdq x3, x2, x3; \
+ \
+ vpunpcklqdq t1, t0, x0; \
+ vpunpckhqdq t1, t0, x1; \
+ vpunpcklqdq x3, t2, x2; \
+ vpunpckhqdq x3, t2, x3;
+
+#define inpack_blocks(in, x0, x1, x2, x3, wkey, t0, t1, t2) \
+ vpxor (0*4*4)(in), wkey, x0; \
+ vpxor (1*4*4)(in), wkey, x1; \
+ vpxor (2*4*4)(in), wkey, x2; \
+ vpxor (3*4*4)(in), wkey, x3; \
+ \
+ transpose_4x4(x0, x1, x2, x3, t0, t1, t2)
+
+#define outunpack_blocks(out, x0, x1, x2, x3, wkey, t0, t1, t2) \
+ transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
+ \
+ vpxor x0, wkey, x0; \
+ vmovdqu x0, (0*4*4)(out); \
+ vpxor x1, wkey, x1; \
+ vmovdqu x1, (1*4*4)(out); \
+ vpxor x2, wkey, x2; \
+ vmovdqu x2, (2*4*4)(out); \
+ vpxor x3, wkey, x3; \
+ vmovdqu x3, (3*4*4)(out);
+
+#define outunpack_xor_blocks(out, x0, x1, x2, x3, wkey, t0, t1, t2) \
+ transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
+ \
+ vpxor x0, wkey, x0; \
+ vpxor (0*4*4)(out), x0, x0; \
+ vmovdqu x0, (0*4*4)(out); \
+ vpxor x1, wkey, x1; \
+ vpxor (1*4*4)(out), x1, x1; \
+ vmovdqu x1, (1*4*4)(out); \
+ vpxor x2, wkey, x2; \
+ vpxor (2*4*4)(out), x2, x2; \
+ vmovdqu x2, (2*4*4)(out); \
+ vpxor x3, wkey, x3; \
+ vpxor (3*4*4)(out), x3, x3; \
+ vmovdqu x3, (3*4*4)(out);
+
+.align 8
+.global __twofish_enc_blk_8way
+.type __twofish_enc_blk_8way,@function;
+
+__twofish_enc_blk_8way:
+ /* input:
+ * %rdi: ctx, CTX
+ * %rsi: dst
+ * %rdx: src
+ * %rcx: bool, if true: xor output
+ */
+
+ pushq %rbx;
+ pushq %rcx;
+
+ vmovdqu w(CTX), RK1;
+
+ leaq (4*4*4)(%rdx), %rax;
+ inpack_blocks(%rdx, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2);
+ inpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2);
+
+ xorq RID1, RID1;
+ xorq RID2, RID2;
+
+ encrypt_cycle(0);
+ encrypt_cycle(1);
+ encrypt_cycle(2);
+ encrypt_cycle(3);
+ encrypt_cycle(4);
+ encrypt_cycle(5);
+ encrypt_cycle(6);
+ encrypt_cycle(7);
+
+ vmovdqu (w+4*4)(CTX), RK1;
+
+ popq %rcx;
+ popq %rbx;
+
+ leaq (4*4*4)(%rsi), %rax;
+
+ testb %cl, %cl;
+ jnz __enc_xor8;
+
+ outunpack_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2);
+ outunpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2);
+
+ ret;
+
+__enc_xor8:
+ outunpack_xor_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2);
+ outunpack_xor_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2);
+
+ ret;
+
+.align 8
+.global twofish_dec_blk_8way
+.type twofish_dec_blk_8way,@function;
+
+twofish_dec_blk_8way:
+ /* input:
+ * %rdi: ctx, CTX
+ * %rsi: dst
+ * %rdx: src
+ */
+
+ pushq %rbx;
+
+ vmovdqu (w+4*4)(CTX), RK1;
+
+ leaq (4*4*4)(%rdx), %rax;
+ inpack_blocks(%rdx, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2);
+ inpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2);
+
+ xorq RID1, RID1;
+ xorq RID2, RID2;
+
+ decrypt_cycle(7);
+ decrypt_cycle(6);
+ decrypt_cycle(5);
+ decrypt_cycle(4);
+ decrypt_cycle(3);
+ decrypt_cycle(2);
+ decrypt_cycle(1);
+ decrypt_cycle(0);
+
+ vmovdqu (w)(CTX), RK1;
+
+ popq %rbx;
+
+ leaq (4*4*4)(%rsi), %rax;
+ outunpack_blocks(%rsi, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2);
+ outunpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2);
+
+ ret;